Thickness Of Stair Risers

In a given run of stairs the greatest step height and the smallest step height should not vary more than 3 8 inch 9 5 mm.

Thickness of stair risers.

Designed for interior use our tread can be stained to match other stair parts or surrounding decor. Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall. Thick stair treads are often used in open rise staircases where there is only one supporting stringer. A stair riser is the back vertical part of a step.

Step riser specifications riser height 7 75 or in some codes 7 0 or in canada 8 25 maximum and 4 inches 102 mm minimum. According to general specifications your stair riser thickness should be no less than. Unfinished the surewood lnl 48 in. 7 5 in x 48 in unfinished red oak wood stair riser.

The following user says thank you to greg24k for this useful post. Maximum 7 3 4 inch stair riser height. If you need a size or species you don t see listed here please contact us for a quote. Thickness in natural unfinished red oak.

This is not the case for open riser staircases. I never lost a cent on the jobs i didn t get. Staircase riser height translates to the distance you move your foot either up or down from one step to an adjacent step. Maximum 12 3 vertical height rise for a flight of stairs.

Open risers with openings more then 30 inches 762 mm vertical to the floor should not permit the passage of a 4 inch diameter 102 mm sphere. This type of staircase requires a stair tread thicker than the standard 1. Most stair companies use 1 1 16 industry standard tread thickness. Unfinished oak stair treads have a 1 in.

This should be no more than 7 3 4 inches. In fact many professionals recommend risers with a thickness of. Code states that this should not be greater than 7 3 4 inches 194 mm. This means your stair risers should be less than or equal to 7 3 4 inches.

Building codes limit variation to 3 8 10 mm the underside of risers should be sloped or have a 60 angle minimum between nosings and the horizontal surface open risers are not allowed under ada guidelines. Handrail height to be placed a minimum 34 inches to 38 inches. Riser and tread dimensions should be continuously uniform for safety. 7 3 4 inches maximum.

We can make these thicker stair treads in most species and colors. Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing.