Extension Trestle Ladders
The Extension Trestle Ladder is a self-supporting portable ladder adjustable in length, consisting of a Trestle Ladder base and a vertically adjustable extension section with a means for locking the ladders together. These ladders are often used in pairs to support a scaffold plank. Extension Trestle Ladders are intended for use by one person.
Trestle Ladder
- They have two sections that are hinged at the top and form equal angles with the base.
- They are used in pairs to support planks or staging.
- The rungs are not used as steps.
- The length cannot exceed 20 feet.
For more information on extension trestle ladders, see the American Ladder Institute's webpage.
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1-10. Which type of ladder is often used in pairs to support a scaffold plank?
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