1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58SpecificationICS 77.140.15; 91.080.40Steel fabric for the reinforcement of concrete BRITISH STANDAR
2、DBS 4483:2005Incorporating Amendment No. 1BS 4483:2005Bars, wire bodiBBritish Concrete SocietyDeGInstiUK CerThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2005 BSI 2007First published October 1985First revision 30 September 2005
3、The following BSI references relate to the work on this British Standard: Committee reference ISE/9/1Draft for comment 04/30109896 DCISBN 0 580 46589 6Precast Concrete Federationpartment of Transport Highways Agencyalvanizers Associationtution of Structural Engineerstification Authority for Reinforc
4、ing SteelsUK Steel AssociationAmendments issued since publicationAmd. No. Date Comments17105 30 April 2007 See forewordCommittees responsible for this British StandardThe preparation of this British Standard was entrusted by Technical Committee ISE/9, Steel for concrete reinforcement, to Subcommitte
5、e ISE/9/1, and fabric for concrete reinforcement, upon which the following es were represented: ritish Coatings FederationBS 4483:2005 BSI 2007ContentsPageCommittees responsible Inside front coverForeword ii1Scope 12 Normative references 13 Terms and definitions 14Symbols 25 Designation 36 Manufactu
6、ring processes 47 Product characteristics 48 Evaluation of conformity 59 Test methods 810 Identification of the manufacturer and steel grade 811 Verification of mechanical properties in the case of dispute 8Annex A (informative) Notation and classification of fabric 9Annex B (normative) Material not
7、 covered by a third party product certification scheme 12Annex C (informative) Comparison of symbols used in this standard with those used in BS EN 1992-1-1:2004 13Figure A.1 Geometric characteristics of purpose-made welded fabric 10Figure A.2 Purpose-made fabric example 11Table 1 List of symbols 3T
8、able 2 Mandrel diameter for the rebend test 5Table 3 Sampling plan for welded fabric 6Table 4 Absolute minimum and maximum values of tensile properties 6Table 5 Recoefficient k as a function of the number (n) of test results (for a reliable failure rate of 5 % p = 0.95 at a probability of 90 % 7Tabl
9、e 6 Agtand Rm/Recoefficient k as a function of the number (n) of test results (for a reliable failure rate of 10 % p = 0.90 at a probability of 90 % 8Table A.1 Preferred range of designated fabric types and stock sheet size 9iBS 4483:2005iirevision of BS 4483:1998, which will be withdrawn on 1 Janua
10、ry 2006. This edition incorporates a full revision of the standard. All steel fabric conforming to this standard is to be made using ribbed bar in accordance with BS 4449:2005 with the exception of the wrapping fabrics D49 and D98 where BS 4482 may be used.BS 4449:2005 grade B500A in sizes below 8 m
11、m does not conform to BS EN 1992-1-1:2004 (Eurocode 2).This standard has been written so that it can be used in conjunction with BS EN 10080:2005. Definitions, symbols, manufacturing processes, routine inspection and testing, test methods, identification of the manufacturer and technical class and v
12、erification in the case of dispute are all taken from BS EN 10080:2005.BS EN 10080:2005 does not define steel grades or technical classes, and requires that these should be defined in accordance with BS EN 10080:2005, by specified values of Re, Rm/Re, Agt, Re,act/Re,nom(where appropriate), fatigue s
13、trength, bend performance, weldability, bond strength, tolerances and dimensions.BS EN 10080:2005 contains an informative Annex ZA, which describes how that standard can be used for the purposes of CE marking of reinforcing steels. Annex ZA and 8.2, 8.3 and 8.4 of BS EN 10080:2005 relate to the role
14、 of the notified body in assessing products for an EC certificate of conformity, and as such are not included in this standard. It is not a requirement of this British Standard that materials produced to it should meet the requirements for CE marking.Where CE marking is required for the purposes of
15、complying with the EU Construction Products Directive, reference ought to be made to BS EN 10080:2005.It is recommended that purchasers specify reinforcing steel that has been manufactured and supplied to a recognized third party product certification scheme. 8.2 specifies the determination of the l
16、ong term quality level under such a scheme. As an alternative, Annex B provides a batch testing method for material which has not been produced under such a scheme.This standard comes into effect on 1 January 2006.This publication does not purport to include all the necessary provisions of a contrac
17、t. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 13 and a back cover.The BSI copyright notice displayed in thi
18、s document indicates when the document was last issued.The start and finish of text introduced by Amendment No. 1 is indicated in the text by tags !“. ForewordThis British Standard has been prepared by Subcommittee ISE/9/1, and is a BSI 2007BS 4483:20051 ScopeThis British Standard specifies requirem
19、ents for sheets of factory-made machine-welded steel fabric for the reinforcement of concrete, manufactured from ribbed bars conforming to BS 4449:2005, or manufactured from wire conforming to BS 4482 for wrapping fabrics D49 and D98.NOTE Where the term “bar” is used in this standard, it includes ba
20、r or decoiled product conforming to BS 4449:2005. For clarity only, it can also include wire conforming to BS 4482 for wrapping fabrics only.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited a
21、pplies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 4449:2005, Steel for the reinforcement of concrete Weldable reinforcing steel Bar, coil and decoiled product Specification.BS 4482, Steel wire for the reinforcement of concrete product
