Length
Total ladder size
Total length with extensions
Total length of the ladder at maximum extension.
(Maximum) standing height
This is the highest position of the ladder where a person can safely stand.
Maximum reach
This is the highest position of the ladder in the upright position plus 2 m (a 170 cm person with a vertical reach of 30 cm).
Clear internal width
The distance between the inner flanges of the ladder’s side rails.
Rung width
The width of a single rung.
Rung depth
The depth of a single rung. (Rounded to the nearest centimeter).
Depth of double rung
Depth of two overlapping rungs. (Rounded to the nearest centimeter).
Top width
Width at the top of the ladder.
Base width
Total width across the ladder feet. (Rounded to the nearest centimeter).
Base depth
Total depth across the feet of the extended ladder. (Rounded to the nearest centimeter).
Maximum base distance
The maximum vertical distance from the highest rung or step that the climber is recommended to use to the horizontal plane of the ladder base support, with the ladder in the preferred climbing position. (Rounded to the nearest centimeter).
Minimum base distance
The minimum vertical distance from the highest rung or step that a climber is recommended to use to the horizontal plane of the ladder base support, with the ladder in the preferred climbing position. (Rounded to the nearest centimeter).
Maximum working height
Working height is the length of a non-self-supporting portable ladder measured along the rails from the ladder’s base support point to the top support point.
Minimum working height
Working height is the length of a non-self-supporting portable ladder measured along the rails from the base support point of the ladder to the top support point.
Storage height
Measured from the bottom of the base to the highest point of the ladder in the closed storage position. The extendable legs are positioned vertically. (Rounded to the nearest centimeter).
Storage width with base
Measured across the total width of the ladder’s widest point. (Rounded up to the nearest centimeter).
Storage depth
Measured across the deepest depth from front to back with the ladder closed in the storage position, including all legs or wheels. (Rounded up to the nearest centimeter).