Stair Tread Riser Dimensions

These dimensions may be useful when laying out a staircase or if you have general questions about the size and shape of a traditional tread or a retro tread.

Stair tread riser dimensions.

Stairways guardrail and handrails. Width refers to the length of risers and treads from side to side. All risers and all goings in the same flight of stairs shall be of uniform dimensions within a tolerance of 5 mm. Standard stair tread dimensions.

The nosing is the protrusion at the edge of a tread that hangs over the riser below. Stair tread depths shall be 11 inches 279 mm minimum. As general rules of thumb for achieving comfortable relationships between riser and tread dimensions the following formulas can be used. Stair riser height and stair tread depth.

A uniform flight of stairs provides a safety factor. For code requirements the minimum staircase width is the horizontal dimension between the sidewalls of a staircase measured above the handrail s. 1910 25 d 3 have a minimum headroom above spiral stair treads of at least 6 feet 6 inches 2 m measured from the leading edge of the tread. Definition of detailed specifications for open riser stairs.

Details are at stair tread dimensions. The number of risers not the number of treads is used to determine the number of steps that comprise a staircase. Stair riser heights and stair tread depths should be within the parameters of the code to avoid any potential trip hazards for inconsistencies. Required 1 to 1 1 2 projection beyond the riser face.

Here is a drawing detailing our standard stair tread and riser dimensions. Stair riser heights shall be 7 inches 178 mm maximum and 4 inches 102 mm minimum. 1 or greater tread is supported by the riser. Tread inches 2x riser inches 24 25 26 for exterior stairs riser inches x tread inches 72 75.

The riser height shall be measured vertically between the leading edges of adjacent treads. Not all steps have a nosing but when. We would need change the stair tread depth to make a 37 slope stair that has an acceptable 7 inch riser height. Headroom is the vertical dimension from the stair treads to the ceiling directly above.

8 1 4 to 9 stair tread thickness. 7 riser height tread depth y 0 7535 37 slope. International building code for stair treads and risers 1009 3 stair treads and risers. Stair tread run or horizontal depth.

Building codes generally suggest that the maximum height of a riser be 7 75 inches 19 7 cm nosing. Inconsistencies or variations in risers or treads could interfere with the rhythm of the individual using. It is measured.