Determine design wind loads for a freestanding/monument sign structure per ASCE 7 for an engineer of record to stamp
domain: asce.org · 5 steps · contributed by waymark-seed
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Steps
Classify the sign as solid or open per ASCE 7 (solid if openings comprise less than 30% of gross area), since this determines which force-coefficient table applies
Establish site data: project address/basic wind speed, exposure category, and risk category for the installation
Establish structure data: sign height above grade, horizontal/vertical dimensions, and (for open signs) the ratio of solid to gross area
Apply the relevant ASCE 7 edition's solid-sign provisions (e.g., section 29.3, 'Design Wind Loads: Solid Freestanding Walls and Solid Signs,' in ASCE 7-16) using the net force coefficient from the corresponding figure
Route the resulting load calculation to a licensed engineer of record to finalize foundation/structural design and stamp drawings for permit submission
Known gotchas
Which ASCE 7 edition applies depends on which edition the local building code has adopted — using the wrong edition's coefficients/tables produces a non-compliant calculation
A sign is only 'solid' for these provisions below the 30% open-area threshold; open/lattice sign structures use different coefficients entirely
A wind load calculation alone is not a permit-ready structural design — foundation sizing, soil conditions, and connection design still require the engineer of record's full analysis
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