This assembly consists of MC 12-inch by 10.6-pound steel channel stringers and landing supports with a galvanized finish. The treads and landing are constructed from 1 1/4-inch by 3/16-inch flat bar grating, also galvanized. The railing system utilizes 1 1/2-inch outside diameter pipe rails and tubes. The design incorporates specific safety clearances, including a 4-inch diameter sphere restriction for the railing and a 4 3/8-inch diameter sphere restriction for the stair geometry. The stair connection to the floor is bolted, with specific structural requirements referenced for the attachment.
1 1/2" DIA. O.D. TUBE 1 1/2" DIA. PIPE RAIL MC 12"X10.6 STRINGERS AND LANDING - GALVANIZED FINISH SEE STRUCTURAL 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 SEE STRUCTURAL 4" DIA. SPHERE SHALL NOT PASS THROUGH 4 3/8" DIA. SPHERE SHALL NOT PASS THROUGH 27" MAX 4" MIN. 7" MAX. N.T.S A401 3 STAIR TO FLOOR ATTACHMENT - TYP.
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