With ladders installed at not more than 70 degrees from the horizontal, the landing platforms must be provided for every how many vertical meters?

• A. 6 meters
• B. 9 meters
• C. 12 meters
• D. 15 meters

Answer: (B)

Ladders need regular rests to keep climbs safe. When a ladder is installed at a angle not steeper than 70 degrees from the ground, a landing platform must be provided after every 9 meters of vertical rise. This spacing gives a safe place to rest, manage tools, and reorient, which helps maintain three points of contact and reduces the chance of a long, unbroken fall. If the interval were shorter, platforms would be overly frequent; if longer, you’d have a long climb without a rest point, increasing risk. So the required interval is 9 meters.