WindCode Calculator for Commercial Doors

Selection of your Code enforcement body will determine which version of ASCE 7 is used to calculate your design pressure.

ASCE 7-05 is used for the following Code Enforcement Bodies:
Texas Department of Insurance
IBC 2009
IBC 2006
IBC 2003
ASCE 7-10 is used for the following Code Enforcement Bodies:
IBC 2015
IBC 2012
ASCE 7-16 is used for the following Code Enforcement Bodies:
Texas Department of Insurance
Miami-Dade County
Florida Building Code
IBC 2021
IBC 2018

Codes based on ASCE7-05 use “basic” wind speed and a load combination adjustment factor of 1.0.

Codes based on ASCE7-10 & ASCE7-16 use "ultimate" wind speed and load combination adjustment factor of 0.6.

This calculator has already accounted for the load reduction factor for ASCE7-10 and ASCE7-16 loads.

For more information on windspeed, visit https://hazards.atcouncil.org

Exposure Categories defined by ASCE 7-05: Exposure B: Urban and suburban areas, wooded areas Exposure C: Flat open country, grasslands, all water surfaces in hurricane-prone regions Exposure D: Flat, unobstructed areas and water surfaces outside hurricane-prone regions

Exposure Categories defined by ASCE 7-10/16: Exposure B: Urban and suburban areas, and wooded areas Exposure C: Flat open country, and grasslands Exposure D: Flat unobstructed areas, and water surfaces including hurricane-prone regions

Only applicable for ASCE7-16.

Building Width and Height inputs are interchangeable.

Building Width and Height inputs are interchangeable.

The Mean Roof Height is the average of the roof eave height and the height of the highest point on the roof surface, except the eave height shall be used for roof slopes less than 10 degrees or 2.1:12.

Maximum Calculated Mean Roof Height is 60 feet. Please contact the Engineer of Record for calculations involving building greater than 60 feet.

This calculator uses the equations from ASCE 7 supplements to calculate the Kz values for Exposures C and D (and B for MRH >30). These can be looked up from the tables (available in ASCE 7) and interpolated from those values. The interpolated values are slightly more favorable (ie, slightly lower) that the values from the equations.

Select ENCLOSED if not located within a wind-borne debris region and after consulting with a licensed design professional.

Please be aware that the calculations will be the same for both "Partially Open" & "Partially Closed" building designations.

Select 1.15 if building represents hazard to human life or is an essential facility. Examples include but are not limited to schools, health care facilities, jails, fire and police stations, power generating facilities, aviation control centers, etc.

The calculator uses a reduced effective area for doors over 20’ wide and doors over 10’ tall. Some jurisdictions in south Florida use an even more restrictive definition of effective area. Please seek guidance from your local Authority Having Jurisdiction on oversized doors.

Please be aware that this dimension requires only the opening’s width, not including any overlap of the door over the jamb.