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6/14/23,3:07 PM Chapter 7: Fire and Smoke Protection Features,2021 Washington State Building Code I UpCodes <br /> h. Prestressed slabs shall have a thickness not less than that required in Table 721.1(3)for the respective fire-resistance time period. <br /> i. Fire coverage and end anchorages shall be as follows:Cover to the prestressing steel at the anchor shall be 1/2 inch greater than that required away from the <br /> anchor. Minimum cover to steel-bearing plate shall be 1 inch in beams and 3/4 inch in slabs. <br /> j. For beam widths between 8 inches and 12 inches,cover thickness shall be permitted to be determined by interpolation. <br /> k. Interior spans of continuous slabs, beams and girders shall be permitted to be considered restrained. <br /> I. For use with concrete slabs having a comparable fire endurance where members are framed into the structure in such a manner as to provide equivalent <br /> performance to that of monolithic concrete construction. <br /> m.Generic fire-resistance ratings(those not designated as PROPRIETARY*in the listing)in GA 600 shall be accepted as if herein specified. <br /> n.Additional insulating material is not required on the exposed outside face of the column flange to achieve a 1-hour fire-resistance rating. <br /> TABLE 721.1(2) <br /> RATED FIRE-RESISTANCE PERIODS FOR VARIOUS WALLS AND PARTITIONS a,o,P <br /> MINIMUM FINISHED THICKNESS <br /> FACE-TO-FACEb(inches) <br /> MATERIAL ITEM CONSTRUCTION <br /> NUMBER 4 3 2 <br /> 1 hour <br /> hours hours hours <br /> 1-1.1 Solid brick of clay or shale.` 6 4.9 3.8 2.7 <br /> 1-1.2 Hollow brick,not filled. 5.0 4.3 3.4 2.3 <br /> 1.Brick of clay or 1-1.3 Hollow brick unit wall,grout or filled with perlite vermiculite or expanded shale aggregate. 6.6 5.5 4.4 3.0 <br /> shale <br /> 4"nominal thick units not less than 75 percent solid backed with a hat-shaped metal furring channel 3/4" <br /> 1 2.1 thick formed from 0.021"sheet metal attached to the brick wall on 24"centers with approved fasteners, _ _ 5d <br /> and 1/2 Type X gypsum wallboard attached to the metal furring strips with 1"-long Type S screws spaced <br /> 8"on center. <br /> )6/28 <br /> hps://up codes/viewer-export/washington/wa-building-code-2021/chapter/7/fire-and-smoke-protection-features#721.1 <br />