Net uplift and design pressures for rooftop and ground-mount solar arrays under ASCE 7-22 §29.4 — GCrn pressure equivalents, tilt, edge factors, parapet effects, and attachment uplift. Launching soon.
Panels are not just another roof component. The calculator follows the §29.4 path purpose-built for tilted arrays.
Rooftop arrays use the nominal net pressure coefficient method. The tool resolves GCrn from your tilt, chord length, and array geometry into design pressures per panel zone.
Corner and edge panels see the highest pressures. Parapet height relative to panel height changes the exposure. The tool factors both so the governing panels surface.
Ground-mount and elevated racking use the applicable open-structure provisions for net pressures across the panel surface. Output resolves to per-attachment and ballast demand.
The same guided flow as our live calculators, tuned for solar arrays.
Automatic design wind speed from the project address. Florida overrides built in.
Roof height, parapet, panel tilt, chord, and setback from the edge.
GCrn-based net pressures computed per panel zone, both directions.
Permit-ready output with cited coefficients and zone diagrams.
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Size racking, attachments, and ballast against the governing wind pressures before you order hardware.
Run §29.4 array pressures fast, with every GCrn value traced to its ASCE 7-22 section for the permit set.
Verify product allowables against required pressures across tilt angles, roof zones, and exposure categories.
Check submitted solar loads against a clear, cited Engineering Report instead of opaque spreadsheets.
Confirm array layouts and setbacks early so wind demand does not force a redesign at permit.
Catch attachment and ballast issues before the crew is on the roof and the schedule is at risk.
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Components & cladding for vertical walls and openings.
All roof configurations and slopes (C&C analysis).
Full MWFRS analysis — directional & envelope methods.
Rooftop solar panels are addressed by ASCE 7-22 Section 29.4, which gives nominal net pressure coefficients (GCrn) for panels on flat and low-slope roofs. Ground-mount arrays use the open-structure and other-structure provisions. The calculator applies the correct path based on your configuration.
Tilt angle, chord length, and distance from a roof edge all change the pressure. Section 29.4 uses array edge factors and normalized wind area to capture corner and edge amplification. Steeper tilts and edge rows see higher uplift, which the tool computes per panel zone.
Yes. Rooftop arrays follow Section 29.4 GCrn pressure equivalents. Ground-mount and elevated racking are evaluated with the applicable open-structure provisions for net pressures across the panel surface, including exposed rear faces.
The output gives net uplift pressures you can resolve to per-attachment forces or required ballast weight. You confirm the spacing and the racking capacity; the calculator supplies the governing design pressures and zone-by-zone demand.
Parapet height relative to panel height changes exposure and can shelter or accelerate flow. The tool factors parapet effects and roof edge zones into the GCrn selection so perimeter and corner panels are not under-designed.
An Engineering Report with the wind speed, exposure category, roof and panel geometry, GCrn values cited to their ASCE 7-22 section, and zone diagrams. PE sign-and-seal is available nationwide through our licensed engineer network on request.
Yes. PE sign-and-seal is offered in all 50 states through the firm's network of licensed professional engineers, routed by project location and scope. The software produces the Engineering Report; sealing is a separate professional service.
It is in active development now. Join the notify list and you will be first to know when it goes live, with early access ahead of general release. No payment is taken until the calculator ships.
The Solar Panels calculator is in active development. Join the notify list for early access, or run our free wind speed lookup in the meantime.