The foundation of any staircase DWG is the geometry. The drafter must determine the "Going" (run) and "Rise" based on the floor-to-floor height.
Standard Formulas:
DWG Implementation: In the CAD environment (AutoCAD, Revit, etc.), the drafter creates a "Rise/Run" array. The stringer is drawn as a line extruded at a specific pitch angle. The accuracy of this angle is critical; a deviation of even 1 degree can result in the stringer missing the landing connection by several centimeters over a long flight.
| Material | Width (mm) | Depth (mm) | Thickness (mm) | |----------|------------|------------|----------------| | Steel C-channel | 150–200 | 200–250 | 6–10 | | Steel plate (cut) | 200–300 | 250–350 | 10–16 | | Concrete (cast) | 200–250 | 250–300 | n/a | | Wood LVL | 90–140 | 240–300 | n/a |
In AutoCAD, use Dynamo or AutoLISP routines to generate double stringer stairs parametrically. For Revit users: model a stair by component, then export to DWG – it automatically generates stringer families.
The "story" of a double stringer staircase is one of transition from hidden support to architectural centerpiece. While traditional stairs often hide their structure behind walls, the double stringer design celebrates engineering by putting the "skeleton" on display. The Evolution of the Double Stringer double stringer staircase detail dwg
Historically, grand staircases used massive stone or timber to impress guests. However, the modern double stringer—characterized by two parallel beams supporting treads from the sides or underneath—emerged as a way to combine transparency with strength.
A double stringer staircase is a structural design characterized by two parallel longitudinal beams (stringers) that support the stair treads. Unlike a mono-stringer, which uses a single central support, a double stringer system distributes the load to the edges or set-in points of the treads, offering superior structural stability and a classic, robust aesthetic. 1. Structural Anatomy and Materials
The primary components of a double stringer staircase include:
Stringers: These can be made from steel (using C-channels, UPN profiles, or rectangular tubes) or wood (typically 2x12 lumber).
Treads: The horizontal walking surfaces, which can be "concealed" within the stringer depth or "raised" on top of them. The foundation of any staircase DWG is the geometry
Connections: Critical DWG details must show the baseplate floor connection, top floor supporting beam connection, and any intermediate landing supports. 2. Standard Design Dimensions
To comply with international building codes (like ISO 21542 or ADA), specific measurements are required in any technical DWG:
When designing a modern interior, the double stringer staircase
is a go-to for architects looking for a balance between industrial strength and minimalist aesthetics. Unlike mono-stringers, the dual-beam support offers increased stability and allows for wider tread spans without the bounce often associated with single-support designs. Key Technical Details in a DWG File A professional-grade double stringer staircase detail DWG
typically includes several critical components for construction and fabrication: Stringer Profiles DWG Implementation: In the CAD environment (AutoCAD, Revit,
: Often specified as steel channels (e.g., UPN260 or MC shapes) or rectangular hollow sections (HSS). The drawing will detail the specific pitch and cut of these beams. Tread Support Brackets
: Details on how the treads are mounted—whether they are "raised" on top of the stringers or "concealed" between them for a sleeker profile. Structural Connections
: Precise details of the top floor main beam connection and the ground floor foundation or starter plate. Material Transitions
: Specifications for the interface between the steel stringers and wooden or glass treads. Architectural Gallery
These visual references showcase various double stringer configurations, ranging from heavy timber frames to sleek, laser-cut steel designs.