STAIR ANGLE GUIDE
Angled stair railing can be tricky to measure and install. Commonly the standard stair angle varies between 30º and 45º. Egress stairs have a shallower angle around 30-35 degrees while industrial stairs have steeper angles ranging from 40 to 70 degrees. We have a handy stair angle chart listed below for a more visual representation of how to measure stair railing angles. If using angle washers like our HAAS Stainless Angle Washer, choose the angle washer with the angle that most closely matches your stairs.
The handrail height should be at least 34 inches and not more than 38 inches. In the United States, stairways should be at least 36 inches wide, measured at all points above the handrail height and below the required headroom height. The minimum stair riser height is 4 inches, and minimum tread depth is 10 inches. Every landing should be at least 36 inches wide, measured in the direction of travel, and the width of the landing should not be less than the width of the stairway. For more information, visit the NACHI for deeper details on stairs!
| Stair Tread Width | Stair Riser Height | Angle or Slope |
|---|---|---|
| 12-1/2" | 5" | 22 degrees |
| 12/1-4" | 5-1/4" | 23 degrees |
| 12" | 5-1/2" | 24 degrees |
| 11-3/4" | 5-3/4" | 26 degrees |
| 11-1/2" | 6" | 27 degrees |
| 11-1/4" | 6-1/4" | 29 degrees |
| 11" | 6-1/2" | 30 degrees |
| 10-3/4" | 6-3/4" | 32 degrees |
| 10-1/2" | 7" | 33 degrees |
| 10-1/4" | 7-1/4" | 35 degrees |
| 10" | 7-1/2" | 36 degrees |
| 9-3/4" | 7-3/4" | 38 degrees |
| 9-1/2" | 8" | 40 degrees |
Shop our HAAS Stainless Cable Railing Axis system and Post Protectors that work with all stair angles. We designed and manufacture the fittings in the USA and supply the stainless steel cable you’ll need for your next DIY cable railing system on stairs, decks, and balconies.
