Roof Access Stairs Ibc

In order to access a 12 foot high platform an ibc stair would need 21 steps 7 inch rise 11 inch tread making the entire horizontal run of the stairs 19 25 feet.

Roof access stairs ibc. Assuming the minimum width of 36 inches the floor space used by these stairs is 57 75 square feet. In buildings four or more stories or more than 40 feet 12 192 mm in height above grade one stairway shall extend to the roof surface through a stairway bulkhead complying with section 1509 2 unless the roof has a slope steeper than 20 degrees 0 35 rad. The building is less than 4 stories and the ladder access would be allowed with a pop up hatch. In buildings located four or more stories in height one stairway shall extend to the roof.

Access to setback roof areas may be through a door or window opening to the roof. The original plan was for a ladder. Access stairs for ibc osha code compliance panel built s prefabricated steel stair systems can be found everywhere from hospitals to warehouses to military bases. Solid risers are required for ibc stairs except for means of egress stairways as long as the opening between treads does not allow a 1 2 inch diameter sphere to pass through.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. The triangular openings at the open sides of a stair formed by the riser tread and bottom rail shall not allow passage of a sphere 6 in diameter a. 2006 ibc 1009 11 stairway to roof. How does superior comply.

Ibc 1015 5 key exception 1. In buildings without an occupied roof access may be by an alternating tread device. What they have installed is a stairway to the pop up. Cables in cable railing systems are tensioned to the point where they can actively resist a 4 sphere 4.

The stairway was installed instead of a ladder. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. That s a lot of space used for a staircase.