What is the maximum spacing allowed between vertical supports for guardrails?

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The maximum spacing allowed between vertical supports for guardrails is four feet. This standard is established to ensure that guardrails are sufficiently robust and effective in providing safety. Proper spacing between vertical supports is essential for maintaining the structural integrity of the guardrail system. If the spacing is too wide, there is a greater risk that the guardrail could fail to prevent a fall or an accident. A limit of four feet between supports balances the need for structural stability with practical considerations for installation and maintenance. This standard is particularly important in environments where safety is paramount, such as around elevated areas or construction sites.