This galvanized steel stair assembly features metal plate or channel stringers supporting 1 1/4" by 3/16" flat bar grating treads and landings. The stair connection is bolted with a steel angle to the supporting concrete structure. A 1 1/2" outside diameter tube and 1 1/2" pipe rail form the guardrail system, maintaining a minimum height and complying with the 4" and 4 3/8" sphere passage requirements for safety.
1 1/2" DIA. O.D. TUBE, GALVANIZED 1 1/2" DIA. PIPE RAIL, GALVANIZED METAL PLATE OR CHANNEL STRINGER, GALVANIZED MIN. 1'-0" 3'-6" 3'-0" 1 1/2" 1 1/4" X 3/16" FLAT BAR GRATING AT LANDING AND TREADS, GALVANIZED FINISH BOLT STAIR CONNECTION W/ STEEL ANGLE 4" DIA. SPHERE SHALL NOT PASS THROUGH 4 3/8" DIA. SPHERE SHALL NOT PASS THROUGH 27" MAX A2 A401
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