Sign Attachment Review Tool

Preliminary wind and dead-load hardware screening, plus electrical and energy-code scope identification.

Use limitation: Fastener capacities are draft values supplied for screening, not verified manufacturer allowable loads. This calculator divides total wind and dead load by the selected nominal capacity. It does not verify anchor group effects, edge distance, spacing, substrate failure, embedment, prying, bracket geometry, load combinations, or a complete CBC Chapter 16 design. Project-specific engineering and product data may be required.

1. Sign and attachment inputs

Sign / location

Projected sign area (sq ft)

Offset from wall to sign load plane (in.)

Wind pressure (psf)

Sign assembly dead load (lb)

Mounting configuration

Supporting substrate

Attachment hardware

Fastener quantity shown on plans (optional)

20 psf is the approximate screening pressure from the supplied note (q ≈ 16 psf × GC ≈ 1.25), intended only for flush-mounted signs with shallow projection. Enter a project-specific pressure where the approximation is not applicable.

2. Wind and dead-load hardware checks

Total wind force

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Area × wind pressure

Total dead load

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Sign assembly weight

Wind-based quantity

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Wind force ÷ capacity

Dead-load quantity

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Dead load ÷ capacity

Selected capacity / fastener

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Governing estimated quantity

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Offset moment from wind

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Wind force × offset

Plan quantity comparison

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3. Electrical and energy-code requirements

Does the sign have electrical service / illumination?

Project / energy-code scope

Is sign lighting subject to California Energy Code?

The energy-code form reference is the current NRCC-LTS-E sign-lighting Certificate of Compliance for the 2025 Energy Code. Confirm the applicable code cycle and whether the sign lighting is within scope before requiring the form.

SitePlanAce • Sign attachment screening worksheet • Verify adopted code edition, local amendments, project criteria, and manufacturer / engineering data.