1、Designation:C128012aC128013 Standard Specication for Application of Exterior Gypsum Panel Products for Use as Sheathing 1 This standard is issued under the xed designation C1280; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the
2、 year of last revision.Anumber in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 This specication covers the minimum requirements for and methods of application of exterior gypsum panel pro
3、ducts that are specically designed for use as a substrate for exterior cladding. 1.1.1 This specication does not cover gypsum panel products that are specically designed for interior applications. 1.2 Details of construction for a specic assembly to achieve the required re resistance shall be obtain
4、ed from reports of re-resistance tests, engineering evaluations, or listings from recognized re testing laboratories. 1.2.1 This specication shall govern where it is more stringent (size or thickness of framing and size and spacing of fasteners) than the re-rated construction. 1.3 Wheresoundcontroli
5、srequiredforagypsumpanelproductassembly,thedetailsofconstructionshallbeinaccordancewith the acoustical test report of an assembly that has met the required acoustical value(s). 1.3.1 This specication shall govern where it is more stringent (size or thickness of framing and size and spacing of fasten
6、ers) than the sound-rated construction. 1.4 Whereresistancetorackingloadsorshearisrequiredforagypsumpanelproductassembly,thedetailsofconstructionshall be in accordance with the racking or shear test report of an assembly that has met the required racking or shear value(s). 1.4.1 This specication sha
7、ll govern where it is more stringent (size or thickness of framing and size and spacing of fasteners) than the racking or shear-tested construction. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that
8、 are provided for information only and are not considered standard. 1.6 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard. 1.7 This standard does not purport to address all of the safety concerns, if any
9、, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: 2 C11Terminology Relating to Gypsum and Related Bu
10、ilding Materials and Systems C954Specication for Steel Drill Screws for theApplication of Gypsum Panel Products or Metal Plaster Bases to Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness C955Specication for Load-Bearing (Transverse andAxial) Steel Studs, Runners (Tracks), and
11、 Bracing or Bridging for Screw Application of Gypsum Panel Products and Metal Plaster Bases C1002Specication for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs C1007Specication for Installation of Load Bearing (Tran
12、sverse and Axial) Steel Studs and Related Accessories C1063Specication for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster 1 This specication is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is
13、 the direct responsibility of Subcommittee C11.03 on Specications for the Application of Gypsum and Other Products in Assemblies. Current edition approved July 15, 2012Feb. 15, 2013. Published September 2012March 2013. Originally approved in 1994. Last previous edition approved in 20112012 as C12801
14、1.C128012a. DOI: 10.1520/C1280-12A.10.1520/C1280-13. 2 ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatserviceastm.org.ForAnnualBookofASTMStandards volume information, refer to the standards Document Summary page on the ASTM website. This document is not anA
15、STM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In
16、all cases only the current version of the standard as published by ASTM is to be considered the official document. *ASummary of Changes section appears at the end of this standard Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 1C1177
17、/C1177MSpecication for Glass Mat Gypsum Substrate for Use as Sheathing C1278/C1278MSpecication for Fiber-Reinforced Gypsum Panel C1396/C1396MSpecication for Gypsum Board 2.2 U.S. Department of Commerce Publication: PS20American Softwood Lumber Standard 3 3. Terminology 3.1 DenitionsDenitions shall b
18、e in accordance with Terminology C11. 3.2 Denitions of Terms Specic to This Standard: 3.2.1 exterior cladding, na permanent material or system that impedes the transmission of environmental elements to the gypsum panel products used as sheathing. 3.2.2 fastener, nnails, staples, or screws used for a
19、pplication of the gypsum panel product. 3.2.3 framing member, nstuds, headers, bracing, and blocking that serve to receive the gypsum panel product. 3.2.4 horizontal application, na synonym for perpendicular application. 3.2.5 parallelapplication,ngypsumpanelproductappliedwiththefactoryedgesparallel
20、totheframingmembers;asynonym for vertical application. 3.2.6 perpendicular application, ngypsum panel product applied with the factory edges at right angles to the framing members; a synonym for horizontal application. 3.2.7 require, vto mandate by a force outside this specication, such as a buildin
21、g code, project specication, contract, or purchase order. 3.2.8 specied, adjpertaining to a mandatory requirement of this specication or a referenced requirement. 3.2.9 specify, vto mandate by an obligation of this standard or a referenced document. 3.2.10 vertical application, nsynonym for parallel
