NYC 2014 code allows handrail protruding within egress stair but if steel channel stair stringer is higher than stair tread and protruding from wall, shouldn't it affect egress stair width? It seems logical but looking for concrete proof to persuade colleague.
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Egress Stair Width with protruding stringer
- Thread starter studio L
- Start date
Only If the inner face of the stringer (the face towards the stair) extends further into the stair than the handrail. Section 1012.8 states projections "at each handrail shall not exceed 4-1/2 inches (114 mm) at or below the handrail height."
Does this mean we can have wall below handrail to be closer toward stair? I thought the sprit of code is to allow projection of handrail while providing clearance on floor and above. That is why i assumed 1003.3.4 states only handrail. Is there any response from NYC DOB on this?
Yes. There is no need to have the area below the handrail available for egress width. The human form has shoulders and arms that extend further than our hips. Stairway width is needed above the handrail to accommodate the shoulders and arms. Thus, if a wall surface is more than 4-1/2 inches from the stair-side edge of the handrail, you can only measure egress width to the 4-1/2-inch dimension and not further, because most people's shoulders do not extend further than the 4-1/2 inches.
ADAguy
REGISTERED
But? what of the width of stretchers with obese persons wider than the board?
mtlogcabin
SAWHORSE
If they would be wider than the width between the handrails then how did they get up the stairs in the first place?
Codes are not written to accommodate every one under every incident. Under the Legacy Codes late 80's and early 90's the instructors would sometimes use the term "Acceptable Losses" as the answer to your question then again "Acceptable Losses" depends on who does the counting and he/she doesn't usually have skin in the game.
Codes are not written to accommodate every one under every incident. Under the Legacy Codes late 80's and early 90's the instructors would sometimes use the term "Acceptable Losses" as the answer to your question then again "Acceptable Losses" depends on who does the counting and he/she doesn't usually have skin in the game.
What about it? regardless of a person's shape, the widest point is at the hips or higher. If they are wider than the handrail spacing, then they better use the elevator or wait in the area of refuge if it is an egress issue and the elevators are not available.