Minimum Height The Ladder Must Be To Reach The Roof

For instance on an extension ladder you can only use up to the top three feet.

Minimum height the ladder must be to reach the roof.

However if you need to reach 16 feet of height then you should go for a step ladder which is no less than 12 feet tall. Keep this in mind when calculating the minimum height the ladder must be to reach the roof. The top of the cage shall be a minimum of 42 inches 1 1 m above the top of the platform or the point of access at the top of the ladder with provision for access to the platform or other point of access. The maximum height you can reach height of the ladder 4 feet.

Types of ladders and their uses even though the primary purpose of a ladder is to reach places that you cannot usually reach on your own all ladders are not the same. Per osha 1910 23 d 4 the side rails of through or sidestep ladders must extend 42 inches above the top of the access level or landing platform served by the ladder. A six foot step ladder is needed for work on a 10 foot ceiling. They are a foot apart on most ladders so 15 feet would be close.

Hence for reaching a height of 25 feet you need a ladder height of 28 feet. When considering how tall a ladder needs to be to reach a roof don t forget that useable height of a ladder is different than its actual height. So if you don t need to reach a height of more than 12 feet than an 8 feet step ladder will suffice. Here s the calculation to determine the height of a step ladder.

1926 1053 a 21 i. The ladder should be at the correct angle with the base 1 foot out from the surface it rests against for every 4 feet of height to that point. You should normally have three rungs steps past the surface you are climbing to from the ladder. A step ladder must reach within four feet of the work surface for a user of average height.

Step 4 calculate the length for extension ladders based on work heights and pitch angles. When the ladder rests against a surface such as a roof line it needs to extend 3 feet beyond the top support point. Add a foot since you have to.