What is the maximum reach for an 8-m (28-ft) ladder?

What is the maximum reach for an 8-m (28-ft) ladder?

• A. Roof of a two-storey building
• B. Second-storey window sill
• C. Second-storey window with two rungs inside
• D. Roof of a three-storey building

Answer: (A)

When you’re using a fixed-length ladder, how high you can reach depends on the ladder length and the angle you place it at. An 8-meter ladder placed at a safe angle rises about 7.7 meters above the ground, which is high enough to reach the roofline of a typical two-storey building. A three-storey roof would usually be higher than what this ladder can safely reach, so it’s not achievable with an 8-meter ladder. The second-storey window sill is lower than that roofline, so it’s not the maximum reach, and using two rungs inside doesn’t provide a practical or safe exterior reach. So, the highest safe exterior reach for an 8-meter ladder is the roof of a two-storey building.

When you’re using a fixed-length ladder, how high you can reach depends on the ladder length and the angle you place it at. An 8-meter ladder placed at a safe angle rises about 7.7 meters above the ground, which is high enough to reach the roofline of a typical two-storey building. A three-storey roof would usually be higher than what this ladder can safely reach, so it’s not achievable with an 8-meter ladder. The second-storey window sill is lower than that roofline, so it’s not the maximum reach, and using two rungs inside doesn’t provide a practical or safe exterior reach. So, the highest safe exterior reach for an 8-meter ladder is the roof of a two-storey building.