Category: CHECKWIND.API

New CHECKWIND.API endpoints: AS/NZS 1170.2-2021 and CSA S37-18

Two new CHECKWIND.API endpoints are now live:

  1. AS/NZS 1170.2-2021: Structural design actions – Part 2: Wind actions. This does not replace the existing AS/NZS 1170.2-2011 endpoint. Both endpoints will run side-by-side for at least 1-2 years while the industry transitions to the new version and we will continue to keep both updated as necessary. The only change to the response for AS/NZS 1170.2-2021 is the introduction of the climate change multiplier Mc. A sample response is given below.
  2. CSA S37-18: Antennas, towers, and antenna-supporting structures.
{
    "results": {
        "siteElevation": 11.5,
        "windRegion": "B1",
        "critical": "SOUTH WEST",
        "regionalWindSpeed": {
            "vr10": 33,
            "vr25": 39,
            "vr50": 44,
            "vr100": 48,
            "vr200": 52,
            "vr500": 57,
            "vr1000": 60,
            "vr2500": 64
        },
        "north": {
            "md": 0.75,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.6,
                        "mzcat": 0.782,
                        "zones": [
                            {
                                "extent": 400.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 30.0,
                        "bs": 76.24,
                        "ms": 0.7045
                    },
                    "topography": {
                        "critical": "NORTH NORTH EAST",
                        "type": "FLAT",
                        "h": 9.5,
                        "lu": 173.04,
                        "x": -80.04,
                        "upwindSlope": 0.0275,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 30.0,
                    "elevation": 7.5,
                    "footprint": [
                        {
                            "lat": -27.468529,
                            "lng": 153.025103
                        },
                        {
                            "lat": -27.468864,
                            "lng": 153.024655
                        },
                        {
                            "lat": -27.468886,
                            "lng": 153.024647
                        },
                        {
                            "lat": -27.469183,
                            "lng": 153.024936
                        },
                        {
                            "lat": -27.469183,
                            "lng": 153.024952
                        },
                        {
                            "lat": -27.46915,
                            "lng": 153.025011
                        },
                        {
                            "lat": -27.469031,
                            "lng": 153.02517
                        },
                        {
                            "lat": -27.469033,
                            "lng": 153.025175
                        },
                        {
                            "lat": -27.469057,
                            "lng": 153.025178
                        },
                        {
                            "lat": -27.4692,
                            "lng": 153.024982
                        },
                        {
                            "lat": -27.469219,
                            "lng": 153.024974
                        },
                        {
                            "lat": -27.469433,
                            "lng": 153.025175
                        },
                        {
                            "lat": -27.469445,
                            "lng": 153.025178
                        },
                        {
                            "lat": -27.469502,
                            "lng": 153.025234
                        },
                        {
                            "lat": -27.469507,
                            "lng": 153.025253
                        },
                        {
                            "lat": -27.469393,
                            "lng": 153.02539
                        },
                        {
                            "lat": -27.469267,
                            "lng": 153.025558
                        },
                        {
                            "lat": -27.469155,
                            "lng": 153.025693
                        },
                        {
                            "lat": -27.469143,
                            "lng": 153.025693
                        },
                        {
                            "lat": -27.468529,
                            "lng": 153.025113
                        },
                        {
                            "lat": -27.468529,
                            "lng": 153.025103
                        }
                    ]
                }
            ]
        },
        "northEast": {
            "md": 0.75,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 4.0,
                        "mzcat": 0.75,
                        "zones": [
                            {
                                "extent": 600.0,
                                "category": 4.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 30.0,
                        "bs": 29.22,
                        "ms": 0.7689
                    },
                    "topography": {
                        "critical": "NORTH NORTH EAST",
                        "type": "FLAT",
                        "h": 9.5,
                        "lu": 173.04,
                        "x": -80.04,
                        "upwindSlope": 0.0275,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 9.5,
                    "footprint": [
                        {
                            "lat": -27.469302,
                            "lng": 153.025577
                        },
                        {
                            "lat": -27.469314,
                            "lng": 153.02555
                        },
                        {
                            "lat": -27.469538,
                            "lng": 153.025274
                        },
                        {
                            "lat": -27.4696,
                            "lng": 153.025309
                        },
                        {
                            "lat": -27.469595,
                            "lng": 153.025328
                        },
                        {
                            "lat": -27.469495,
                            "lng": 153.025459
                        },
                        {
                            "lat": -27.469504,
                            "lng": 153.025478
                        },
                        {
                            "lat": -27.469388,
                            "lng": 153.025634
                        },
                        {
                            "lat": -27.46935,
                            "lng": 153.025617
                        },
                        {
                            "lat": -27.469302,
                            "lng": 153.025577
                        }
                    ]
                }
            ]
        },
        "east": {
            "md": 0.85,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.8,
                        "mzcat": 0.766,
                        "zones": [
                            {
                                "extent": 500.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 2.0,
                        "hs": 12.0,
                        "bs": 21.65,
                        "ms": 0.8034
                    },
                    "topography": {
                        "critical": "EAST SOUTH EAST",
                        "type": "FLAT",
                        "h": 15.5,
                        "lu": 405.15,
                        "x": -260.92,
                        "upwindSlope": 0.0191,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 15.0,
                    "elevation": 6.0,
                    "footprint": [
                        {
                            "lat": -27.469788,
                            "lng": 153.026181
                        },
                        {
                            "lat": -27.469788,
                            "lng": 153.026167
                        },
                        {
                            "lat": -27.469838,
                            "lng": 153.026106
                        },
                        {
                            "lat": -27.46979,
                            "lng": 153.026055
                        },
                        {
                            "lat": -27.46979,
                            "lng": 153.026044
                        },
                        {
                            "lat": -27.470009,
                            "lng": 153.02576
                        },
                        {
                            "lat": -27.470021,
                            "lng": 153.02576
                        },
                        {
                            "lat": -27.470268,
                            "lng": 153.026001
                        },
                        {
                            "lat": -27.470256,
                            "lng": 153.026028
                        },
                        {
                            "lat": -27.469992,
                            "lng": 153.026368
                        },
                        {
                            "lat": -27.469976,
                            "lng": 153.026366
                        },
