ASTM_C_846_-_16.pdf

Designation:C84616Standard Practice forApplication of Cellulosic Fiber Insulating Board for WallSheathing1This standard is issued under the fixed designation C846;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the requirements for storing,handling,and application of cellulosic fiber insulating boardproducts.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C208 Specification for Cellulosic Fiber Insulating BoardD1554 Terminology Relating to Wood-Base Fiber and Par-ticle Panel Materials2.2 Federal Specifications:FF-N-105-B with Interim Amendment 4 Nails,Brads,Staples and Spikes:Wire Cut and Wrought3UU-B-790-A Building Paper,Vegetable Fiber:(Kraft,Waterproofed,Water Repellent and Fire Resistant)33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 exterior finishthe shingle,lap,or panel sidingmaterial,masonry veneer,or stucco applied over the sheathingas a protective,decorative exterior finish of the building.3.1.2 fastenersnails,staples,or screws used for applica-tion of the sheathing.3.1.3 framing membersthose portions of the studs,headers,bracing,and blocking which serve to receive thesheathing.Framing members can be wood or metal.3.1.4 regular wall sheathingdescribed in DefinitionsD1554 and Specification C208.It is 4 ft(1.22 m)wide withsquare-cut edges on all sides and12in.(12.7 mm)in thickness.3.1.5 structural wall sheathingdescribed in DefinitionsD1554 and Specification C208.When installed in accordancewith Section 7,it is considered a structural sheathing providingadequate racking resistance.It is 4 ft(1.22 m)wide and12in.(12.7 mm)or2532in.(19.8 mm)in thickness with square-cutedges on all sides.3.1.6 vertical applicationsheathing applied with the longedges parallel to the studs.4.Significance and Use4.1 This standard provides recommendations for the instal-lation in a safe and effective manner.Actual conditions mayvary greatly,and additional care should be taken to ensure asafe and effective installation.4.2 This standard presents requirements that are general innature and considered practical.They are not intended asspecific recommendations.The user should consult the manu-facturer for recommended application methods and procedures.4.3 This standard does not address the applicability ofregulatory limitations.This is the responsibility of the user.5.Materials5.1 Sheathing shall conform to Specification C208.5.2 Nails for application of sheathing to wood framing shallconform to Federal Specification FF-N-105-B,including In-terim Amendment 4,and shall be in accordance with Table 1.1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.40 on InsulationSystems.Current edition approved Sept.1,2016.Published September 2016.Originallyapproved in 1976.Last previous edition approved in 2009 as C846 94(2009).DOI:10.1520/C0846-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Staples for application of12-in.and2532-in.sheathing towood framing shall meet the following requirements:Gage16Thickness,min,in.(mm)0.057(1.45)Width,min,in.(mm)0.063(1.59)Length,min,in.(mm)112(38.1)Crown,min,in.(mm)716(11.1)Pointschisel pointdivergent pointdivergent chisel point5.4 Screws for application of12-in.and2532-in.sheathing on14-gage(0.075-in.)(1.90-mm)to 20-gage(0.036-in.)(0.91mm)steel studs shall meet the following requirements:Head typebugle headHead diameter,min,in.(mm)516(7.94)Length,min,in.(mm)114(31.8)Major diameter,in.(mm)964(3.57)Minor diameter,in.(mm)764(2.78)Pointdrill point5.5 Framing Members shall be of such size and quality as tobe structurally adequate for the type of building being con-structed.5.5.1 Stud spacing shall be 16 in.(0.41 m)or 24 in.(0.61 m)on center depending on code requirements.6.Storage6.1 Sheathing shall be stored f