Chapter 2 of 521% of exam

Fabrication and Installation of Framing Systems

CSLB weights Fabrication and Installation of Framing Systems at about 21% of the C-17 exam: measurements and calculations, fabrication and installation of frames. This page is a short survey; the PrepPass C-17 Glazing study guide teaches the section with worked examples and a full practice exam at CSLB's weights.

Measure the opening

Measure widths and heights at three places and both diagonals; size from the smallest. Frame size is the rough opening less the perimeter joint on each side.

Square within 1/8 inch

Diagonals of an opening differ by no more than 1/8 inch in one manufacturer's guideline.

Pilkington ATS-192

Deflection

Glass-edge framing is limited to 1/175 of the edge length for edges up to 13 feet 6 inches.

2025 CBC §2403.3

Build the frame

Fabricate to shop drawings: dry-fit, seal joinery before assembly, drill weeps and keep setting blocks off them.

Seal before assembly

Sealant goes on member ends before the frame is assembled.

Manufacturer storefront checklist

Heat-treated glass

Drilling and notching are done before heat treatment; finished glass cannot be recut.

GANA FB45-14

Set the frame

Shim and brace before anchoring; separate aluminum from masonry, concrete and dissimilar metals; keep perimeter joints sealed with backer rod.

Shim then anchor

The specification says to shim and brace the aluminum system before anchoring it.

UFGS 08 41 13

Dissimilar materials

Aluminum touching masonry or concrete is separated by nylon pads or a bituminous coating.

UFGS 08 41 13

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