The only apparent purpose of the stair is not to provide a means of egress to the roof level but to provide access to the roof for the maintenance of equipment.
Ibc stairway roof hatch.
Bilco roof hatches provide safe and convenient access to roof areas by means of an interior ladder ship stair or service stair.
If the stairs are outside the design of the ibc stairs cannot allow water to accumulate on the walking surface.
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.
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.
Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails.
Chapter 8 fire protection.
A variety of special sizes are also available to provide an accessible way to install or remove large pieces of equipment from a building.
Ibc specifically exempts skylights and roof hatches as long as they are not part of the structure of the roof.
I argued as well.
Where a stairway is provided to a roof access to the roof shall be provided through a penthouse complying with section 1509 2.
Fasteners for asphalt shingles shall be galvanized stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch diameter 9 5 mm head of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1 mm into the roof sheathing.
In buildings in occupancy groups r 1 and r 2 two stories in height and in occupancy group r 2 three stories in height with not more than one dwelling unit per story access to the roof shall be permitted to be a noncombustible roof hatch or trap door not less than 21 inches 533 mm in width and 28 inches 711 mm in length.
All products feature engineered lift assistance for easy one hand operation.
Guards ibc 1011 13 1015 guards are required along all open sided walking surfaces of the stairway including landings and stairs.