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  • What's Different About Commercial Decks - Professional Deck Builder Magazine
    The general rule for commercial -use stair runs is a minimum 11-inch run, measured from tread nosing to tread nosing (see illustration).
  • What is Fall Protection?
    Stairs: Uniform steps for stairs with maximum 7" risers and minimum 11" tread Stair nosings made of steel with rated slip resistance (no aluminum) Stair … … 2"x4", other "pinch grip" shapes or obstructive attachments) No winders in commercial stairs Adequate lighting Warnings …