CHECKWIND v4.1.0 released

CHECKWIND v4.1.0 is now live and can be downloaded here. New features and enhancements include:

  • Updates to the Terrain Category (Mz,cat), Shielding Structures (Ms) and Exposure Category (Kz) detection algorithms to account for recent changes to Google’s map data format.
  • AS 4055: Override Shielding Classification to account for future developments and heavily wooded areas.
  • ASCE 7-10/ASCE 7-16/TIA-222-G/TIA-222-H: Updated ice wind speed maps for Puerto Rico, U.S. Virgin Islands, Guam and American Samoa.
  • ASCE 7-10/ASCE 7-16/TIA-222-G/TIA-222-H: Improved automatic Topography Factor (Kzt) calculation including an option to adopt Crown Castle reference ENG-PRC-10040 design methodology.
  • TIA-222-G/TIA-222-H: View average upwind terrain level in Topography Factor (Kzt) review dialog.

CHECKWIND v4.0.0 released

CHECKWIND v4.0.0 is now live and can be downloaded here. New features and enhancements include:

  • Choose between metric (mm, m, km, m², m/s, kPa) and imperial (in, ft, mi, ft², mph, psf) measurement units.
  • AS 4055: Automatic Wind Region detection.
  • AS 4055: Automatic Terrain Category detection.
  • AS 4055: Automatic Topographic Class detection.
  • AS 4055: Automatic Shielding Class detection.
  • AS/NZS 1170: Internal and net pressure calculation for building loads.

CHECKWIND v3.1.0 released

CHECKWIND v3.1.0 is now live and can be downloaded here. New features and enhancements include:

  • AS/NZS 1170: Topographic feature midpoints (Lu) are now determined using interpolation, leading to more accurate site Topographic Multipliers (Mt).
  • ASCE 7-10/ASCE 7-16/TIA-222-G/TIA-222-H: Topographic feature midpoints (Lh) are now determined using interpolation, leading to more accurate site Topographic Factors (Kzt).
  • Define water level for topography detection near inland lakes and rivers with surface levels above mean sea level.

CHECKPOLE v5.2.0 released

CHECKPOLE v5.2.0 is now live and can be downloaded here. New features and enhancements include:

  • Resolution of elevation points utilised for topography detection increased from 25 m increments to 10 m increments.
  • AS/NZS 1170: Topographic feature midpoints (Lu) are now determined using interpolation, leading to more accurate site Topographic Multipliers (Mt).
  • TIA-222-G/TIA-222-H: Topographic feature midpoints (Lh) are now determined using interpolation, leading to more accurate site Topographic Factors (Kzt).
  • Define water level for topography detection near inland lakes and rivers with surface levels above mean sea level.

CHECKWIND v3.0.0 released

CHECKWIND v3.0.0 is now live and can be downloaded here. New features and enhancements include:

  • Now optimised as a 64-bit application (no more pesky System.OutOfMemoryException errors).
  • New automated Topographic Multiplier (Mt) detection algorithm to AS/NZS 1170 (more on that below).
  • Users can now override Topographic Multiplier (Mt) values.
  • Introduction of our own Basic Wind Speed maps to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H.
  • Improvements to automated Exposure Category (Kz) detection to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H.
  • New automated Topographic Factor (Kzt) detection algorithm to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H based on Crown Castle and SEAW RSM-03 guidelines.

Topographic Multiplier (Mt) Detection Improvements

Until now, CHECKWIND has used a combination of the 500 m segment criteria from the AS/NZS 1170.2 commentary (though with a “rolling” 500 m segment instead of less accurate 500 m increments from the crest suggested by AS/NZS 1170.2), in addition to our own local minimum criteria to determine the base of a feature.

Figure 1: AS/NZS 1170.2 C4.4.2

However, the problem with utilising the local minimum criteria is that the base might be determined as being at the bottom of a valley with a steep slope for certain terrain, leading to overly conservative Mt values, as shown in Figure 2.

Figure 2: CHECKWIND v2.2.1 results

The local minimum criteria was intended to avoid situations where the 500 m segment might identify the “base” as being halfway up/down a slope, which seemed counter intuitive. Regardless, we’ve adjusted the algorithm and removed the local minimum criteria and now rely solely on the 500 m segment method. This has led to an overall reduction in Mt values across all of our test sites, as shown in Figure 3.

