What is the minimum outside diameter for round ladder rungs?

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Multiple Choice

What is the minimum outside diameter for round ladder rungs?

Explanation:
The minimum outside diameter for round ladder rungs is 1 1/4 inch. This size provides a secure contact surface for a boot or shoe, reducing the risk of slipping, while delivering enough material to resist bending and wear under typical climbing loads. Smaller diameters would be too narrow for safe foot placement and could deform more easily, whereas a much larger diameter would be awkward to step on without added safety benefits. Standards use 1 1/4 inch as a practical balance between grip, strength, and usability.

The minimum outside diameter for round ladder rungs is 1 1/4 inch. This size provides a secure contact surface for a boot or shoe, reducing the risk of slipping, while delivering enough material to resist bending and wear under typical climbing loads. Smaller diameters would be too narrow for safe foot placement and could deform more easily, whereas a much larger diameter would be awkward to step on without added safety benefits. Standards use 1 1/4 inch as a practical balance between grip, strength, and usability.

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