ErectaStep uses Round aluminum handrails and it’s required they need to 1.25″ (32mm) to 2″ (51mm) in diameter. They are required to be mounted between 34″ (864mm) and 38″ (965mm) above the tread nosings and landings and mounted a minimum of 1.5″ (38mm) off the wall. If the ceiling must be at least 14’ 8 high and the ceiling is only 13ft, there’s a. Above the top step, your ceiling must be at least 14’ 8. So, as you ascend your stair case to a floor that is 9ft off ground level, your top stair treads must still maintain 6’8 of head room. On a very wide stair, you need to space intermediate handrails no more than 60″ (1524mm) apart. Portland’s stair code requires that each stair tread must have 6’ 8 of vertical head room. Some of the key code regulations for stairs serving habitable rooms are: Each flight must not have more than 18 or less than 2 risers The height and depth of stair treads must be consistent throughout each flight of stairs If the stair is higher than 10m or three storeys, the treads must be solid (ie. Stair handrails need to be on both sides of the stair and can’t project more than 4.5″ (114mm) into the stair width on each side. FRONT STAIR RAIL CODE PORTLAND OR PLUSIt is important to note that the ADA will require you to go one tread depth plus 12″ (305mm) past the bottom riser so it generally overrides the IBC. The IBC requires that your handrail extend 12″ (305mm) past the top riser and one tread depth past the bottom riser. Handrails in IBC buildings need to return to a wall, a guard or the walking surface or continue to another handrail. Stair landings a required for 12′ (3658mm) vertical stairs inclines and must be at least as deep as the stairs are wide (up to 4′-0″). Where a door opens into the landing it can’t project more than 7″ (178mm)into the required depth of the landing. ErectaStep commercial stairs with winders will be custom orders. Stairs with winders need to be at least 11″ (279mm) deep and when 12″ (305mm) in from the narrow edge and the minimum depth must be 10″ (254mm). The riser height must be between 4″ (102mm) and 7″ (178mm) and the treads must be at least 11″ (279mm) deep. Stairways have to be at least 44″ (1118mm) if occupant load is over 50 and 36″ (914mm) width if under 50 occupants you can go to. Stairs must have at least 80″ of head height measured off the tread nosings and it needs to be maintained for one additional riser depth at the bottom of the stairs. It is much more complex, but these are the general rules. Strength: The top rails of stair rail systems must withstand, without failure, a force of at least 200 pounds applied in any downward or outward direction within two inches of any point along the top edge of the rail. Our metal stairs are IBC Compliant… are yours? International Building Code Guidelines overview for commercial buildings and common stairs in buildings. End of a stair rail: The end of a stair rail must not present a projection hazard.
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