Figure 3: CHECKWIND v3.0.0 results

CHECKPOLE v5.1.0 released

CHECKPOLE v5.1.0 is now live and can be downloaded here. New features and enhancements include:

  • Now optimised as a 64-bit application (no more pesky System.OutOfMemoryException errors).
  • Monopole openings can now be viewed in section and elevation.
  • Improvements to Type 4 opening reinforcement.
  • New automated Topographic Multiplier (Mt) detection algorithm to AS/NZS 1170 (more on that below).
  • Users can now override Topographic Multiplier (Mt) values.
  • Introduction of our own Basic Wind Speed maps to TIA-222-G and TIA-222-H.
  • Improvements to automated Exposure Category (Kz) detection to TIA-222-G and TIA-222-H.
  • New automated Topographic Factor (Kzt) detection algorithm to TIA-222-G and TIA-222-H based on Crown Castle and SEAW RSM-03 guidelines.
  • Improvements to fatigue design to AASHTO 2013.

Topographic Multiplier (Mt) Detection Improvements

Until now, CHECKPOLE has used a combination of the 500 m segment criteria from the AS/NZS 1170.2 commentary (though with a “rolling” 500 m segment instead of less accurate 500 m increments from the crest suggested by AS/NZS 1170.2), in addition to our own local minimum criteria to determine the base of a feature.

Figure 1: AS/NZS 1170.2 C4.4.2

However, the problem with utilising the local minimum criteria is that the base might be determined as being at the bottom of a valley with a steep slope for certain terrain, leading to overly conservative Mt values, as shown in Figure 2.

Figure 2: CHECKPOLE v5.0.7 results

The local minimum criteria was intended to avoid situations where the 500 m segment might identify the “base” as being halfway up/down a slope, which seemed counter intuitive. Regardless, we’ve adjusted the algorithm and removed the local minimum criteria and now rely solely on the 500 m segment method. This has led to an overall reduction in Mt values across all of our test sites, as shown in Figure 3.

Figure 3: CHECKPOLE v5.1.0 results

CHECKWIND v2.2.0 released

CHECKWIND v2.2.0 is now live and can be downloaded here. New features and enhancements include:

  • Simplification of building structure inputs – “h” now represents the average roof height. CHECKWIND data files created using previous versions will calculate this value automatically.
  • View building footprint overlay by holding mouse button down on map before setting location by double-clicking.
  • Improved Design Reference detection.
  • Licencing improvements.

CHECKWIND v2.1.0 released

CHECKWIND v2.1.0 is now live and can be downloaded here. New features and enhancements include:

  • Improved Terrain Category detection to AS/NZS 1170.
  • Lee zone maps for New Zealand now exactly match NIWA recommendations.
  • Improved Topographic Multiplier (Mt) results to AS/NZS 1170.
  • Improved Exposure Category detection to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H.
  • Improved Topographic Factor (Kzt) results to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H.

CHECKPOLE v5.0.0 released

CHECKPOLE v5.0.0 is now live and can be downloaded here. New features and enhancements include:

  • Introduction of base plate gussets.
  • Introduction of TIA-222-H.
  • Automated Terrain Category and Terrain/Height Multiplier (Mz,cat) detection to AS/NZS 1170.
  • Automatic shielding structure detection for the Shielding Multiplier (Ms) to AS/NZS 1170.
  • Lee zone maps for New Zealand now exactly match NIWA recommendations.
  • Improved automated Topography Multiplier (Mt) calculation to AS/NZS 1170.
  • Automated Exposure Category and Velocity Pressure Coefficient (Kz) detection to TIA-222-G and TIA-222-H.
  • Improved automated Topography Factor (Kzt) calculation to TIA-222-G and TIA-222-H.
  • Automated ice loading to AS/NZS 1170, TIA-222-G and TIA-222-H.
  • CSA S37 steel design.
  • Reductions in ancillary area loads of up to 20% utilising TIA-222-H provisions.
  • Improved base plate design resulting in higher capacities.
  • Users will only be prompted to save an existing file if changes have been made.

CHECKWIND v2.0.0 released

CHECKWIND v2.0.0 is now live and can be downloaded here. New features and enhancements include:

  • Automated Terrain Category and Terrain/Height Multiplier (Mz,cat) detection to AS/NZS 1170.
  • Automated Exposure Category and Velocity Pressure Coefficient (Kz) detection to ASCE 7-10, ASCE 7-16, TIA-222-G and TIA-222-H.
  • New “Viewer” mode for unlicenced users to explore sample files.
  • New “Options” menu enables users to quickly change between Simple and Advanced interfaces.
  • Override Directional Multiplier (Md) to AS/NZS 1170.
  • Generate site reports for both “BUILDING” and “OTHER” structure types.
  • Users will only be prompted to save an existing file if changes have been made.