The aluminum storefront frame is set directly into a bed of mastic sealant atop the interior concrete slab. A weather gasket is installed at the base of the frame to provide a seal against the threshold. A one-half inch fiberboard expansion joint with sealant is positioned in the concrete slab immediately adjacent to the storefront threshold. The aluminum frame is shown beyond the primary section plane, maintaining a total width of four and one-half inches at the threshold assembly.
WEATHER GASKET INTERIOR CONCRETE SLAB ALUMINUM FRAME BEYOND 4 1/2" 1/2" FIBERBOARD EXP. JNT. & SEALANT SET THRESHOLD IN MASTIC SEALANT
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