NHLBI Site Ceiling Clearances.pdf

This document is a structural engineering plan sheet for a partial first floor reflected ceiling plan, drawn at a scale of 1/8" = 1'-0" (1:100). The plan illustrates the layout of steel beams and floor systems for what appears to be a multi-story building project, with sections labeled R, S, S.4, XX, and T across rows numbered 26 through 32.

The plan identifies specific steel beam designations using AISC (American Institute of Steel Construction) standards, with metric equivalents provided. Key beam types shown include W8x15 (W200x19 metric equivalent, 3.928 m or 12'-10.8"), W14x22 (W360x33, 3.786 m or 12'-5.1"), W21x44 (W530x66), W21x57 (W530x85), W24x55 (W610x82, 3.534 m or 11'-7.1"), and W18x40 (W460x60). The floor slab is noted as 4.132 m or 13'-6.7". Critical clearance requirements are specified: 25 mm clearance from the ground floor slab to accommodate future beam deflection, plus an additional 25 mm clearance for connections. The plan recommends a total tolerance of 1 inch plus an additional 1 inch for roof deflection. All dimensions are required to be verified in the field prior to construction work commencement.