Final answer:
Building code requirements for ramps at egress doors focus on the ramp's slope, width, handrails, and surface condition, with common standards including a maximum slope of 1:12 and a minimum width of 36 inches. Handrails are generally required if the ramp has significant rise or run, and non-slip surfaces are mandated.
Step-by-step explanation:
The question pertains to the building code requirements for a ramp at an egress door. Code requirements can be very specific and vary by jurisdiction, but generally, they address the slope of the ramp, the width, the need for handrails, and the surface condition among other factors.
The slope is often the most critical factor and is usually mandated not to exceed a 1:12 ratio, which means for every inch of vertical rise, there should be at least 12 inches of ramp run. The width of the ramp should typically be at least 36 inches to accommodate wheelchair access.
Additionally, handrails are required on both sides if the ramp has a rise greater than 6 inches or a horizontal projection greater than 72 inches. The code may also require the ramp to have a non-slip surface and be maintained free of obstacles that could hinder egress.
For more detailed requirements, it is essential to refer to the specific building code that applies to the area where the construction is taking place, such as the Americans with Disabilities Act (ADA) Standards for Accessible Design in the United States.