Minimum ladder length, content image | © Günzburger Steigtechnik GmbH Minimum ladder length, content image | © Günzburger Steigtechnik GmbH

Ladder length with known vertical height

Minimum length of ladder or stairs

Our table contains the minimum lengths required of ladders and stairs to safely reach a given vertical height. Essentially, the next-highest ladder length or stair length from our product range is recommended.

Example to calculate the minimum length:

  • Vertical height (upper contact point) = 6.00 m
  • Use of a rung ladder with a 70° inclination angle
  • Formula: vertical height in m x factor 1.064 = minimum ladder length in m
  • 6.0 m x 1.064 = 6.40 m

Minimum ladder lengths

Vertical height 75° rung ladder * 70° rung ladder ** 70° step ladder 60° stairs 45° stairs
2.00 m 2.05 m 2.15 m 2.15 m 2.30 m 2.85 m
2.50 m 2.60 m 2.65 m 2.65 m 2.90 m 3.55 m
3.00 m 3.10 m 3.20 m 3.20 m 3.45 m 4.25 m
3.50 m 3.60 m 3.70 m 3.70 m 4.05 m 4.95 m
4.00 m 4.15 m 4.25 m 4.25 m 4.60 m 5.65 m
4.50 m 4.65 m 4.80 m - 5.20 m 6.35 m
5.00 m 5.20 m 5.30 m - 5.80 m 7.05 m
5.50 m 5.70 m 5.85 m - 6.35 m 7.80 m
6.00 m 6.20 m 6.40 m - 6.95 m 8.50 m
6.50 m 6.75 m 6.90 m - 7.50 m 9.20 m
7.00 m 7.25 m 7.45 m - 8.10 m 9.90 m
Formula vert. height x factor 1.035 vert. height x factor 1.064 vert. height x factor 1.064 vert. height x factor 1.155 vert. height x factor 1.414

* Just within the allowed tolerance

** Our recommendation

All values are rounded up to 5 cm.

Worth knowing: The Ordinance on Safety and Health demands that ladders, step stools and other working equipment represent the state of the art.