SWLC Climbing 1-6 Practice Test

Where should the 200-lb design force be applied to test guardrails?

Within two inches from the top rail at any point along the top edge At the far end of the top rail On the bottom rail In the middle of the guardrail

Correct Answer:

Within two inches from the top rail at any point along the top edge

Explanation:

The load is placed within two inches from the top rail along the top edge because that spot experiences the highest stress and bending action during an impact. Positioning the 200-lb design force there simulates the real load path a vehicle would impose on the guardrail, testing its ability to resist tipping, pulling, and deflection through the rail and its connections to the posts. Placing the force at the far end, on the bottom rail, or in the middle wouldn’t reproduce the same stress pattern or failure risk, since those locations don’t capture the critical top-edge interaction and lever arm created by a typical impact.

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