What is the minimum height for a guardrail?

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Multiple Choice

What is the minimum height for a guardrail?

Explanation:
Guardrails are there to prevent falls from elevated surfaces, so inspectors look for a height that provides a usable barrier. In this NSPIRE practice item, the minimum height tested for a guardrail is 30 inches. That means any guardrail lower than 30 inches would not meet the minimum protective standard. A guardrail height of 32, 34, or any higher value would still be compliant, but they’re taller than the minimum, not the minimum itself. In real-world codes, guardrails around decks, stairs, or elevated platforms are often set higher (commonly 34–42 inches), but the NSPIRE item uses 30 inches as the lower threshold to identify insufficient guarding. The key idea is that the top of the rail must be at least 30 inches above the walking surface to provide adequate protection.

Guardrails are there to prevent falls from elevated surfaces, so inspectors look for a height that provides a usable barrier. In this NSPIRE practice item, the minimum height tested for a guardrail is 30 inches. That means any guardrail lower than 30 inches would not meet the minimum protective standard. A guardrail height of 32, 34, or any higher value would still be compliant, but they’re taller than the minimum, not the minimum itself. In real-world codes, guardrails around decks, stairs, or elevated platforms are often set higher (commonly 34–42 inches), but the NSPIRE item uses 30 inches as the lower threshold to identify insufficient guarding. The key idea is that the top of the rail must be at least 30 inches above the walking surface to provide adequate protection.

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