                        {
                            "lat": -27.469788,
                            "lng": 153.026181
                        }
                    ]
                }
            ]
        },
        "southEast": {
            "md": 0.9,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.6,
                        "mzcat": 0.782,
                        "zones": [
                            {
                                "extent": 400.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 3.0,
                        "hs": 13.0,
                        "bs": 20.24,
                        "ms": 0.7712
                    },
                    "topography": {
                        "critical": "SOUTH EAST",
                        "type": "ESCARPMENT",
                        "h": 10.0,
                        "lu": 70.3,
                        "x": -400.83,
                        "upwindSlope": 0.0711,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": "Distance between site and feature crest (x) is greater than 10 × Crest Elevation (160.00 m)."
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 7.5,
                    "footprint": [
                        {
                            "lat": -27.470444,
                            "lng": 153.02573
                        },
                        {
                            "lat": -27.470442,
                            "lng": 153.025682
                        },
                        {
                            "lat": -27.470449,
                            "lng": 153.025674
                        },
                        {
                            "lat": -27.470466,
                            "lng": 153.025674
                        },
                        {
                            "lat": -27.470528,
                            "lng": 153.025591
                        },
                        {
                            "lat": -27.47053,
                            "lng": 153.025561
                        },
                        {
                            "lat": -27.470578,
                            "lng": 153.025499
                        },
                        {
                            "lat": -27.470575,
                            "lng": 153.025481
                        },
                        {
                            "lat": -27.470606,
                            "lng": 153.025451
                        },
                        {
                            "lat": -27.470618,
                            "lng": 153.025451
                        },
                        {
                            "lat": -27.470628,
                            "lng": 153.025459
                        },
                        {
                            "lat": -27.470628,
                            "lng": 153.025473
                        },
                        {
                            "lat": -27.470594,
                            "lng": 153.025518
                        },
                        {
                            "lat": -27.47064,
                            "lng": 153.025564
                        },
                        {
                            "lat": -27.470649,
                            "lng": 153.025564
                        },
                        {
                            "lat": -27.470649,
                            "lng": 153.025577
                        },
                        {
                            "lat": -27.470516,
                            "lng": 153.025752
                        },
                        {
                            "lat": -27.470504,
                            "lng": 153.025752
                        },
                        {
                            "lat": -27.47048,
                            "lng": 153.025727
                        },
                        {
                            "lat": -27.470444,
                            "lng": 153.02573
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 7.0,
                    "footprint": [
                        {
                            "lat": -27.470221,
                            "lng": 153.025674
                        },
                        {
                            "lat": -27.470247,
                            "lng": 153.025642
                        },
                        {
                            "lat": -27.470256,
                            "lng": 153.025642
                        },
                        {
                            "lat": -27.470311,
                            "lng": 153.025695
                        },
                        {
                            "lat": -27.470344,
                            "lng": 153.025655
                        },
                        {
                            "lat": -27.470354,
                            "lng": 153.025655
                        },
                        {
                            "lat": -27.470373,
                            "lng": 153.025674
                        },
                        {
                            "lat": -27.470375,
                            "lng": 153.025741
                        },
                        {
                            "lat": -27.47034,
                            "lng": 153.025744
                        },
                        {
                            "lat": -27.470323,
                            "lng": 153.025768
                        },
                        {
                            "lat": -27.470309,
                            "lng": 153.02577
                        },
                        {
                            "lat": -27.470221,
                            "lng": 153.025685
                        },
                        {
                            "lat": -27.470221,
                            "lng": 153.025674
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 11.0,
                    "footprint": [
                        {
                            "lat": -27.469747,
                            "lng": 153.025188
                        },
                        {
                            "lat": -27.469747,
                            "lng": 153.025175
                        },
                        {
                            "lat": -27.469792,
                            "lng": 153.025111
                        },
                        {
                            "lat": -27.469807,
                            "lng": 153.025111
                        },
                        {
                            "lat": -27.46984,
                            "lng": 153.025143
                        },
                        {
                            "lat": -27.469838,
                            "lng": 153.025159
                        },
                        {
                            "lat": -27.469795,
                            "lng": 153.025221
                        },
                        {
                            "lat": -27.469785,
                            "lng": 153.025221
                        },
                        {
                            "lat": -27.469747,
                            "lng": 153.025188
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 8.5,
                    "footprint": [
                        {
                            "lat": -27.470459,
                            "lng": 153.025508
                        },
                        {
                            "lat": -27.470459,
                            "lng": 153.025497
                        },
                        {
                            "lat": -27.470497,
                            "lng": 153.025446
                        },
                        {
                            "lat": -27.470511,
                            "lng": 153.025446
                        },
                        {
                            "lat": -27.470528,
                            "lng": 153.025465
                        },
                        {
                            "lat": -27.470528,
                            "lng": 153.025475
                        },
                        {
                            "lat": -27.470487,
                            "lng": 153.025526
                        },
                        {
                            "lat": -27.470478,
                            "lng": 153.025526
                        },
                        {
                            "lat": -27.470459,
                            "lng": 153.025508
                        }
                    ]
                }
            ]
        },
        "south": {
            "md": 0.95,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.6,
                        "mzcat": 0.782,
                        "zones": [
                            {
                                "extent": 400.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 2.0,
                        "hs": 12.0,
                        "bs": 30.35,
                        "ms": 0.7747
                    },
                    "topography": {
                        "critical": "SOUTH SOUTH EAST",
                        "type": "RIDGE",
                        "h": 17.0,
                        "lu": 60.12,
                        "x": -301.21,
                        "upwindSlope": 0.1414,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": "Distance between site and feature crest (x) is greater than 10 × Crest Elevation (225.00 m)."
