Post Number: 574
|Posted on Saturday, October 09, 2010 - 02:06 pm: ||
We have never used two ladder hooks on one ladder unless it was a stationary ladder loaded down with weight (a brick chimney job comes to mind) and I've been working on hook ladders since 1968. Two hooks makes the ladder unwieldy - too heavy at the top to carry around easily on the roof, which is why we would only use two hooks if we didn't have to move the ladder around. Problem is, the ladder itself has a limited weight rating, so how much weight you can put on one rung is limited.
The ACRO ladder hook is designed to use only one hook per ladder: http://josephjenkins.com/store/ladder-hook-acro-11082.html.
Most of the other ladder hook manufacturers state that two hooks are supposed to be used per ladder. I think they say this for liability purposes, knowing no one uses two hooks. If there is an accident, the manufacturer can say that it was because the hooks were not used as directed.
You should keep an eye on your ladder hooks and inspect them regularly. If it looks like they're bending, scrap them and get a new one.