22、 application. 3.2.11 weather-resistive barrier, na temporarily exposed protective membrane that is intended to impede the penetration of environmental elements until the installation of a permanent exterior cladding. 4. ExposureAfter Installation 4.1 Gypsum sheathing board is a paper faced substrate
23、 that shall be covered by an exterior cladding or other weather-resistive barrier and is not intended for long-term exposure. It shall not be exposed to the elements for more than 30 days after it has been installed.Gypsumsheathingshallbecoveredwithaweather-resistivebarrierwithin30daysiftheexposuret
24、imewillbemorethan 30 days. NOTE 1Some building codes require an additional weather-resistive barrier.The exterior face paper of the sheathing shall be dry prior to application of the additional weather-resistive barrier. 4.2 Water-ResistantExteriorFiber-ReinforcedGypsumSheathingPanelsprovideasubstra
25、tethatshallbecoveredbyanexterior cladding or other weather-resistive barrier and is not intended for long-term exposure. Refer to manufacturers recommendations for maximum exposure time. Water-Resistant Exterior Fiber-Reinforced Gypsum Sheathing Panels shall be covered with a water-resistive barrier
26、 if exposure time is expected to exceed the manufacturers recommended maximum exposure time. 4.3 GlassMatGypsumSubstrateforUseasSheathingprovidesasubstratethatshallbecoveredbyanexteriorcladdingorother weather-resistive barrier and is not intended for long-term exposure. Refer to manufacturers recomm
27、endations for maximum exposure time. Glass Mat Gypsum Substrate for Use as Sheathing shall be covered with a water-resistive barrier if exposure time is expected to exceed the manufacturers recommended maximum exposure time. 5. Materials and Manufacture 5.1 Gypsum SheathingSpecication C1396/C1396M,
28、Section 9. 5.1.1 Type X (Special Fire-Resistant) Gypsum SheathingGypsum sheathing that provides a greater degree of re resistance than regular gypsum sheathing as dened in Specication C1396/C1396M. 5.2 Water-Resistant Exterior Fiber-Reinforced Gypsum Sheathing PanelsSpecication C1278/C1278M, Section
29、 8. 5.2.1 Type X (Special Fire-Resistant) Water-Resistant Exterior Fiber-Reinforced Gypsum Sheathing PanelsWater-resistant exterior ber-reinforced gypsum sheathing panels that provide a greater degree of re resistance than regular water-resistant ber-reinforced gypsum sheathing panels as dened in Sp
30、ecication C1278/C1278M. 5.3 Glass Mat Gypsum Substrate for Use as SheathingSpecication C1177/C1177M. 3 Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. C128013 25.3.1 Type X Glass Mat Gypsum Substrate for Use as Sheat
31、hingGlass Mat Gypsum Substrate for Use as Sheathing that provides a greater degree of re resistance than regular Glass Mat Gypsum Substrate for Use as Sheathing as dened in Specication C1177/C1177M. 5.4 FastenersFasteners shall be as described in 5.4.1 through 5.4.3. The fastener length shall be not
32、 less than that specied in Table 1. 5.4.1 NailsNails shall be not less than 12-gauge galvanized, 7 16-in. (11-mm) diameter head. 5.4.2 Screws: 5.4.2.1 Screws for fastening gypsum panel products to wood framing members, and to steel framing members less than 0.033 in. (0.84-mm) in thickness, shall me
33、et the requirements of Specication C1002. 5.4.2.2 Screws for fastening gypsum panel products to steel framing members from 0.033 to 0.112-in. (0.84 to 2.84-mm) in thickness shall meet the requirements of Specication C954. 5.4.2.3 Trim-head screws shall not be permitted for the attachment of gypsum p
34、anel products. 5.4.2.4 Screws for fastening self-furred metal lath over gypsum panel products as described in 8.2.7 shall be as specied in Specication C1063. 5.4.3 StaplesStaples shall be of galvanized steel, not less than 16-gauge, 7 16-in. (11-mm) wide crown outside measurement. Legs shall have di
35、vergent points. 5.5 Framing Members: 5.5.1 Wood FramingWood framing members shall conform to PS20. 5.5.2 Steel FramingLoad-bearing steel framing shall meet the requirements of Specication C955. 6. Substrate, Surface Preparation 6.1 The maximum spacing for framing members for gypsum panel products sh
36、all be not more than 24-in. (610-mm) on center on walls. 6.1.1 Wood framing shall be straight and true, attached securely following accepted engineering practices and as required for the intended design. The surfaces to which abutting edges or ends of gypsum panel products are to be attached shall b
37、e not less than 1 1 2-in. (38-mm) wide. The bearing surface shall be not less than 3 4-in. (19-mm) for internal corners or angles. 6.1.2 Load-bearing metal framing members shall be of the proper size and design for their intended use and shall be installed in accordance with Specication C1007. 7. Fr
38、amingAlignment 7.1 Framingmembersshallbeinstalledsothatthesurfacewillbeinanevenplane,unlessotherwisespecied,afterthegypsum panel products have been applied. TABLE 1 Minimum Fastener Lengths Framing Type Fastener Type Sheathing Thickness, in. (mm) Minimum Fastener Length, in. (mm) Wood Nails 1 2 (12.