                    }
                }
            ],
            "structures": [
                {
                    "height": 15.0,
                    "elevation": 9.0,
                    "footprint": [
                        {
                            "lat": -27.470178,
                            "lng": 153.025644
                        },
                        {
                            "lat": -27.470121,
                            "lng": 153.025588
                        },
                        {
                            "lat": -27.470121,
                            "lng": 153.025575
                        },
                        {
                            "lat": -27.470354,
                            "lng": 153.025269
                        },
                        {
                            "lat": -27.470368,
                            "lng": 153.025263
                        },
                        {
                            "lat": -27.470378,
                            "lng": 153.025272
                        },
                        {
                            "lat": -27.470392,
                            "lng": 153.025253
                        },
                        {
                            "lat": -27.470321,
                            "lng": 153.025183
                        },
                        {
                            "lat": -27.470321,
                            "lng": 153.025164
                        },
                        {
                            "lat": -27.47029,
                            "lng": 153.025137
                        },
                        {
                            "lat": -27.47029,
                            "lng": 153.025127
                        },
                        {
                            "lat": -27.470325,
                            "lng": 153.025084
                        },
                        {
                            "lat": -27.470414,
                            "lng": 153.025076
                        },
                        {
                            "lat": -27.470435,
                            "lng": 153.025111
                        },
                        {
                            "lat": -27.470466,
                            "lng": 153.025129
                        },
                        {
                            "lat": -27.470471,
                            "lng": 153.025145
                        },
                        {
                            "lat": -27.470494,
                            "lng": 153.025162
                        },
                        {
                            "lat": -27.470494,
                            "lng": 153.025202
                        },
                        {
                            "lat": -27.470521,
                            "lng": 153.025215
                        },
                        {
                            "lat": -27.470513,
                            "lng": 153.025239
                        },
                        {
                            "lat": -27.470528,
                            "lng": 153.025333
                        },
                        {
                            "lat": -27.470468,
                            "lng": 153.025411
                        },
                        {
                            "lat": -27.470404,
                            "lng": 153.025419
                        },
                        {
                            "lat": -27.470333,
                            "lng": 153.025513
                        },
                        {
                            "lat": -27.470335,
                            "lng": 153.025626
                        },
                        {
                            "lat": -27.470333,
                            "lng": 153.025644
                        },
                        {
                            "lat": -27.470316,
                            "lng": 153.025666
                        },
                        {
                            "lat": -27.470304,
                            "lng": 153.025666
                        },
                        {
                            "lat": -27.470247,
                            "lng": 153.025609
                        },
                        {
                            "lat": -27.470228,
                            "lng": 153.025609
                        },
                        {
                            "lat": -27.470209,
                            "lng": 153.025636
                        },
                        {
                            "lat": -27.470195,
                            "lng": 153.025634
                        },
                        {
                            "lat": -27.470178,
                            "lng": 153.025644
                        }
                    ]
                },
                {
                    "height": 9.0,
                    "elevation": 10.5,
                    "footprint": [
                        {
                            "lat": -27.46979,
                            "lng": 153.025288
                        },
                        {
                            "lat": -27.46979,
                            "lng": 153.025274
                        },
                        {
                            "lat": -27.469854,
                            "lng": 153.025186
                        },
                        {
                            "lat": -27.469885,
                            "lng": 153.025156
                        },
                        {
                            "lat": -27.469923,
                            "lng": 153.025078
                        },
                        {
                            "lat": -27.469969,
                            "lng": 153.025027
                        },
                        {
                            "lat": -27.469978,
                            "lng": 153.025027
                        },
                        {
                            "lat": -27.470026,
                            "lng": 153.024966
                        },
                        {
                            "lat": -27.470035,
                            "lng": 153.024966
                        },
                        {
                            "lat": -27.47008,
                            "lng": 153.025014
                        },
                        {
                            "lat": -27.470102,
                            "lng": 153.025003
                        },
                        {
                            "lat": -27.470092,
                            "lng": 153.025025
                        },
                        {
                            "lat": -27.470171,
                            "lng": 153.025105
                        },
                        {
                            "lat": -27.470171,
                            "lng": 153.025119
                        },
                        {
                            "lat": -27.469945,
                            "lng": 153.025424
                        },
                        {
                            "lat": -27.469928,
                            "lng": 153.025419
                        },
                        {
                            "lat": -27.46983,
                            "lng": 153.025328
                        },
                        {
                            "lat": -27.46983,
                            "lng": 153.025312
                        },
                        {
                            "lat": -27.469819,
                            "lng": 153.025298
                        },
                        {
                            "lat": -27.46979,
                            "lng": 153.025288
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 11.0,
                    "footprint": [
                        {
                            "lat": -27.470107,
                            "lng": 153.024987
                        },
                        {
                            "lat": -27.470285,
