What is the MAXIMUM unsupported length between the end sprinkler and the last hanger for 1 1/2-inch pipe
36 inches is the maximum unsupported length between the end sprinkler and the last hanger for 1 1/2-inch pipe.
In plumbing and fire protection systems, the maximum unsupported length for pipes is critical to ensure structural integrity and prevent sagging. For 1 1/2-inch pipes, the maximum distance allowed is 36 inches without additional support.
This is the correct choice as it aligns with industry standards for the maximum unsupported length of 1 1/2-inch pipes, ensuring that the pipe maintains its proper alignment and function without additional support.
This option exceeds the recommended unsupported length for 1 1/2-inch pipe. Allowing 48 inches could lead to sagging and potential failure of the pipe system, which is why it does not conform to accepted installation practices.
A 60-inch unsupported span is also beyond the maximum allowed distance for 1 1/2-inch piping. This length would significantly increase the risk of pipe deformation, which could compromise the system's effectiveness and safety.
Choosing 72 inches would further amplify the issues associated with unsupported lengths. Such a span is not permissible as it substantially deviates from established codes, potentially leading to serious operational failures in the piping system.
In conclusion, the maximum unsupported length of 36 inches for 1 1/2-inch pipe is essential for maintaining the reliability and safety of plumbing systems. Exceeding this length can lead to increased risks of structural failure, underscoring the importance of adhering to established guidelines in pipe installation practices.
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