ASTM C964-2007 Standard Guide for Lock-Strip Gasket Glazing《锁条式密封垫玻璃窗的标准指南》.pdf
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1、Designation: C 964 07Standard Guide forLock-Strip Gasket Glazing1This standard is issued under the fixed designation C 964; 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 indicate
2、s 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 Department of Defense.1. Scope1.1 This guide covers the use of lock-strip gaskets incompliance with Specification C 5
3、42 in walls of buildings notover 15 from a vertical plane. The prime performanceconsiderations are weathertightness against air and waterinfiltration, and structural integrity under wind loads. Includedare terminology, design considerations, and fabrication toler-ances when using lock-strip gaskets
4、in glazing applications.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units in parentheses are for informa-tion only.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
5、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:2C 542 Specification for Lock-Strip GasketsC 716 Specification for Installing Lock-Strip Gaskets andInfill Glazing Mat
6、erialsC 864 Specification for Dense Elastomeric CompressionSeal Gaskets, Setting Blocks, and SpacersC 963 Specification for Packaging, Identification, Ship-ment, and Storage of Lock-Strip GasketsC 1036 Specification for Flat GlassE 283 Test Method for Determining Rate of Air LeakageThrough Exterior
7、Windows, Curtain Walls, and DoorsUnder Specified Pressure Differences Across the SpecimenE 330 Test Method for Structural Performance of ExteriorWindows, Doors, Skylights and Curtain Walls by UniformStatic Air Pressure DifferenceE 331 Test Method for Water Penetration of Exterior Win-dows, Skylights
8、, Doors, and Curtain Walls by UniformStatic Air Pressure Difference3. Significance and Use3.1 This guide provides information and guidelines for thedesign of lock-strip gasket glazing systems. For related stan-dards, see Specifications C 542, C 716, and C 963.4. Comparison to Other Standards4.1 The
9、committee with jurisdiction over this standard is notaware of any comparable standards published by other orga-nizations.DESIGN CONSIDERATIONS5. General5.1 Structural integrity and watertightness of a gasket glaz-ing system is dependent on interaction of the several compo-nents involved. These syste
10、ms should be carefully designedand built.6. Components6.1 The major components of lock-strip gasket glazing andpaneling systems are:6.1.1 The supporting frame of metal, concrete, or otherstructural building materials,6.1.2 Lock-strip gasket, serving as an elastomeric mechani-cal seal and as a retain
11、er for panel or glass, and6.1.3 Glass or panel infill.6.1.4 The design of these components and their accessoriesare interrelated and the total system must be compatible.7. Supporting Frames7.1 Supporting frames are made of many materials, ofwhich the more common are aluminum, steel, and concrete.7.1
12、.1 MetalDie marks, ridges, offsets, and scratches inmetal frames in contact with the gasket lips that could causeleakage should be avoided. Metal in contact with any part ofthe gasket should have sharp edges and burrs removed to avoidthe possibility of damage to the gaskets that could result instruc
13、tural failure through tear propagation. Weathering steelframes used in gasket installations should be coated to prevent1This guide is under the jurisdiction ofASTM Committee C24 on Building Sealsand Sealants and is the direct responsibility of Subcommittee C24.73 on Compres-sion Seal and Lock Strip
14、Gaskets.Current edition approved June 1, 2007. Published July 2007. Originally approvedin 1981. Last previous edition approved in 2002 as C 964 88 (2002)e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AST
15、MStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.corrosion on the surfaces covered by the gasket to a line notless than 3.2 mm (18 in.) bey
16、ond the lip edge when installed.7.1.2 ConcreteGasket lips in contact with protrusions,crazing, form marks, and offsets on concrete surfaces couldcause leakage and glass breakage and such irregularities shouldbe avoided. Concrete frames for lock-strip gaskets should bejointless and are more suitable
17、when precast, as the tolerancesand smooth surfaces required are too exacting for cast-in-placeconcrete. Special forms and meticulous casting procedures arerequired for optimum performance.7.1.2.1 Corner AnglesCorner angles in the plane of theglass should be held to 62 tolerance to properly receive t
18、hegasket lips. See Fig. 1.7.1.2.2 RegletsIt is essential that the recess in the concretebe accurately cast so as to properly receive the spline of thegasket. This can be accomplished with a plastic reglet that hasa removable weakness membrane as shown in Fig. 1. Theremovable membrane maintains the p
19、roper recess shape andkeeps concrete out of the reglet while being cast. The remov-able membrane can be T-shaped, when desirable, with the stemprojecting from the reglet to provide a more convenient meansof attachment to the formwork of the concrete panel. Aftercasting, the weakness membrane is easi
20、ly removed. Plasticreglets are available with flanges extending beyond the gasketlips, providing smooth contact surfaces. An advantage of theplastic flange is the provision of a smooth rigid surface forcontact with the gasket lip. The plastic flanges are buttedtogether at the corners requiring a joi
21、nt which should beproperly aligned and sealed. The exposed plastic flange shouldbe solidly cast into the concrete without any voids or honey-combing at the leading edge of the flange because water couldenter the interface between the flange and the concrete intowhich it is cast.An advantage of the f
22、langeless reglet is that theexposed joint between the flange and the concrete as well as thecorner butt joints are eliminated and the gasket lips make directcontact with the concrete frame. With this concept it isessential to have a continuous smooth surface free of voids orhoneycombing for the gask
23、et lips to seal against because watercould bypass the gasket lip and enter under it. Also importantis to have a sharp arris at the corners of the concrete frame sothat the corners of the gasket lip can properly contact and sealagainst the concrete. When plastic reglets are used, joints inthem could
24、cause leaks unless sealed. When the gasket lips arein direct contact with the concrete, meticulous casting proce-dures and close surveillance are required to assure a properfinish along the contacting surface.7.1.2.3 Frame LugIt is difficult to achieve watertightnesswith a gasket gripping the lug of
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