                            "lng": 153.024968
                        },
                        {
                            "lat": -27.470302,
                            "lng": 153.024987
                        },
                        {
                            "lat": -27.470311,
                            "lng": 153.025057
                        },
                        {
                            "lat": -27.470273,
                            "lng": 153.025108
                        },
                        {
                            "lat": -27.470264,
                            "lng": 153.025108
                        },
                        {
                            "lat": -27.470221,
                            "lng": 153.025068
                        },
                        {
                            "lat": -27.470192,
                            "lng": 153.025076
                        },
                        {
                            "lat": -27.470123,
                            "lng": 153.025006
                        },
                        {
                            "lat": -27.470107,
                            "lng": 153.024998
                        },
                        {
                            "lat": -27.470107,
                            "lng": 153.024987
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 11.5,
                    "footprint": [
                        {
                            "lat": -27.470468,
                            "lng": 153.025044
                        },
                        {
                            "lat": -27.470468,
                            "lng": 153.025033
                        },
                        {
                            "lat": -27.470502,
                            "lng": 153.024993
                        },
                        {
                            "lat": -27.470513,
                            "lng": 153.024993
                        },
                        {
                            "lat": -27.47053,
                            "lng": 153.025009
                        },
                        {
                            "lat": -27.470525,
                            "lng": 153.025027
                        },
                        {
                            "lat": -27.470497,
                            "lng": 153.025062
                        },
                        {
                            "lat": -27.470485,
                            "lng": 153.025062
                        },
                        {
                            "lat": -27.470468,
                            "lng": 153.025044
                        }
                    ]
                }
            ]
        },
        "southWest": {
            "md": 0.95,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.4,
                        "mzcat": 0.878,
                        "zones": [
                            {
                                "extent": 300.0,
                                "category": 4.0
                            },
                            {
                                "extent": 400.0,
                                "category": 2.5
                            },
                            {
                                "extent": 600.0,
                                "category": 1.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 9.0,
                        "bs": 4.18,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "SOUTH SOUTH WEST",
                        "type": "ESCARPMENT",
                        "h": 15.5,
                        "lu": 34.29,
                        "x": 339.97,
                        "upwindSlope": 0.226,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": "Distance between site and feature crest (x) is greater than 10 × Crest Elevation (155.00 m)."
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 12.5,
                    "footprint": [
                        {
                            "lat": -27.470128,
                            "lng": 153.024883
                        },
                        {
                            "lat": -27.47013,
                            "lng": 153.024867
                        },
                        {
                            "lat": -27.470323,
                            "lng": 153.024612
                        },
                        {
                            "lat": -27.470342,
                            "lng": 153.024612
                        },
                        {
                            "lat": -27.470387,
                            "lng": 153.024657
                        },
                        {
                            "lat": -27.470385,
                            "lng": 153.024711
                        },
                        {
                            "lat": -27.470394,
                            "lng": 153.024722
                        },
                        {
                            "lat": -27.47039,
                            "lng": 153.024749
                        },
                        {
                            "lat": -27.470397,
                            "lng": 153.024762
                        },
                        {
                            "lat": -27.470397,
                            "lng": 153.024802
                        },
                        {
                            "lat": -27.470364,
                            "lng": 153.02485
                        },
                        {
                            "lat": -27.470344,
                            "lng": 153.02485
                        },
                        {
                            "lat": -27.470278,
                            "lng": 153.024877
                        },
                        {
                            "lat": -27.470166,
                            "lng": 153.024885
                        },
                        {
                            "lat": -27.470157,
                            "lng": 153.024896
                        },
                        {
                            "lat": -27.47014,
                            "lng": 153.024896
                        },
                        {
                            "lat": -27.470128,
                            "lng": 153.024883
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 13.0,
                    "footprint": [
                        {
                            "lat": -27.470442,
                            "lng": 153.024582
                        },
                        {
                            "lat": -27.470454,
                            "lng": 153.024582
                        },
                        {
                            "lat": -27.470492,
                            "lng": 153.02462
                        },
                        {
                            "lat": -27.470494,
                            "lng": 153.024687
                        },
                        {
                            "lat": -27.47054,
                            "lng": 153.024732
                        },
                        {
                            "lat": -27.470535,
                            "lng": 153.024751
                        },
                        {
                            "lat": -27.470466,
                            "lng": 153.024837
                        },
                        {
                            "lat": -27.470444,
                            "lng": 153.024837
                        },
                        {
                            "lat": -27.470433,
                            "lng": 153.024641
                        },
                        {
                            "lat": -27.470421,
                            "lng": 153.024622
                        },
                        {
                            "lat": -27.470421,
                            "lng": 153.024609
                        },
                        {
                            "lat": -27.470442,
                            "lng": 153.024582
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 13.0,
