: The two parallel beams provide superior stability, often used when a staircase lacks wall support or must accommodate a wide span.

A provides the precise architectural and structural blueprints required to construct a staircase supported by two parallel beams. Unlike minimalist mono-stringers, this "double" configuration distributes weight evenly on both sides of the treads, making it a robust choice for wider stairs or heavier loads. What is a Double Stringer Staircase?

: These designs are commonly executed in steel (using U-profiles or I-beams) or timber . Key Components in a DWG Detail

: Callouts for specific profiles, such as UPN steel profiles or heavy-duty timber joists.