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Q i? pp� d O N Li C d+ �2 y' O pOj O <D N V C3i d y d lJ tb C d K100 d C? t a m d N 5. O. »'a� Dm D� v d = Dig S S d d S N � a D x 1 r d a a r 1 f Cf) 74 Yye n r no wo D o9y � it N N N d _ C d 5ga N tD N = N .t3 n o ii 3 d 4 74„ g y ' 3" 112" FIRE AND SMOKE PROTECTION FEATURES FIRE AND SMOKE PROTECTION FEATURES TABLE 722.6.2(4) FLOORING OR OVE DFRAMING' ASSEMBLY STRUCTURAL MEMBERS 6UBFLOOR OR ROOF DECK FINISHED FLOORING OR ROOFING H:udwood or softwood flooring on building paper resilient Flooring, ie /pinch wood structural panels or parquet floor felted -synthetic fiber floor coverings, carpeting, orceramic the on 7,,inch-thick Fiber -cement anderlayment or 3/,inch-thickpanel- Floor Wood "/„inch T & G softwood type underlay —y Ceramic tile on I'/,inch mortar bed �-- Roof Wood a inch wood smtctural panels or Finished moFmg material with or without insulation i1 %,b inch T & G softwood For SI: I inch =25A rant. a. This table applies only to wood Joist construction. It is not applicable to wood Was consrmation. TABLE 722.6.2(5) TIME ASSIGNED FOR ADDITIONAL PROTECTION DESCRIPTION OF ADDITIONAL PROTECTION FIRE RESISTANCE (minalae) Add to the fire -resistance rating of wood stud walls if the spaces between the studs are completely filled with glass fiber mineral wool bans weighing not less than 2 pounds per cubic foot (0.6 pound per square foot of wall surface) or rockwool or slag material wool batts weighing not less than 3.3 pounds per cubic foot (I pound per IS square foot of wall surface), or cellulose insulation having a nominal density not less than 2.6 pounds per cubic foot. For SI: I pounNcubic feat= 16.0185 kg/m'. 722.6.1.1 Maximum Dre-resistance rating. Fire -resis- tance ratings calculated for assemblies using the meth- ods in Section 722.6 shall be limited to not more than I hour. 722.6.1.2 Dissimilar membranes. Where dissimilar membranes are used on a wall assembly that requires consideration of fire exposure from both sides, the cal- culation shall be made from the least fire-resistant (weaker) side. 722.6,2 Walls, floors and roofs. These procedures apply to both load -bearing and nonload-bearing assemblies. 722.6.2.1 Fire -resistance rating of wood frame assemblies. The fire -resistance rating of a wood frame assembly is equal to the sum of the time assigned to the membrane on the fire -exposed side, the time assigned to the framing members and the time assigned for addi- tional contribution by other protective measures such as insulation. The membrane on the unexposed side shall not be included in determining the fire resistance of the assembly. 722.6.2.2 Time assigned to membranes. Table 722.6.2(1) indicates the time assigned to membranes on the fire -exposed side. 722.6.2.3 Exterior walls, For an exterior wall with a fire separation distance greater than 10 feet (3048 man), the wall is assigned a rating dependent on the interior membrane and the framing as described in Tables 722.6.2(1) and 722.6.2(2). The membrane on the out- side of the nonfire-exposed side of exterior walls with a fire separation distance greater than 10 feet (3048 mm) shall consist of sheathing, sheathing paper and siding as described in Table 722.6.2(3). 722.6.2.4 Floors and roofs. In the case of a floor or roof, the standard test provides only for testing for fire exposure from below. Except as noted in Section 7033, Item 5, floor or roof assemblies of wood from - in shall have an a er mem r m of sub - floor and mished floor conforming to Table 722.6.2(4) Or any Other Membrane met has a contrmau tion to fire resistance Of not less than 15 minutes in Table 722.6.2(1), 722.6.2.5 Additional protection. Table 722.6.2(5) indicates the time increments to be added to the fire resistance where glass fiber, rockwool, slag mineral wool or cellulose insulation is incorporated in the assembly. 722.6.2.6 Fastening. Fastening of wood frame assem- blies and the fastening of membranes to the wood fram- ing members shall be done in accordance with Chapter 23. 2019 CALIFORNIA BUILDING CODE 283 294 2019 CALIFORNIA BUILDING CODE