                    "footprint": [
                        {
                            "lat": -27.470147,
                            "lng": 153.024687
                        },
                        {
                            "lat": -27.470147,
                            "lng": 153.024676
                        },
                        {
                            "lat": -27.470216,
                            "lng": 153.024585
                        },
                        {
                            "lat": -27.47024,
                            "lng": 153.024598
                        },
                        {
                            "lat": -27.470247,
                            "lng": 153.02462
                        },
                        {
                            "lat": -27.47018,
                            "lng": 153.024708
                        },
                        {
                            "lat": -27.470147,
                            "lng": 153.024687
                        }
                    ]
                }
            ]
        },
        "west": {
            "md": 0.95,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.6,
                        "mzcat": 0.782,
                        "zones": [
                            {
                                "extent": 400.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 0.0,
                        "hs": 0.0,
                        "bs": 0.0,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "WEST NORTH WEST",
                        "type": "ESCARPMENT",
                        "h": 20.0,
                        "lu": 49.02,
                        "x": -1039.1,
                        "upwindSlope": 0.204,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": "Distance between site and feature crest (x) is greater than 10 × Crest Elevation (195.00 m)."
                    }
                }
            ],
            "structures": []
        },
        "northWest": {
            "md": 0.9,
            "mc": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.2,
                        "mzcat": 0.814,
                        "zones": [
                            {
                                "extent": 200.0,
                                "category": 4.0
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 30.0,
                        "bs": 3.28,
                        "ms": 0.926
                    },
                    "topography": {
                        "critical": "WEST NORTH WEST",
                        "type": "ESCARPMENT",
                        "h": 20.0,
                        "lu": 49.02,
                        "x": -1039.1,
                        "upwindSlope": 0.204,
                        "mh": 1.0,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0,
                        "comment": "Distance between site and feature crest (x) is greater than 10 × Crest Elevation (195.00 m)."
                    }
                }
            ],
            "structures": []
        },
        "snow": {
            "region": "NA",
            "alpine": "False"
        }
    },
    "elevationData": null,
    "version": "2.3.0.0"
}

 

CHECKWIND.API v2 now live

CHECKWIND.API v2 endpoints are now live. New features and enhancements include:

  • Significantly reduced response time.
  • Data is grouped by category (e.g. terrain, shielding, topography).
  • View your request history for a specific day or month with the “/history” endpoint.
  • Return Google’s elevation data to plot your own terrain profiles by adding includeElevationData=true to your request.

The legacy endpoints will continue to work side-by-side with the v2 endpoints for a transition period while existing customers migrate to the v2 endpoints, after which they will be removed.

Here’s an example response generated using the CHECKWIND.API v2 ASNZS1170 endpoint:

{
    "results": {
        "windRegion": "A2",
        "critical": "NORTH WEST",
        "regionalWindSpeed": {
            "vr10": 34,
            "vr25": 37,
            "vr50": 39,
            "vr100": 41,
            "vr200": 43,
            "vr500": 45,
            "vr1000": 46,
            "vr2500": 48
        },
        "north": {
            "md": 0.8,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.8,
                        "mzcat": 0.846,
                        "zones": [
                            {
                                "extent": 400.0,
                                "category": 3.0
                            },
                            {
                                "extent": 600.0,
                                "category": 2.5
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 0.0,
                        "hs": 0.0,
                        "bs": 0.0,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "NORTH NORTH WEST",
                        "type": "RIDGE",
                        "h": 87.0,
                        "lu": 254.44,
                        "x": -20.0,
                        "upwindSlope": 0.171,
                        "mh": 1.2433,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.2433,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 84.0,
                    "footprint": [
                        {
                            "lat": -33.834123,
                            "lng": 151.25611
                        },
                        {
                            "lat": -33.83404,
                            "lng": 151.256328
                        },
                        {
                            "lat": -33.834111,
                            "lng": 151.256367
                        },
                        {
                            "lat": -33.834194,
                            "lng": 151.25615
                        },
                        {
                            "lat": -33.834123,
                            "lng": 151.25611
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 85.5,
                    "footprint": [
                        {
                            "lat": -33.834258,
                            "lng": 151.256118
                        },
                        {
                            "lat": -33.834169,
                            "lng": 151.256282
                        },
                        {
                            "lat": -33.834217,
                            "lng": 151.25632
                        },
                        {
                            "lat": -33.834307,
                            "lng": 151.256156
                        },
                        {
                            "lat": -33.834258,
                            "lng": 151.256118
                        }
                    ]
                }
            ]
        },
        "northEast": {
            "md": 0.8,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.6,
                        "mzcat": 0.862,
                        "zones": [
                            {
                                "extent": 200.0,
                                "category": 3.0
                            },
                            {
                                "extent": 600.0,
                                "category": 2.5
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 0.0,
                        "hs": 0.0,
                        "bs": 0.0,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "EAST NORTH EAST",
                        "type": "ESCARPMENT",
                        "h": 83.5,
                        "lu": 163.57,
                        "x": 140.0,
                        "upwindSlope": 0.2552,
                        "mh": 1.2847,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.2847,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 86.5,
                    "footprint": [
                        {
                            "lat": -33.83425,
                            "lng": 151.256389
                        },
                        {
                            "lat": -33.834145,
                            "lng": 151.256814
                        },
                        {
                            "lat": -33.834217,
                            "lng": 151.256839
