In buildings of 4 or more stories above grade plane ibc requires certain buildings to provide access to the roof.
16 square foot roof hatch.
In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.
For ultimate corrosion resistance and outstanding exterior durability babcock davis provides powder coat finish.
The reality is if you have a stair to the roof you usually get a much larger hatch than 16 sq.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
In buildings without an occupied roof access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1 5 m 2 in area and having a minimum dimension of 2 feet 610 mm.
The code requires a stairway to the roof for buildings 4 or more stories above grade plane unless your roof is steeper than 4 12 1011 12 and the roof is occupied.
For instance if the roof is 1550 square feet then it is 16 squares.
Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments.
2015 ibc 1011 12 2 roof access states.
In buildings without an occupied roof access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1 5m2 in area and having a minimum dimension of 2 feet 610 mm.
Outside of the u s a degree angle is typically used.
This is simply 100 square feet of roof.
How to estimate roofing materials.
The average roof is 3 000 square feet or around 30 squares.
It is often compared to slope but is not exactly the same.
Where the roof hatch opening providing the required access is located within 10 feet.
Babcock davis roof hatches provide safe and convenient access to commercial building roof areas using interior ladders and stairs.
In buildings without an occupied roof access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1 5 m in area and having a minimum dimension of 24 inches 610 mm.
Roofing material is estimated by the square which is equal to 100 square feet.
1009 16 2 protection at roof hatch openings.
30 36 x 96 is a common size for service stair access or you get a door.
To find the squares divide the overall roof area by 100 and then round up.