Guardrails top rail height should be 42 inches with a tolerance of plus or minus how many inches?

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Multiple Choice

Guardrails top rail height should be 42 inches with a tolerance of plus or minus how many inches?

Explanation:
Guardrails are required to provide consistent fall protection, so the top rail is specified at 42 inches. To account for everyday variation in measurement and installation, a tolerance of plus or minus three inches is allowed. This sets the acceptable height range at 39 to 45 inches, balancing practical construction with the safety intent of the standard. Smaller or larger tolerances would either undermine protection or create usability and design issues.

Guardrails are required to provide consistent fall protection, so the top rail is specified at 42 inches. To account for everyday variation in measurement and installation, a tolerance of plus or minus three inches is allowed. This sets the acceptable height range at 39 to 45 inches, balancing practical construction with the safety intent of the standard. Smaller or larger tolerances would either undermine protection or create usability and design issues.

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