                        },
                        {
                            "lat": -33.834321,
                            "lng": 151.256415
                        },
                        {
                            "lat": -33.83425,
                            "lng": 151.256389
                        }
                    ]
                }
            ]
        },
        "east": {
            "md": 0.8,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 1.71,
                        "mzcat": 0.95,
                        "zones": [
                            {
                                "extent": 100.0,
                                "category": 3.0
                            },
                            {
                                "extent": 200.0,
                                "category": 2.0
                            },
                            {
                                "extent": 400.0,
                                "category": 2.5
                            },
                            {
                                "extent": 600.0,
                                "category": 1.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 9.0,
                        "bs": 26.07,
                        "ms": 0.8632
                    },
                    "topography": {
                        "critical": "EAST",
                        "type": "ESCARPMENT",
                        "h": 85.5,
                        "lu": 165.29,
                        "x": 100.0,
                        "upwindSlope": 0.2586,
                        "mh": 1.3151,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.3151,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 89.0,
                    "footprint": [
                        {
                            "lat": -33.834373,
                            "lng": 151.256624
                        },
                        {
                            "lat": -33.834244,
                            "lng": 151.256847
                        },
                        {
                            "lat": -33.834307,
                            "lng": 151.256899
                        },
                        {
                            "lat": -33.834436,
                            "lng": 151.256677
                        },
                        {
                            "lat": -33.834373,
                            "lng": 151.256624
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 90.0,
                    "footprint": [
                        {
                            "lat": -33.834494,
                            "lng": 151.256464
                        },
                        {
                            "lat": -33.834422,
                            "lng": 151.256596
                        },
                        {
                            "lat": -33.834496,
                            "lng": 151.256654
                        },
                        {
                            "lat": -33.834568,
                            "lng": 151.256522
                        },
                        {
                            "lat": -33.834494,
                            "lng": 151.256464
                        }
                    ]
                }
            ]
        },
        "southEast": {
            "md": 0.95,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.15,
                        "mzcat": 0.898,
                        "zones": [
                            {
                                "extent": 200.0,
                                "category": 3.0
                            },
                            {
                                "extent": 500.0,
                                "category": 2.5
                            },
                            {
                                "extent": 600.0,
                                "category": 1.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 1.0,
                        "hs": 9.0,
                        "bs": 54.69,
                        "ms": 0.8127
                    },
                    "topography": {
                        "critical": "EAST SOUTH EAST",
                        "type": "ESCARPMENT",
                        "h": 86.5,
                        "lu": 262.0,
                        "x": 60.0,
                        "upwindSlope": 0.1651,
                        "mh": 1.233,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.233,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 9.0,
                    "elevation": 90.0,
                    "footprint": [
                        {
                            "lat": -33.834892,
                            "lng": 151.25637
                        },
                        {
                            "lat": -33.834693,
                            "lng": 151.256732
                        },
                        {
                            "lat": -33.83464,
                            "lng": 151.256689
                        },
                        {
                            "lat": -33.834628,
                            "lng": 151.25671
                        },
                        {
                            "lat": -33.83458,
                            "lng": 151.256672
                        },
                        {
                            "lat": -33.834529,
                            "lng": 151.256764
                        },
                        {
                            "lat": -33.834889,
                            "lng": 151.257051
                        },
                        {
                            "lat": -33.834938,
                            "lng": 151.256961
                        },
                        {
                            "lat": -33.834922,
                            "lng": 151.256948
                        },
                        {
                            "lat": -33.834936,
                            "lng": 151.256923
                        },
                        {
                            "lat": -33.834959,
                            "lng": 151.256942
                        },
                        {
                            "lat": -33.835155,
                            "lng": 151.256586
                        },
                        {
                            "lat": -33.835077,
                            "lng": 151.256525
                        },
                        {
                            "lat": -33.835014,
                            "lng": 151.256641
                        },
                        {
                            "lat": -33.834996,
                            "lng": 151.256627
                        },
                        {
                            "lat": -33.834968,
                            "lng": 151.256678
                        },
                        {
                            "lat": -33.834903,
                            "lng": 151.256626
                        },
                        {
                            "lat": -33.834933,
                            "lng": 151.256573
                        },
                        {
                            "lat": -33.834919,
                            "lng": 151.256562
                        },
                        {
                            "lat": -33.834984,
                            "lng": 151.256444
                        },
                        {
                            "lat": -33.834892,
                            "lng": 151.25637
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 90.5,
                    "footprint": [
                        {
                            "lat": -33.835182,
                            "lng": 151.256453
                        },
                        {
                            "lat": -33.835138,
                            "lng": 151.256531
                        },
                        {
                            "lat": -33.835172,
                            "lng": 151.256558
                        },
                        {
                            "lat": -33.835216,
