How far apart are the rungs on an extension ladder?
2 min read
Asked by: Danielle Arora
The rung spacing on the extension section of the extension trestle ladder shall be not less than 6 inches (15 cm) nor more than 12 inches (31 cm), as measured between center lines of the rungs, cleats, and steps.
How tall is an extension ladder with 15 rungs?
Extension Ladder Chart
| Extension Ladder Height | Maximum Reach of Extension Ladder | Distance of Base Placement from Wall |
|---|---|---|
| 16 foot | 15 feet | 4 feet |
| 20 foot | 19 feet | 5 feet |
| 24 foot | 23 feet | 6 feet |
| 28 foot | 27 feet | 7 feet |
What is the 4 to 1 rule for ladders?
The base of the ladder should be placed so that it is one foot away from the building for every four feet of hight to where the ladder rests against the building. This is known as the 4 to 1 rule.
How wide should ladder rungs be?
Ladder Rung Width: 16 Inches
Per OSHA 1910.23(b)(4), ladder rungs, steps, and cleats must have a minimum clear width of 16 inches (measured before installation of ladder safety systems) for fixed ladders.
What is rung spacing?
Standard ladder design per the American National Standards Institute utilizes a 30.5 cm (12-inch) rung spacing, which is the distance between steps along the rails. The European standard provides for a range of 25.0 to 30.0 cm (9.8 to 11.8 inches).
What is the formula for setting up an extension ladder?
Extension ladders must be placed at the proper angle. Use a 4:1 ratio for setting ladders (approximately 75 degrees) – for every four feet in height, the base of the ladder should be moved one foot out from the wall or structure.
How do you set up an extension ladder?
Set the ladder at the proper angle. When a ladder is leaned against a wall, the bottom of the ladder should be one-quarter of the ladder’s working length away from the wall. For access to an elevated work surface, extend the top of the ladder three feet above that surface or secure the ladder at its top.
How far apart must the side rails of portable ladders be?
11.5 inches
The minimum clear distance between side rails for all portable ladders must be 11.5 inches (29 cm).
How many rungs are on a ladder?
Ladders are everyday pieces of access equipment. Used right, ladders are not particularly dangerous.
