DIY Frequently Asked Questions / Extension Ladder')">
A non-self supporting type of ladder with two similar sections that are linked with internal guides on the bottom of base section and external guides on the top.
Sections are pulled apart to increase length.
Used for working in high areas and primarily for exterior applications.
Available in heights ranging from 16’ to 40’.
Smaller extension ladders are extended manually and secured with gravity spring lock brackets
that rest on the selected rung.
Larger extension ladders are extended by means of a rope and pulley running down the side of the ladder and secured with a cleat.
Generally available in all aluminum and fiberglass with aluminum rungs.
Rungs can be round or flat and are usually serrated for enhanced slip resistance.
Ladder shoes pivot to allow full contact with ground. Shoes can also be turned up to penetrate soft ground for extra stability.
Quality classifications include consumer (household), commercial (mechanic) and industrial grades.