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6)and optional at remaining stud bcations. 6.Lead Discs or Talx—(NOt Shown,For Use WKh Rsm 4D)-Used in lieu of or in additbn to[he lead batten strips(Item 5)or optional at other bcatbns-Max 3/4 in.didm by max 0.125 in.thick lead discs compression fitted or adhered over � � steel screw heads or max 1/2 in.by 1-1/4 in,by max 0.125 in,thkk lead tabs placed on gypsum boands(Item 4D) undemeath screw bcations prior to the instaNation of the serews.Lead discs or tabs to have a purity of 99.9°�meeting the Federal specification QQ-L-201f,Grade"C". 6A.Lead D1scs—(Not Shown,for use with Rem 4H)Max 5/16 fn.diam by max0.140 in.thkk lead discs compressan fitted or adhered over steel screw heads.Lead discs to have a purtty of 99.9%meeting the Fede21 Specification QQ-L-201f,Grades"A,B,C or D". 7.Mineral and Fiber Board*—(Optbnal,Not shown)�—For optbnal use as an additional layer on one side of wall.Nom 1/2 in.thkk,4 R wfde wkh bng dimensbn pardikl and centered over studs.Attached to studs and floor and ceiling runners with 1-5/8 in,bng Type S steel screws,spaced 12 in.OC.71�e required UL Ciassified gypsum board layer(s)is/are to be installed as indkated as to fastener type and spacinq,except that the required fastener length shall be increased by a minimum of 1/2 in.Not evaluated or intended es a SubStKute fOr the required Wyer(s)of UL Classified Gypsum Board. HOMASOTE CO—Homasote Type 440-32 *Bearing the UL ClassiFlcation Mark Last Uodated on 2012-07-17 Questbrn? Print this oaae Tgrtns Q�i� Paae Too �O 2012 UL LLC When the UL Leaf Maric is on the product,or when the word"Environm�nt"i�inCluded in the UL Mark,please sea2h the l�s Environmen±da a ��P for additional�formation regarding this product's certiFlCatfon. The appearance of a company's name or product in this database daes nok in Itself assure that products so identified have been manufactured under UL's Folbw-Up Service.Ony those products bearing the UL Mark 5hould be considered to be Listed and covered under UL's Folbw-Up Servke.Always bok for the Mark on the product. U�permits the reproductbn of the material contained k�the OnNne Certificatbn Directory subject to the folbwing conditbns: 1.The Guide Informatfon,Designs and/or Listings(Flles)must be presented in th�k�entirety and in a non-misleading manner,without any manipulation of the data (or drawings).2.The statement"Reprinted from the Online Certiflcatians DMectory with pertnissbn from UL"must appear adjacent to the eutracted material.In additbn,the reprinted material must include a Copyrfght notke in the foNowing fortnat: "�O 2012 UL LLC". 7 Of 7 7/25/2012 2:52 PM