Precast concrete treads with integral aggregate warning stripes bear on structural supports as required, supported by steel stringers designated as STL-1. A guardrail designated as STL-3 is mounted alongside the stair assembly. A perforated metal soffit finishes the underside of the stair structure. Dimensions indicate standard tread depths of eleven inches with variable riser heights and specific clearances.
11" 2" 1" VARIES INTEGRAL AGGREGATE WARNING STRIPE PRECAST TREAD STRUCTURAL SUPPORT AS REQ'D PERFORATED METAL SOFFIT STL-3 GUARDRAIL 1/2" 3 1/2" 1 1/2" 3 1/2" 1/2" 3 1/2" 1/2" 1/2" 1/2" 1/2" STL-1 STRINGER
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