What is the maximum threshold height allowed for sliding doors to maintain accessibility?

What is the maximum threshold height allowed for sliding doors to maintain accessibility?

• A. 1/2 inch
• B. 3/4 inch
• C. 1 inch
• D. 1 1/4 inch

Answer: (B)

The key idea is ensuring door thresholds don’t create a barrier for someone using a wheelchair. For sliding doors, the threshold can be higher than a tiny step but must stay within a limit that allows smooth crossing with a bevel. The maximum allowed height is three quarters of an inch. This height balances keeping weather barriers and hardware functional with making the transition rollable. Heights lower than that are fine, but stepping up to one inch or more would hinder wheelchair passage and violate accessibility guidelines, while a height around three quarters of an inch can be eased with a gentle bevel so the edge isn’t sharp.

The key idea is ensuring door thresholds don’t create a barrier for someone using a wheelchair. For sliding doors, the threshold can be higher than a tiny step but must stay within a limit that allows smooth crossing with a bevel. The maximum allowed height is three quarters of an inch. This height balances keeping weather barriers and hardware functional with making the transition rollable. Heights lower than that are fine, but stepping up to one inch or more would hinder wheelchair passage and violate accessibility guidelines, while a height around three quarters of an inch can be eased with a gentle bevel so the edge isn’t sharp.