39、7) 1- 1 2 (38) 5 8 (15.9) 1- 3 4 (45) Screws 1 2 (12.7) 1- 1 4 (32) 5 8 (15.9) 1- 1 4 (32) Staples A 1 2 (12.7) 1- 1 2 (38) 5 8 (15.9) 1- 3 4 (45) Steel Screws 1 2 (12.7) 1 (25) 5 8 (15.9) 1- 1 4 (32) TABLE 1 Minimum Fastener Lengths Framing Type Fastener Type Sheathing Thickness, in. (mm) Minimum F
40、astener Length, in. (mm) Wood Nails 1 2 (12.7) 1- 1 2 (38) 5 8 (15.9) 1- 3 4 (45) Screws 1 2 (12.7) 1- 1 4 (32) 5 8 (15.9) 1- 1 4 (32) Staples A 1 2 (12.7) 1- 1 2 (38) 5 8 (15.9) 1- 3 4 (45) Steel Screws 1 2 (12.7) 1 (25) 5 8 (15.9) 1- 1 4 (32) A Staples shall be used to apply only Gypsum Sheathing
41、board meeting Speci- cation C1396/C1396M. C128013 38. Cutting andApplication of Gypsum Panel Products 8.1 Cutting Gypsum Panel Products: 8.1.1 The gypsum panel products shall be cut by scoring and breaking or by sawing, working from the face side. The face of faced gypsum panel products shall be cut
42、 with a sharp knife or other suitable tool when cutting by scoring. The gypsum panel product shall be broken by snapping the gypsum panel product in the reverse direction or by cutting the facer on the back surface with a knife or suitable tool. 8.1.2 The cut edges and ends of gypsum panel products
43、shall be trimmed to obtain neat tting joints when installed. 8.1.3 Holes for pipes, xtures, or other small openings shall be scored on the face before removing the cutout with a saw or special tool designed for this purpose. 8.1.4 Where gypsum panel products meet projecting surfaces, the gypsum pane
44、l product shall be scribed and cut neatly. 8.2 Application of Gypsum Panel Products: 8.2.1 Gypsum panel products shall be tted snugly around all window and door openings. 8.2.1.1 Gypsum panel product joints shall be offset a minimum of 4-in. (100-mm) from the edge of any opening. 8.2.1.2 Gypsum pane
45、l products shall be ashed at openings so that water intrusion will not contact the gypsum panel product. 8.2.2 All vertical end and edge joints shall abut over the centers of framing members and shall be offset a minimum of one framing space between adjacent rows of gypsum panel products. 8.2.3 Cont
46、rol Joints: 8.2.3.1 Control joints shall be provided in wall runs exceeding 30-ft (9100-mm) (9 m) in length. The distance between control joints shall be not more than 30-ft (9100-mm).(9 m). 8.2.3.2 Control joints shall be installed in walls wherever there is a building construction joint or where r
47、equired. 8.2.3.3 The location of the control joints shall be as required by either the building design or the exterior cladding specied. 8.2.3.4 Control joints, other accessories, and metal plaster base shall be fastened through gypsum panel products to framing members. 8.2.4 Gypsum panel products,
48、4-ft (1220-mm) wide, shall be applied either parallel or perpendicular to framing members. 8.2.4.1 Square edge gypsum panel products applied perpendicular to framing members shall be covered with a water-resistive barrier, or horizontal joints shall be sealed. 8.2.5 Tongue and groove gypsum panel pr
49、oducts shall be applied with the long dimension perpendicular to framing members, with the grooved edges down, interlocking the tongue of the gypsum panel product below without forcing. 8.2.6 Application of Gypsum Panel ProductsFasteners shall be spaced not more than 8-in. (200-mm) on center along vertical ends or edges and intermediate supports. The length of fasteners shall be as indicated in Table 1. 8.2.6.1 Gypsum sheathing board shall be applied with nails,
