What is the maximum spacing for lateral bracing of a wet pipe fire protection sprinkler system main supply pipe?

The maximum spacing for lateral bracing of a wet pipe fire protection sprinkler system main supply pipe is established to ensure that the system maintains its structural integrity during normal operation and in the event of seismic activity or other external forces. The correct answer indicates a spacing of 40 feet, which is aligned with the requirements set forth in the relevant standards governing the installation of fire protection systems.

This spacing allows for adequate support and stabilization of the pipe while preventing sagging or displacement that could compromise functionality, especially under dynamic conditions. It is important to follow these guidelines as they contribute to the overall reliability of the fire protection system, ensuring that pipes remain properly positioned to deliver water effectively when needed.

In contrast, the other options either exceed or fall short of the requirements, which could lead to insufficient support and increased risk of failure under stress conditions. Adhering to the correct spacing standards is crucial for maintaining both compliance and performance expectations in fire safety systems.