Question

Portable ladders must be able to withstand how much of their maximum load?

1) 50%
2) 75%
3) 100%
4) 150%

Answer 1

Portable ladders must withstand at least four times the maximum intended load, which is equivalent to 150% of their maximum load.

Step-by-step explanation:

Portable ladders must be designed to withstand a certain amount of weight to ensure they are safe for use.

According to safety standards, portable ladders must be able to withstand at least four times the maximum intended load, except that each extra-heavy-duty type 1A metal or plastic ladder must sustain at least 3.3 times the maximum intended load. This means that the correct answer is 4) 150%.