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International Conference of Building Officials <br />Report No. 3001 <br />6ESCARIW COMMITTEE AEIDMMEYII ATi0A August,1975 <br />ONE FIOUR FIRE -RESISTIVE COMBUSTIBLE PARTITION <br />%Mil REGULAR CYPSUNI BOARD <br />MINERALS AND MINERAL FIBER DIVISION <br />UNITF.n STATES CYPSUhI COMPANY <br />325 SOUTH VIRCIL AVENUE <br />LOS ANCELES, CALIFORNIA 90090 <br />L Subjects One-Huur Fire -Resistive Comhushble Partition,, <br />with Regular C)pium Board. <br />11. Dtsctlption: One-Huur Fire -Resistive Nunbuting Partition, <br />Thu one•huur nonbearing partition consists of 2 by 4 worse studs <br />spaced 19 Inche on center synth ss-inch agular gy um wAll. <br />board applied vertically or hudrontallYY on ea-h side. FP:rrestopping <br />.hall be o. nqul,e,l Ly Seetios, 2517 of l4e Unifuna Bull:,•., <br />Coale. The panels are attached wllh 5-penny gypsum wallboanl <br />palls 7 inches on center along panel edges end at each Interme• <br />dlate stud. Joints are finished with tape and joint compound. The <br />stud cavities are insulated with 3-inch thick THERMAFIBER <br />Mineral Wool bolts IS inches wide stapled to the sides of the <br />studs. These fully enclosed baits have a density, of npp•mimately <br />195 pounds per cubic foot. The addition of RC-1 Resilient <br />Channel for sound attenuation (STC•52) is optlonal on this sys• <br />tem or the following jingle stud load -beating msembly. See <br />Report No 1602 for construction details of the resilient usemhly. <br />One -Hour Fin-Rnlstive Load -Bearing Partltion: Comtn:ctioo <br />is the same as the nonbar ring partition described previously es- <br />crpt that loads not exceecung 1000 pounds per stud for 2 by 4 <br />otuds and 60 ounds r stud fotuds may be super. <br />Imposed" s er < o no ace e_ . For height, <br />in exce,a of R feet, the allowable load Is based can an allmvnhle, <br />stress In compression perpendicular lea the ;ruin on the rill of 190 <br />pounde per square inch, or with a muimun, vtrea not to exceesl <br />6half of that permitted by the column formula: <br />0.30E <br />(Ud)e <br />Per Sectlgn 2507 (e) of Use Uniform Building Code, whlehrvor <br />method is the most restrictive. <br />One flour Staggered Stud or Double Stud Construction, Can. <br />strurtiun and design are the same as described previously for the <br />beating and nonbearing assemblies. The staggered stu,l wvII ha, <br />studs stag tied 10 Inches on center on each side of the common <br />top and 9ttom plates. One layer of 2-Inch THERMAFIBER <br />Mineral Wool buts Is IuhBed In the stud cavity on each row, of <br />studs as described previously. The double atud wall on of it <br />double raw of studs and pplate with one Is or of 2-mch m(eeral <br />wod In cat's stud r vity oI saeh row of st-T <br />Ono -Hour Exterior Wall Constructions Construction and d"lgn <br />duplicate the stud assembhn described previoui y with A 3-inch <br />mineral Wool bait except dust the exterior facing Is or required <br />for am -hour extorter walls In Table No. 43-0 of the Undurm <br />Bnilding Code. <br />Identilicationt The mineral wool bath arc packagyed In brown <br />bags or tubes and are falseled or stenciled THF.R\IAFIFIER <br />hftnerol Wool Botts end beer the thlckneu and othe• related in. <br />formation. <br />111. Evidence Submitted: Fire test report prepersa Lv Wu% . <br />Janney, Elitner and Asad mata, Incorporated, is suhmihe( <br />Recommendation <br />IV. Recommendation, That the One-Hrsur Fire•finbtive Com- <br />bustible Pertiliow with Regular C)psnm Board described In Port <br />It of this report are alternate types of eoistruction to thus# <br />specified In the Uniform Building Code. <br />This recommendation Is subject to annual retsamfnation. <br />Page loft <br />