Standard Stair Riser And Tread Dimensions

Regulated by building codes stair details specify the sizes of risers and treads stair widths the placement of handrails and guardrails and construction methods for fabricating stairs.

Standard stair riser and tread 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. All risers and all goings in the same flight of stairs shall be of uniform dimensions within a tolerance of 5 mm. This free stair calculator determines stair parameters such as rise total run and angle stringer length based on height run tread and headroom requirement. Inconsistencies or variations in risers or treads could interfere with the rhythm of the individual using the stairs.

Stair riser heights and stair tread depths should be within the parameters of the code to avoid any potential trip hazards for inconsistencies. The stair calculator is used for calculating stair rise and run stair angle stringer length step height tread depth and the number of steps required for a given run of stairs. Here is a drawing detailing our standard stair tread and riser dimensions. Stair width fixed stairways shall have a minimum width of 22 inches.

The tread depth td is to be 185mm and it should not be more than 30mm shorter than the going g. 4 step riser height uniformity 3 8 variation between successive step surfaces or in some codes 3 16 4 8 mm. A uniform flight of stairs provides a safety factor. For convenience and flexibility this stair stringer calculator comes in two forms the automatic and manual click on the icons to determine the best calculator to use for your stairs.

Stair details refer to the standard requirements for each of the various components of a flight of stairs. Standard stair tread dimensions. Critical measurements such as standard stairway width riser height and tread depth are not a matter of guesswork when you are remodeling or building a home staircase measurements are determined by common practice and by building code which itself is often informed by generally approved practices these rules are aimed at making staircases as safe as possible so they should never be ignored. Application this section covers all stairways including standard spiral ship and alternating tread type stairs except for articulated stairs stairs that change pitch due to change in height at the point of attachment such as those serving floating roof tanks stairs on scaffolds stairs designed into machines or equipment and stairs on self propelled motorized equipment.

1910 24 e angle of stairway rise fixed stairs shall be installed at angles to the horizontal of between 30 deg. Stair riser heights the riser height shall be measured vertically between the leading edges of adjacent treads.