We have an outdoor wooden canopy overhanging over a building entrance with the following dimensions: 45'-6" x 13'-0". The canopy has an existing wet pipe sprinkler system utilizing water/glycol mix. The building is in an area where winter temperatures can go below 0 deg F (-18 deg C).
Given the new NFPA requirement of reduced glycol mix ratio and hence the existing sprinkler system is no longer compliant with NFPA and requires to be replaced.
My question is, is it feasible and compliant to have the wooden canopy treated with fire retardant NFPA 703 approved coating/painting and hence the canopy can be considered non-combustible or at least limited-combustible eliminating the requirement to install a sprinkler system under NFPA 13 section 9.2.3?
I appreciate your feedback. Thanks
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