| Parameter | Typical Requirement (IBC / IRC) | | :--- | :--- | | Riser height | Maximum 7¾ inches (196 mm) – often 7 inches for residential | | Tread depth | Minimum 10 inches (254 mm) – often 11 inches for comfort | | Stairway width | Minimum 36 inches (914 mm) | | Headroom | Minimum 6 feet 8 inches (2032 mm) | | Landings | Minimum 36 inches in direction of travel; required if total rise exceeds 12 feet | | Handrail height | 34–38 inches above tread nosing | | Stringer spacing | Cut stringers spaced no more than 18 inches on centre | | Throat size | Minimum 5 inches for cut stringers |
Every double stringer staircase detail DWG must comply with local building codes. While specific code requirements vary by jurisdiction, the following are common standards found in the International Building Code (IBC) and similar model codes:
A-STAIR-RAIL : Handrails, guardrails, and balusters (Continuous, Medium weight).
A minimum clear height of 6 feet 8 inches measured from the tread nosing to the ceiling overhead. double stringer staircase detail dwg
In terms of positioning, dual stringers offer exceptional versatility—they can be placed in the centre of the stairs or along the sides, making them compatible with almost any compliant tread design, which is especially useful for outdoor stairs such as deck access.
The DWG drawing includes the following views:
Create dynamic CAD blocks for your tread brackets. This allows you to quickly alter the pitch, riser height, and tread depth of the stair assembly across varying projects without redrawing individual components. | Parameter | Typical Requirement (IBC / IRC)
3/4 inch to 1-1/4 inches if open risers are used.
A complete, construction-ready DWG file must look beyond a basic side profile. To be highly functional for fabricators, ensure your file contains the following detailed views and callouts: A. Base Connection Detail (Footing)
What are you drafting in? (AutoCAD, Revit, or Rhino?) In terms of positioning, dual stringers offer exceptional
3-story atrium staircase for a tech office in Austin, TX. Spec: 48" wide open steel double stringer, 14 risers, 16-foot span. Challenge: The architect wanted a "floating" look, but the building code required a 300 lbs/sq ft live load.
Apply a standard ANSI31 or AR-CONC hatch pattern to concrete slab intersections to differentiate structural materials cleanly.
Explicitly label material grades (e.g., A36 Steel) and finish requirements (e.g., Matte Black Powder Coat). Safety and Compliance Considerations
Q: Can I use a double stringer staircase detail DWG for a curved staircase? A: While a double stringer staircase detail DWG can be used as a starting point for a curved staircase, it may require modifications and additional calculations to ensure accuracy and safety.
Determine whether you need a drawing for a , concrete (reinforced) , or steel (MS) staircase. Mild steel staircases are popular for their strength, durability, and flexibility, and they are used in both interior and exterior applications. Concrete two-stringer stairs remain the most common type in many regions.