The two primary load-bearing beams running diagonally from the lower floor to the upper landing. They are commonly made from structural steel channels (C-channels), rectangular hollow sections (RHS), or plate steel.
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The stringers remain straight, solid diagonal beams. Treads are mounted via welded interior cleats or brackets, keeping the outer side of the beam perfectly smooth. 2. Under-Tread (Centered) Double Stringers The two primary load-bearing beams running diagonally from
The steel plate is cut in a zigzag pattern matching the rise and run. The treads sit flat on top of these cuts. Treads are mounted via welded interior cleats or
In this layout, the two stringers are moved inward from the edges of the steps. The treads overhang the stringers on both sides, creating a striking "floating" visual effect. This layout minimizes visible structural steel from side profiles. 2. Side-Mounted (Exposed) Stringers
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