Maximum Height For Steps. Ultimate Guide to Stairs Stair Riser and Going Dimensions in mm Design Handrail graspability to be either Type I or II with a Minimum 1-1/2 inch clearance from a wall. Standard and spiral stairs both must adhere to a maximum riser height of 9.5 inches per OSHA 1910.25(c)(2) and 1910.25(d)(2).
rise_run_tread Stair dimensions, Stair rise and run, Stairs treads and risers from www.pinterest.com
IBC 1011.5.2 stipulates that the minimum and maximum stair riser heights must be 4 inches (10.16 cm) and 7 inches (17.78 cm), respectively Handrail graspability to be either Type I or II with a Minimum 1-1/2 inch clearance from a wall.
rise_run_tread Stair dimensions, Stair rise and run, Stairs treads and risers
Standard and spiral stairs both must adhere to a maximum riser height of 9.5 inches per OSHA 1910.25(c)(2) and 1910.25(d)(2). OSHA 1910.25(d)(2) requires spiral stairs to have h ave a maximum riser height of 9.5 inches (24 cm) Maximum stair step riser height-shall be not more than 7.75" or in some codes <= 7.0" or in Canada <=8.25" Minimum stair step riser height: - not less than 4" Step riser height uniformity - no more than 3/8" variation between successive step surfaces, or in some codes <= 3/16" / 4.8 mm.
2009 IRC Code Stairs THISisCarpentry. There are many ways to construct stair risers, but most fall into two categories regarding their position: vertical and angled According to OSHA 1910.25(b)(3), every type of stair system is required to have a uniform riser height.
Residential Stair Codes Stair Riser Height. Under the IRC, a single flight of stairs can have a maximum vertical rise of 12 feet 7 inches between floor levels or landings (R311.7.3) Minimum 10 inch stair tread depth with nosing or Minimum 11 inches with no nosing