1、Designation: C 1002 07Standard Specification forSteel Self-Piercing Tapping Screws for the Application ofGypsum Panel Products or Metal Plaster Bases to WoodStuds or Steel Studs1This standard is issued under the fixed designation C 1002; the number immediately following the designation indicates the
2、 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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Dep
3、artment of Defense.1. Scope*1.1 This specification covers steel self-piercing tappingscrews for use in fastening gypsum panel products and metalplaster bases to cold-formed steel studs less than 0.033 in.(0.84 mm) in thickness and wood members and for fasteninggypsum panel products to gypsum board.1
4、.2 This specification also covers test methods for determin-ing performance requirements and physical properties.1.3 The values stated in inch-pound units are to be regardedas the standard. The SI (metric) values given in parentheses areapproximate and are for information only.1.4 The following safe
5、ty hazards caveat pertains only to thetest methods described in this specification: This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determ
6、ine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A 548 Specification for Steel Wire, Carbon, Cold-HeadingQuality for Tapping or Sheet Metal Screws3A 568/A 568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-R
7、olled andCold-Rolled, General Requirements forC11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 1396/C 1396M Specification for Gypsum BoardC 645 Specification for Nonstructural Steel Framing Mem-bersC 847 Specification for Metal Lath3. Terminology3.1 Definitions: For de
8、finitions relating to gypsum andrelated building materials and systems, see Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 self-piercing, vthe ability to penetrate without ben-efit of a pre-drilled hole with sharp-point angles of not morethan 30.3.2.2 spin-out, vfor a screw
9、, the continued rotation of ascrew without further penetration into the substrate.4. Classification4.1 Steel screws covered by this specification are of fourtypes of thread configurations:4.1.1 Type G, course-pitch high-thread self-piercing screwsfor fastening gypsum board to gypsum board.4.1.2 Type
10、 S, fine-thread screw for fastening gypsum boardto cold formed steel members.4.1.3 Type W, course-thread screw for fastening gypsumboard to wood members.4.1.4 Type A, course-pitch tapping screw thread for fasten-ing metal plaster bases to wood or cold-formed steel.5. Materials5.1 Steel Wire, for man
11、ufacturing screws, SpecificationA 548, Grades 1013 to 1022 for Type G and Type W screws.5.2 Steel Wire, for manufacturing screws, SpecificationA 568/A 568M, Grades 1018 to 1022 for Type S and Type Ascrews.6. Physical Properties6.1 Hardness:6.1.1 The surface of Type S, Type W, and Type A screwsshall
12、be case hardened to a depth of not less than 0.002 in.(0.05 mm) with case hardness not less than 45 HRC.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and
13、 Test Methods for Accessories andRelated Products.Current edition approved Aug. 1, 2007. Published August 2007. Originallyapproved in 1983. Last previous edition approved in 2004 as C 1002 04.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at ser
14、viceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
15、8-2959, United States.6.1.2 The surface of Type G screws is not required to becase hardened.6.2 DuctilityThe screws shall have sufficient ductility tobe able to withstand a 10 bend without visible signs of fracturewhen tested as specified in 12.6.7.7. Performance Requirements7.1 Type G Screws:7.1.1
16、Screws shall be able to self-pierce and drive intogypsum panel products.7.1.2 Screw threads shall be adequate to pull the head of thescrew below the surface of the gypsum panel product whentested as specified in 12.6.2.7.2 Type S Screws:7.2.1 GeneralScrews shall be able to self-pierce and driveinto
17、cold-formed steel members in less than 2 s, when tested asspecified in 12.6.3.1.7.2.2 Screws for Fastening Gypsum Panel ProductsScrewthreads shall be adequate to pull the head of the screw belowthe surface of the gypsum panel product, without spin-out,when tested as specified in 12.6.3.1.7.3 Type W
18、Screws:7.3.1 GeneralScrew threads shall be able to self-pierceand drive into wood members.7.3.2 Screws for Fastening Gypsum Panel ProductsScrewthreads shall be adequate to pull the head of the screw belowthe surface of the gypsum panel product, without spin-outwhen tested as specified in 12.6.4.1.7.
19、4 Type A Screws:7.4.1 GeneralScrew shall be able to pierce and drive intowood or cold-formed steel members.7.4.2 Screws for Fastening Metal Plaster BasesScrewthreads shall be adequate to pull a metal plaster base tightlyenough against the face of a wood or steel stud, withoutspin-out, so that when s
20、ubjected to a steady pull, the plasterbase will tear before slipping out from under the screw head,when tested in accordance with 12.6.5.1 or 12.6.5.2.8. Dimensions and Permissible Variations8.1 Head Diameter:8.1.1 GeneralHeads shall be permitted to be out of roundnot more than 0.02 in. (0.51 mm).8.
