2. No, the MAXIMUM is 1-1/2". I have a situation where there is a interior elevation difference of 0'-8 1/4" from one platform to the next. When a guardrail is required per the above explanation, it must meet a minimum height requirement of no less than 36 inches for it to serve the purpose of minimizing a fall. One height across all tasks and industries would certainly make enforcement easier, but this is not the case. 1. UNLESS the door does not swing out over the landing (a sliding glass door does not swing, so this part is no problem), in which case the MAXIMUM is 7 â¦ A stair riser is the back, vertical part of a step. To calculate if the steps will be within the Building Codes specs : 2 times the step riser height + 1 tread width equals between 24 and 25 in inches (60.96cm and 63.5cm). A step riser is the distance from the top of one step to the top of the next step, measured vertically. (b) Performance requirements. This should be no more than 7 3/4 inches. Staircase Riser Height: 7 3/4 Inches, Maximum . example: (2 x 7.5") + 10 = 25 (2 x 19.05cm + 10 = 48.1cm) Treads (the horizontal stair element you step on) that are at least 10 inches in depth and no more than 14 inches. My boss is wanting me to verify what the OSHA requirement is for maximum height allowed before a stair/step of some sort is needed. 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). A single step with a maximum riser height of 7 inches (178 mm) is permitted for buildings with occupancies in Groups F, H, R-2, R-3, S and U at exterior doors not required to be accessible by Chapter 11. All high profile COE trucks or truck-tractors shall be equipped on each side of the vehicle where a seat is located, with a sufficient number of steps and handholds to conform with the requirements of paragraph (a) of this section and shall meet the performance requirements: (1) Vertical height. Staircase riser height translates to the distance you move your foot either up or down from one step to an adjacent step. Guardrails are required when the possible fall is 30" or more and should be 42" above the deck. The average height of a stair step in the United Sates is 7 1/2 inches, but safe and comfortable stair dimensions should be determined based on a number of factors including how long the step is, how much space the staircase should take up and â¦ Code states that this should not be greater than 7 3/4 inches (194 mm). The height is measured vertically above the walking surface or the line that connects the nosing of a set of stairs. OSHAâs intent is to keep people safe across most industries, however, keep in mind that local building codes such as Cal-OSHA, contracts, and/or site policies can exceed the regulatory requirements. Handrails are required when you have three or more steps and should be between 34" and 38" high, measured from the nose of the step. Mobile ladder stands with a top step height above 10 feet (3 m) have the top step protected on three sides by a handrail with a vertical height of at least 36 inches (91 cm); and top steps that are 20 inches (51 cm) or more, front to back, have a midrail and toeboard. Stair widths with a minimum of 22 inches From all your responses it looks like the minimum is 1.5" step down with no more than 7 3/4" step down from threshold. Risers (the vertical element connecting treads) that are no less than 6 inches in height and no more than 7.5 inches. Risers - the Step Height [F] is the typical height of each step. While building codes vary from place to place, typically a step is 7" high and 11" deep. Minimum Required Guardrail Height . Inches in height and no more than 7.5 inches ( 194 mm ) horizontal stair element step... From the top of the next element you step on ) that at. 7.5 inches place, typically a step your foot either up or down from one platform the. 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