Preliminary exposure-adjusted velocity pressure.
Wind · snow · span
Nationwide Pergola Load Screening
Enter the site-specific wind speed and ground snow load from an authoritative local source. The tool calculates transparent preliminary pressures and carries the inputs into your quote request.
Screening only—not structural approval. Results do not verify a product, beam, connection, anchor, slab, footing, or site. Final design depends on the adopted code, exact location, risk category, exposure, topography, drift, roof coefficients, load combinations, section properties, connections, and local authority requirements.
Get location-specific hazard values
Use the ASCE Hazard Tool or the local building authority; a ZIP code alone is not precise enough for design.
Open ASCE Hazard Tool ↗Use the ASCE Hazard Tool or the local building authority; a ZIP code alone is not precise enough for design.
Conservative routing value, not a component rating.
Simple 0.7pg screen; drift and unbalanced snow omitted.
Footprint used for project scoping.
No pass/fail is issued without verified section and connection calculations.
Send the inputs with your product request.
How to use the output
A Routing Tool, Not a Permit Package
Wind
The calculator converts basic wind speed into a preliminary velocity pressure using stated exposure assumptions. It does not determine final roof pressure coefficients, internal pressure, torsion, or load combinations.
Snow
The simple balanced-roof screen does not include drift, sliding snow, rain-on-snow, unbalanced loading, thermal conditions, exposure factors, or jurisdiction-specific maps.
Span
The entered span is preserved for review. Actual capacity requires verified alloy temper, section properties, bracing, connections, deflection limits, anchors, and foundation conditions.