Need some opinions here.
Myself and another FD instructor got into a debate (professional at this time : > ) about the correct protocol for stepping off of an extension ladder placed to the roof of a structure, either onto a roof ladder or onto a flat roof.
The contention is whether you must step off of a rung that is below the roof line or you can step off of one at the roof line or the very first one above.
The IFSTA essentials 5th edition is sort of vague, it only says that ladders placed for roof work should be extended well above the roof line to provide both foot and hand holds for access to and egress from the roof.
My personal position and interpretation of the statement is that stepping off from the roof line or the first rung above is indeed safer as it requires less of a stretch and also allows you to use less downward force on the roof structure to pull yourself up. Obviously making it much easier to recover if the roof should fail. Yes, I am aware people should always sound roofs. I know that the concern held by many is that you are past the pivot point, and I agree you should never step onto the overhanging part of a roof ladder, but the mechanical force required to pivot a just off vertical extension ladder which is being footed or is tied off is immense and far exceeds the weight of any firefighter i've ever seen.
I have seen the video of the ladder move from the guy stepping onto a low flat roof, but that was a failure to properly heel the ladder and would have happened no matter what rung he stepped from.
Anyway, opinions please.
Thanks
Myself and another FD instructor got into a debate (professional at this time : > ) about the correct protocol for stepping off of an extension ladder placed to the roof of a structure, either onto a roof ladder or onto a flat roof.
The contention is whether you must step off of a rung that is below the roof line or you can step off of one at the roof line or the very first one above.
The IFSTA essentials 5th edition is sort of vague, it only says that ladders placed for roof work should be extended well above the roof line to provide both foot and hand holds for access to and egress from the roof.
My personal position and interpretation of the statement is that stepping off from the roof line or the first rung above is indeed safer as it requires less of a stretch and also allows you to use less downward force on the roof structure to pull yourself up. Obviously making it much easier to recover if the roof should fail. Yes, I am aware people should always sound roofs. I know that the concern held by many is that you are past the pivot point, and I agree you should never step onto the overhanging part of a roof ladder, but the mechanical force required to pivot a just off vertical extension ladder which is being footed or is tied off is immense and far exceeds the weight of any firefighter i've ever seen.
I have seen the video of the ladder move from the guy stepping onto a low flat roof, but that was a failure to properly heel the ladder and would have happened no matter what rung he stepped from.
Anyway, opinions please.
Thanks
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