The drawing details a concrete tunnel or pit assembly incorporating reinforced concrete slabs and vertical retaining or booth walls. A waterproof membrane and insulation layer wrap around the exterior of the concrete elements to protect against moisture and thermal transfer. Reinforcing steel rebar schedules and concrete dimensions (such as 650mm, 1165mm, and 150mm thicknesses) are indicated throughout the section.
Text on the drawing
T.O MAIN FLOOR 1165 650 100 INSULATION SEE ARCH, TYP WATERPROOF MEMBRANE SEE ARCH, TYP 150
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