21、1.2 Screws for Fastening Gypsum BoardNot less than0.315 in. (8 mm).8.1.3 Screws for Fastening Metal Plaster BasesNot lessthan 0.437 in. (11.1 mm).8.2 Head Contour:8.2.1 Screws for Fastening Gypsum Panel ProductsThetop of the head shall be flat. The outer flange thickness shall be0.025 6 0.005 in. (0
22、.64 6 0.13 mm). The contour beneath theflange head shall be such that the screw head shall be able tobe driven so that the head of the screw rests immediately belowthe surface of the gypsum panel product.8.2.2 Screws for Fastening Metal Plaster BasesThe top ofthe screw shall be either flat or contou
23、red. The underside of thehead shall be flat or near flat. The threads shall extend to theunderside of the head.8.3 Driving Recess:8.3.1 Screws for Fastening Gypsum BoardNo. 2 “Phil-lips” design, depth of recess, not less than 0.104 in. (2.64 mm).8.3.2 Screws for Fastening Metal Plaster BasesNo. 2“Ph
24、illips” design, depth of recess, not less than 0.077 in. (1.95mm).8.3.3 Determine depth of recess with a Phillips penetrationdepth gage.8.3.4 Other types of screw-driving recesses having perfor-mance values equal to those of the recesses specified areacceptable.8.4 Shank DiameterNot less than No. 6,
25、 with majordiameter not less than 0.136 in. (3.45 mm).8.5 Length:8.5.1 Nominal LengthThe nominal length shall be theminimum length.8.5.2 Type W and Type A screws shall be long enough topenetrate wood members not less than58 in. (15.9 mm).8.6 ThreadsEither single or multiple thread design.8.7 PointsS
26、elf-piercing design.9. Finish and Appearance9.1 FormThe form shall be straight and neatly formed.9.2 ThreadsThe threads shall be clean and smooth.9.3 FinishScrews shall have a corrosion-resistant treat-ment. The treatment shall not inhibit adhesion to finishingcompounds nor bleed through field-appli
27、ed decoration.10. Sampling10.1 Obtain not less than 90 screws from not less than fivecontainers.11. Number of Tests and Retests11.1 Test a minimum of five screws for each test. If any ofthe first lot fails, test 25 more screws.11.2 If two or more of the second lot fail the second test,then the repre
28、sented lot fails to meet the specified require-ments.12. Test Methods12.1 The following test methods set forth procedures usedto determine the ability of the screws to pierce through gypsumpanel and metal plaster base and into the backup materialwithout spin-out.12.1.1 The test methods can also be u
29、sed to determinewhether or not alternate screw driving recesses will haveperformance values equal to those of the “Phillips” recessspecified.12.2 Significance and UseThe test methods provide pro-cedures for evaluating the physical properties and performancerequirements of steel self-piercing screws.
30、 The degree ofcorrelation between these tests and service performance has notbeen determined.12.3 Apparatus:12.3.1 Screw GunStandard manufacture electric screwgun, turning at a minimum of 2500 r/min.12.3.2 Timing DeviceStandard stopwatch, calibratedin110 s.12.3.3 ViceStandard machinists vice, not le
31、ss than 3 in.(76 mm).C100207212.3.4 ClampLocking pliers (“Vice-Grip”), 6 in. (152mm).12.4 Materials:12.4.1 Gypsum WallboardSpecification C 1396/C 1396M, Type X,58 in. (16 mm) thick.12.4.2 Metal LathAs in Specification C 847, diamondmesh, weight 2.5 lb/yd2(1.4 kg/m2).12.4.3 Steel StudAs in Specificat
32、ion C 645, 0.0179 in.(0.455 mm) thick, hardness not less than 52 HRB, size 358 in.(92.1 mm).12.4.4 Wood StudDouglas fir, construction grade, 2 by 4or 2 by 6, nominal, containing not less than 16 % nor more than19 % free moisture as determined by a suitable moisture meter.12.4.5 Kraft Paper0.01 in. (
33、0.25 mm) thick, 2 in. (51mm) square.12.5 Specimen Preparation:12.5.1 Cut 6-in. (152-mm) square specimens from a sheet ofgypsum wallboard not less than 12 in. (305 mm) away from theedge or end.12.5.1.1 Weigh the specimens to within 1 g, and thencondition at a temperature of 85 6 15 F (29.5 6 5.5 C) i
34、n anatmosphere having a relative humidity of 50 6 2 %. Individu-ally test the specimens after constant weight is reached.12.5.2 Cut 6 in. (152 mm) square specimens from a sheet ofmetal lath not less than 4 in. (102 mm) away from the edge orend.12.5.3 Cut 12 in. (305 mm) long specimens from a length
35、ofa steel stud.12.5.4 Cut 12 in. (305 mm) long specimens from a length ofwood stud.12.6 Procedure:12.6.1 General: Drive the screws not closer than58 in. (16mm) from the edges of the gypsum wallboard and not closerthan 2 in. (50 mm) from the edges of the metal lath.12.6.2 Type G Screw TestRigidly sup
