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By clicking below, you agree that the use of this design aid is for estimating purposes only. Results are not valid for use & no construction or design shall be performed without the review and certification by a registered professional engineer.
No warranty or guarantee whatsoever is offered with any results obtained herein.
This calculator determines site-specific wind pressures for rooftop equipment based on site-specific conditions and unit information.
This calculator is for estimating purposes only and NOT for permit use. Results are only valid when reviewed, signed, and sealed by a Professional Engineer from Engineering Express. Click “Order Certified Results” to order a review and certification delivered to you for permit.
See calculator support page for explanations, examples, limitations & conditions of use.
Mobile Users: Please tilt phone horizontally for optimal experience. (Calculator works best on a wider screen.)
Calculations are based on ASCE 7-16 Section 29.4.1 Design Wind Loads: Other Structures: Rooftop Equipment and Structures for Buildings. Calculations are valid for: ASCE 7-10 & 7-16, FBC 2017 & 2020, and IBC 2012, 2015, & 2018.
Rooftop Equipment Wind Pressure Calculator