If you are working with an extension ladder that has 15 rungs in each of the two sliding sections, this is a 30-foot extension ladder. It can be easily estimated by adding both lengths.
An extension ladder refers to a portable ladder that can be adjusted in its length and easily managed by the operator.
An extension ladder is very useful to climb up and/or down, thereby this tool should have vertical supports along its whole length in order to avoid accidents.
This type of ladder (extension ladder) may have different sections in order to reach a specific length during work.
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