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Swanson Group Mfg. LLC (8140-2137:0502)

This is a listed siding assembly. Listing 8140-2137:0502. This site cites sfm-12-7a-1. Match the model and orientation. A listing is not a permit.

Douglas-fir Front and Back Veneer Plywood, nominal 19/32" thick with 12" or 16" groove lengths RBB, direct-attached. Panel is a 5-ply, 5-layer 19/32" plywood system with front, back, and center veneers of Douglas-fir, in sizes 4' x 8', 4' x 9', or 4' x 10'. Installed on nominal 2" x 4" studs, 16" O.C. or 24" O.C. Siding was fastened to the studs at 6" spacing on edge and 12" spacing in the field with 6d nails. Refer to manufacturer's installation instructions and product data sheets.

Kind: listed-assembly. Brand: Swanson Group Mfg. LLC. Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-23. JSON (CC BY 4.0)

Documented attributes

Each value below points to its field-level manufacturer, official-listing, test-report, or standard-body evidence.

AttributeValueEvidence source
Test standard sfm 12 7a 1 OSFM Building Materials Listing — 8140-2137:0502 (official-listing · Listing 8140-2137:0502, TEST PROTOCOL)

Published requirement matches

These links are generated from the cited attributes above. They do not decide installation or a project result.

ProgramID / sourceEvidence dateExpiresStatus
CAL FIRE BML 8140-2137:0502 · Search BML for 8140-2137:0502 2026-08-25 2027-06-30 listed

Tests and programs cited

Sources

Swanson Group Mfg. LLC (8140-2137:0502). FireApproved. https://fireapproved.com/materials/swanson-group-mfg-llc-8140-2137-0502/. Last verified 2026-08-23.