                            "lng": 151.25648
                        },
                        {
                            "lat": -33.835182,
                            "lng": 151.256453
                        }
                    ]
                }
            ]
        },
        "south": {
            "md": 0.9,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.15,
                        "mzcat": 0.898,
                        "zones": [
                            {
                                "extent": 100.0,
                                "category": 3.0
                            },
                            {
                                "extent": 400.0,
                                "category": 2.5
                            },
                            {
                                "extent": 500.0,
                                "category": 3.0
                            },
                            {
                                "extent": 600.0,
                                "category": 1.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 2.0,
                        "hs": 6.0,
                        "bs": 26.31,
                        "ms": 0.8327
                    },
                    "topography": {
                        "critical": "SOUTH SOUTH EAST",
                        "type": "ESCARPMENT",
                        "h": 87.5,
                        "lu": 271.67,
                        "x": 80.0,
                        "upwindSlope": 0.161,
                        "mh": 1.2233,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.2233,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 6.0,
                    "elevation": 92.0,
                    "footprint": [
                        {
                            "lat": -33.835114,
                            "lng": 151.255775
                        },
                        {
                            "lat": -33.834916,
                            "lng": 151.256127
                        },
                        {
                            "lat": -33.835126,
                            "lng": 151.256298
                        },
                        {
                            "lat": -33.835324,
                            "lng": 151.255945
                        },
                        {
                            "lat": -33.83525,
                            "lng": 151.255885
                        },
                        {
                            "lat": -33.835131,
                            "lng": 151.256097
                        },
                        {
                            "lat": -33.83508,
                            "lng": 151.256055
                        },
                        {
                            "lat": -33.835199,
                            "lng": 151.255843
                        },
                        {
                            "lat": -33.835114,
                            "lng": 151.255775
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 91.5,
                    "footprint": [
                        {
                            "lat": -33.835225,
                            "lng": 151.255587
                        },
                        {
                            "lat": -33.835183,
                            "lng": 151.255666
                        },
                        {
                            "lat": -33.835216,
                            "lng": 151.255693
                        },
                        {
                            "lat": -33.835188,
                            "lng": 151.255745
                        },
                        {
                            "lat": -33.835252,
                            "lng": 151.255795
                        },
                        {
                            "lat": -33.83527,
                            "lng": 151.255762
                        },
                        {
                            "lat": -33.835278,
                            "lng": 151.255768
                        },
                        {
                            "lat": -33.83527,
                            "lng": 151.255784
                        },
                        {
                            "lat": -33.835324,
                            "lng": 151.255825
                        },
                        {
                            "lat": -33.835311,
                            "lng": 151.255849
                        },
                        {
                            "lat": -33.835381,
                            "lng": 151.255904
                        },
                        {
                            "lat": -33.83541,
                            "lng": 151.25585
                        },
                        {
                            "lat": -33.83544,
                            "lng": 151.255874
                        },
                        {
                            "lat": -33.835484,
                            "lng": 151.25579
                        },
                        {
                            "lat": -33.835411,
                            "lng": 151.255733
                        },
                        {
                            "lat": -33.835421,
                            "lng": 151.255715
                        },
                        {
                            "lat": -33.835372,
                            "lng": 151.255677
                        },
                        {
                            "lat": -33.835362,
                            "lng": 151.255694
                        },
                        {
                            "lat": -33.835225,
                            "lng": 151.255587
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 91.5,
                    "footprint": [
                        {
                            "lat": -33.834857,
                            "lng": 151.256168
                        },
                        {
                            "lat": -33.834806,
                            "lng": 151.256259
                        },
                        {
                            "lat": -33.835095,
                            "lng": 151.256497
                        },
                        {
                            "lat": -33.835147,
                            "lng": 151.256405
                        },
                        {
                            "lat": -33.834857,
                            "lng": 151.256168
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 90.5,
                    "footprint": [
                        {
                            "lat": -33.834719,
                            "lng": 151.256038
                        },
                        {
                            "lat": -33.834525,
                            "lng": 151.256397
                        },
                        {
                            "lat": -33.8346,
                            "lng": 151.256456
                        },
                        {
                            "lat": -33.834795,
                            "lng": 151.256097
                        },
                        {
                            "lat": -33.834719,
                            "lng": 151.256038
                        }
                    ]
                }
            ]
        },
        "southWest": {
            "md": 0.95,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.7,
                        "mzcat": 0.854,
                        "zones": [
                            {
                                "extent": 300.0,
                                "category": 3.0
                            },
                            {
                                "extent": 600.0,
                                "category": 2.5
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 2.0,
                        "hs": 6.0,
                        "bs": 12.09,
                        "ms": 0.8957
                    },
                    "topography": {
                        "critical": "SOUTH SOUTH WEST",
                        "type": "RIDGE",
                        "h": 89.0,
