Top connection: How the stringer anchors to the upper floor ledger beam.
Clean separation between structural steel layers, dimensions, hatching, and text annotations. double stringer staircase detail dwg
| Criterion | Central (Mono) Stringer | Double (Dual) Stringers | |---|---|---| | | Modern, minimalist, "floating" | Versatile: industrial, classic, or modern | | Structural Stability | Requires precision engineering; single beam carries all load | Load is shared across two supports, providing high rigidity | | Tread Compatibility | Ideal for thick solid wood or folded metal | Maximum compatibility (wood, metal, glass, concrete) | | Installation | More technical and time-consuming | Simpler and faster | | Span & Curves | Requires robust steel for long spans; curved designs demand advanced engineering | Easier to engineer across long runs and sweeping curves | Top connection: How the stringer anchors to the
The structural design of stringers, treads, and their connections is left to a qualified engineer, and the code does not provide prescriptive design tables for them. However, some common approaches are widely used: However, some common approaches are widely used: