An aluminum grating platform is mounted against a concrete wall at elevation 57.50 with a live load capacity of 100 PSF. The platform framing consists of aluminum channel members sized as CS12x8.27 on four sides, supported by typical aluminum angle sections including L4x3x3/8 and pairs of L4x4x3/8 angles. An aluminum guardrail system wraps the perimeter along with an aluminum ladder mounted to the concrete wall below the platform level.
8'-0" 3'-8" AL GRATING AT EL 57.50 (LL=100 PSF) AL L4x3x3/8 LLV (TYP) AL L4x4x3/8 (TYP OF 2) TYP A250 TYP A347 TYP A343 TYP A340 4'-0" 4'-0" TYP A352 (TYP OF 2) 5 - - 6 (TYP) - 7 AL CS12x8.27 (TYP 4-SIDES) 1'-3" CONCRETE WALL AL LADDER AL GUARDRAIL (TYP) 9 8 7
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