                        "lu": 292.5,
                        "x": 40.0,
                        "upwindSlope": 0.1521,
                        "mh": 1.2086,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.2086,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 6.0,
                    "elevation": 93.0,
                    "footprint": [
                        {
                            "lat": -33.834908,
                            "lng": 151.255615
                        },
                        {
                            "lat": -33.834792,
                            "lng": 151.255826
                        },
                        {
                            "lat": -33.834766,
                            "lng": 151.255805
                        },
                        {
                            "lat": -33.834688,
                            "lng": 151.255941
                        },
                        {
                            "lat": -33.83481,
                            "lng": 151.256042
                        },
                        {
                            "lat": -33.835006,
                            "lng": 151.255689
                        },
                        {
                            "lat": -33.834908,
                            "lng": 151.255615
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 90.5,
                    "footprint": [
                        {
                            "lat": -33.835034,
                            "lng": 151.255481
                        },
                        {
                            "lat": -33.835019,
                            "lng": 151.255557
                        },
                        {
                            "lat": -33.835068,
                            "lng": 151.255571
                        },
                        {
                            "lat": -33.835072,
                            "lng": 151.255552
                        },
                        {
                            "lat": -33.835093,
                            "lng": 151.255558
                        },
                        {
                            "lat": -33.835104,
                            "lng": 151.255502
                        },
                        {
                            "lat": -33.835034,
                            "lng": 151.255481
                        }
                    ]
                }
            ]
        },
        "west": {
            "md": 1.0,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 2.9,
                        "mzcat": 0.838,
                        "zones": [
                            {
                                "extent": 200.0,
                                "category": 2.5
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 0.0,
                        "hs": 0.0,
                        "bs": 0.0,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "WEST NORTH WEST",
                        "type": "RIDGE",
                        "h": 35.5,
                        "lu": 350.0,
                        "x": 0.0,
                        "upwindSlope": 0.0507,
                        "mh": 1.0774,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.0774,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 89.5,
                    "footprint": [
                        {
                            "lat": -33.834505,
                            "lng": 151.255665
                        },
                        {
                            "lat": -33.834418,
                            "lng": 151.255824
                        },
                        {
                            "lat": -33.83447,
                            "lng": 151.255865
                        },
                        {
                            "lat": -33.834557,
                            "lng": 151.255706
                        },
                        {
                            "lat": -33.834505,
                            "lng": 151.255665
                        }
                    ]
                },
                {
                    "height": 3.0,
                    "elevation": 90.5,
                    "footprint": [
                        {
                            "lat": -33.83465,
                            "lng": 151.255513
                        },
                        {
                            "lat": -33.834601,
                            "lng": 151.255597
                        },
                        {
                            "lat": -33.834622,
                            "lng": 151.255615
                        },
                        {
                            "lat": -33.834628,
                            "lng": 151.255604
                        },
                        {
                            "lat": -33.834645,
                            "lng": 151.255619
                        },
                        {
                            "lat": -33.834688,
                            "lng": 151.255546
                        },
                        {
                            "lat": -33.83465,
                            "lng": 151.255513
                        }
                    ]
                }
            ]
        },
        "northWest": {
            "md": 0.95,
            "points": [
                {
                    "z": 5.0,
                    "terrain": {
                        "category": 3.0,
                        "mzcat": 0.83,
                        "zones": [
                            {
                                "extent": 100.0,
                                "category": 2.5
                            },
                            {
                                "extent": 600.0,
                                "category": 3.0
                            }
                        ]
                    },
                    "shielding": {
                        "ns": 0.0,
                        "hs": 0.0,
                        "bs": 0.0,
                        "ms": 1.0
                    },
                    "topography": {
                        "critical": "NORTH NORTH WEST",
                        "type": "RIDGE",
                        "h": 87.0,
                        "lu": 254.44,
                        "x": -20.0,
                        "upwindSlope": 0.171,
                        "mh": 1.2433,
                        "mlee": 1.0,
                        "mel": 1.0,
                        "mt": 1.2433,
                        "comment": null
                    }
                }
            ],
            "structures": [
                {
                    "height": 3.0,
                    "elevation": 79.5,
                    "footprint": [
                        {
                            "lat": -33.833895,
                            "lng": 151.255355
                        },
                        {
                            "lat": -33.833922,
                            "lng": 151.255213
                        },
                        {
                            "lat": -33.833993,
                            "lng": 151.255229
                        },
                        {
                            "lat": -33.833967,
                            "lng": 151.255371
                        },
                        {
                            "lat": -33.833895,
                            "lng": 151.255355
                        }
                    ]
                }
            ]
        }
    },
    "elevationData": null,
    "version": "2.0.0.0"
}

CHECKWIND.API now live

Our CHECKWIND web API is finally available to the public. Just enter the structure height and coordinates and it calculates everything you’ve come to expect: region, terrain categories, exposure categories, topography, shielding, wind speeds and pressures for six different international standards.

  • AS 4055
  • AS/NZS 1170
  • ASCE 7-10
  • ASCE 7-16
  • TIA-222-G
  • TIA-222-H
  • IS 875 (India – coming soon)
  • CSA S37 (Canada – coming soon)

CHECKWIND.API is currently free and open to the public for testing and feedback purposes. Get in touch and we’ll supply you with an API key to get started!