Straight ladders must be positioned at an angle of one-fifth of the working height. (Option B)
How to position straight ladders?
When positioning straight ladders, adhere to the one-fifth rule, aligning the ladder at an angle that is one-fifth of the working height.
This rule helps maintain stability by ensuring an appropriate balance between the ladder's angle and distance from the vertical surface.
The working height is the crucial factor, representing the vertical distance from the ground to the point of use. Proper positioning reduces the risk of the ladder tipping over due to an overly steep or shallow angle.