New sprinkler system being installed in commercial building downtown and they want to put wet inside and dry on docks is that allowed
Yes. The building code states that an automatic sprinkler system be provided in certain occupancies and fire areas. The type of system provided depends on the installation location. Automatic wet is best for most building areas. Dry-pipe systems are required by NFPA 13 (section 188.8.131.52) for areas subject to freezing that cannot maintain a minimum of 40 degrees (i.e. loading docks)..
yes allowed as stated above
Yes, you can do that, however if the Loading Dock is small enough, an anti-freeze system can be considered.
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