(152 mm to 305 mm) from the draft stop on the side away from the opening.Ĩ.15.4.3.2 Where sprinklers are closer than 6 ft (1.8 m), cross baffles shall be provided in accordance with 8.6.3.4.2.Ĩ.15.4.4 Large Openings. The draft stops shall be of noncombustible or limited-combustible material that will stay in place before and during sprinkler operation.Ĩ.15.4.3.1 Sprinklers shall be spaced not more than 6 ft (1.8 m) apart and placed 6 in. The draft stops shall be located immediately adjacent to the opening. Draft stops shall meet all of the following criteria: Unless the requirements of 8.15.4.4 are met, where moving stairways, staircases, or similar floor openings are unenclosed and where sprinkler protection is serving as the alternative to enclosure of the vertical opening, the floor openings involved shall be protected by closely spaced sprinklers in combination with draft stops in accordance with 8.15.4.2 and 8.15.4.3.Ĩ.15.4.2 Draft Stops. Yes in some cases the draft curtain is requiredĨ.15.4.1* General.
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