36、port two pieces ofgypsum board sandwiched together. With a screw gun, drivethe screw specimen into the gypsum boards, so that the head ofthe screw is below the surface of the gypsum board.12.6.2.1 When driving Type G screw specimens, use theforce of less than 20 lbf (89 N).12.6.2.2 Interpretation of
37、 ResultsObserve if the screwsare pulled below the surface of the gypsum board. If any of thefive screws fail, the lot has failed the test. Retest in accordancewith Section 11.12.6.2.3 ReportReport whether the lot has passed orfailed the test.12.6.2.4 Precision and BiasNo information is presentedabou
38、t either the precision or the bias for the Type G screw testfor pulling the screw head below the surface of the gypsumboard because the test result is non-quantitative.12.6.3 Type “S” Screws Test for Fastening Board to Steel:12.6.3.1 When driving Type S screws use a force of 30 lbf(133N).12.6.3.2 Ri
39、gidly support a piece of gypsum wallboard asdescribed in 12.4.1 over a length of steel stud as described in12.4.3. With a screw gun as described in 12.3, drive five screwspecimens through the wallboard and into the steel. Measurethe length of time it takes to drive each screw so that the screwhead i
40、s below the surface of the gypsum board and observe ifthere was spin-out.12.6.3.3 Interpretation of ResultsCalculate the averagetime to drive the five screw specimens through the wallboardand into the steel. If any of the five specimens fail to pull thescrew head below the surface of the gypsum boar
41、d or spins out,or if the average time is more than 2 s, the lot has failed. Retestin accordance with Section 11.12.6.3.4 ReportReport whether the lot has passed orfailed the test and the reason for failure.12.6.3.5 Precision and BiasNo information is presentedabout either the precision or the bias f
42、or the Type S screw testfor measuring spin-out or pulling the screw head below thesurface of the gypsum board, because the test result innon-quantitative. No information is presented about either theprecision or the bias for the Type S screw test for measuring thetime to drive the screw because no m
43、aterial having anacceptable reference value is available.12.6.4 Type A Screws for Fastening Metal Lath to Steel:12.6.4.1 When driving Type A screws, use a force of 30 lbf(133 N).12.6.4.2 Rigidly support a piece of metal lath over a steelstud specimen. With a screw gun, as described in 12.3, drivethe
44、 five screw specimens through each of the five pieces ofmetal lath, and into the steel. Measure the length of time ittakes to drive the screws and observe if there was spin-out.Grasp the metal lath with the locking pliers and pull steadily ina plane parallel to the plane of the lath. Observe whether
45、 thelath tears before it slips out from under the screw head.12.6.4.3 Interpretation of ResultsCalculate the averagetime to drive the five screw specimens through the metal lathinto the steel. If any of the five specimens fails to pull the screwhead through the metal lath and into the steel, or spin
46、s out, orif the average time is more than 2 s, or if the metal lath fails totear when pulled, the lot has failed.12.6.4.4 Precision and BiasNo information is presentedabout either the precision or the bias for the Type A screw testfor measuring spin-out or pulling the screw head below thesurface of
47、the gypsum board, because the test result isnon-quantitative. No information is presented about either theprecision or the bias for the Type A screw test for measuringthe time to drive the screw because no material having anacceptable reference value is available.12.6.5 Type A Screws for Fastening M
48、etal Lath to Wood:12.6.5.1 When driving Type A screws, use a force of 30 lbf(133 N).12.6.5.2 Rigidly support a piece of metal lath over a lengthof wood stud as described in 12.4.4. With a screw gun asdescribed is 12.3, drive the five screw specimens through eachof the five pieces of metal lath and i
49、nto the wood stud. Observeif there was spin-out. Grasp the metal lath with the lockingpliers and pull steadily in a plane parallel to the plane of thelath. Observe whether the lath tears before it slips out fromunder the screw head.12.6.5.3 Interpretation of ResultsIf any of the five speci-mens fails to pull the screw head through the metal lath andC1002073into the wood, or spins out, or if the metal lath fails to tearwhen pulled, the lot has failed. Retest in accordance withSection 11.12.6.5.4 Precision and BiasNo information is p
