Therefore let us recap on the residential stair code requirements.
Exterior door steps code.
This chapter provides guidelines on door height and width based on the function of the structure.
Minimum 36 inch clear width for stairway.
The maximum transmitted temperature end point shall not exceed 450 degrees f above ambient at the end of 30 minutes of the fire exposure specified in u b c.
Defects in masonry steps and landings outdoors sketches of exterior stair design requirements questions answers about exterior stair code specifications.
They may be block poured concrete wall or post footings.
For example by allowing two steps up to a total of 15 1 2 in.
Also the landing of the steps must be at least 36 inches from where it abuts lies adjacent to the house out to the first step.
While the finer details will ultimately be influenced by your local government s building regulations the international building code the international residential code and the standards set by the americans with disabilities act of 1990 maintain that exterior stairs that are a required point of egress in other words stairs that must be crossed on your way in and out of the building.
Maximum 4 1 2 inch handrail projection into stairway width on either side.
So this basically sums up the basic code requirements for residential stairs and their dimensions.
Exterior doors as provided for in section 1003 5 exception 1 and section 1020 2 which are not on an accessible route.
Doors shall be maintained self closing or shall be automatic closing by actuation of a smoke detector as provided for in section 4306 b.
Any of you that have tried to open your door with a bag of groceries and have had to back down a step or two to get the door open can.
This allowance provides some design flexibility.
A door is permitted to open at the top step of an interior flight of stairs provided the door does not swing over the top step.
Building codes keep stairways safe with rules that apply to the height and depth of each step support and handrails.
Footings must be at least 42 inches in depth.
Step down on the interior and up to two steps down to the landing on the exterior regardless of which way the door swings it can only swing over one step.
Summary of code requirements for residential stairs.
Screen doors and storm doors are permitted to swing over stairs or landings.
Code requirements for exterior doors are covered in chapter 10 of the ibc.
Building code for steps.
Doors other than the required egress door shall be provided with landings or floors not more than 7 3 4 inches 196 mm below the top of the threshold.
For all non egress exterior doors the 2003 code update allows a 7 3 4 in.