22、s Specification.BS 8666, Scheduling, dimensioning, bending and cutting of steel reinforcement for concrete Specification.BS EN 10080:2005, Steel for the reinforcement of concrete Weldable reinforcing steel General.BS EN ISO 15630-1, Steel for the reinforcement and prestressing of concrete Test metho
23、ds Part 1: Reinforcing bars, wire rod and wires.BS EN ISO 15630-2, Steel for the reinforcement and prestressing of concrete Test methods Part 2: Welded fabric.3 Terms and definitions3.1 welded fabricarrangement of longitudinal and transverse bars of the same or different nominal diameter and length
24、that are arranged substantially at right angles to each other and factory electrical resistance welded together by automatic machines at all points of intersection3.2 characteristic valuevalue of a material or product having a prescribed probability of not being attained in a hypothetical unlimited
25、test series3.3 minimum valuevalue below which no test result shall fall3.4 maximum valuevalue which no test result shall exceed3.5 batchquantity of welded fabric of one type produced by one manufacturer and presented for examination at any one time3.6 factory production controlpermanent internal con
26、trol of production performed by the manufacturer3.7 BSI 20071standard propertyproperty which is part of the routine inspection and test requirements for every test unitBS 4483:20053.8 special propertyproperty which is not determined as part of the factory production control requirements for every te
27、st unit3.9 standard welded fabricwelded fabric reinforcement where the bar and mesh arrangement can be defined by an identifiable fabric reference3.10 purpose made welded fabricwelded fabric manufactured according to users specific requirements3.11 longitudinal barreinforcing steel in the manufactur
28、ing direction of the welded fabric3.12 transverse barreinforcing steel perpendicular to the manufacturing direction of the welded fabric3.13 pitch of welded fabriccentre-to-centre distance of bars in a sheet of welded fabric3.14 overhang of welded fabriclength of longitudinal or transverse bars proj
29、ecting beyond the centre of the outer crossing bar in a sheet of welded fabric3.15 length of a welded fabric sheetlongest side of a sheet of welded fabric, irrespective of the manufacturing direction3.16 width of a welded fabric sheetshortest side of a sheet of welded fabric, irrespective of the man
30、ufacturing direction3.17 bundletwo or more sheets of fabric bound together3.18 nominal diameterdiameter of a circle with an area equal to the nominal cross-sectional area of the bar4 SymbolsA list of symbols used in this standard, reproduced from BS EN 10080:2005, is given in Table 1.2 BSI 2007BS 44
31、83:2005Table 1 List of symbols5 DesignationWelded fabric shall be designated with the following information:a) designation of the product form (welded fabric);b) the number of this British Standard (i.e. BS 4483:2005);c) the nominal dimensions of the product (dimensions of the bars, dimensions of th
32、e sheet, pitch of the bars, overhangs) (see Note);d) the grades of the steel(s) to be used to manufacture the welded fabric.For ordering purposes, the notation specified in BS 8666 shall be used.Symbols Description UnitAnAgtBCvddCdLkReReHRmRm/ReRp0.2sLNCNLPCPLFsRe,actRe,noma1, a2, a3, a4u1, u2u3, u4
33、Nominal cross-sectional areaPercentage total elongation at maximum forceLength of transverse bar in welded fabricSpecified characteristic valueNominal diameter of the reinforcing steelDiameter of transverse bars in welded fabricDiameter of longitudinal bars in welded fabricCoefficient as a function
34、of the number of test resultsAverage value of test resultsYield strengthUpper yield strengthTensile strengthRatio tensile strength/yield strength0.2 % proof strength, non proportional extensionEstimate of the standard deviationLength of longitudinal bar in welded mesh Number of transverse bars in we
35、lded fabricNumber of longitudinal bars in welded fabricPitch of transverse bars in welded fabricPitch of longitudinal bars in welded fabricShear force of welded connections in welded fabricActual value of yield strengthSpecified value of yield strengthIncrement (specified in product specification)Ov
36、erhang of the longitudinal bars in welded fabric Overhang of the transverse bars in welded fabricmm2%mmammmmmmaMPaMPaMPaMPaammmmmmkNMPaMPaammmmaThe unit depends on the property.A comparison between the symbols used in this standard and those used in BS 1992-1-1:2004 is given in Annex C.X BSI 20073NO
37、TE Brief designations are widely used to describe standard welded fabric (see Annex A).Purpose made welded fabric may be described using the indications given in Annex A, or by a fully dimensioned drawing (see Figure A.1) and should be identified by the users reference.BS 4483:20056 Manufacturing pr
38、ocessesAll welded fabric shall be factory made and machine welded. The joints, at the intersection of the longitudinal bars and the transverse bars, shall be made by electrical resistance welding to provide a specified shear resistance.Welded fabric can be composed of a different steel grade in each
39、 direction.7 Product characteristics7.1 Chemical compositionThe chemical composition of the bars shall conform to the requirements of BS 4449:2005.7.2 Mechanical properties of welded fabric7.2.1 GeneralThe characteristic value is (unless otherwise indicated) the lower or upper limit of the statistic
40、al tolerance interval at which there is a 90 % probability (1 = 0.90) that 95 % (p = 0.95) or 90 % (p = 0.90) of the values are at or above the lower limit, or at or below the upper limit respectively. This quality level refers to the long-term quality level of production.7.2.2 Conditions of testing
41、All test pieces shall be in the aged condition.Ageing method: heat the test piece to 100 C, maintain at this temperature (10 C) for a period of 60+150mins, and then cool in still air to room temperature. The method of heating shall be left to the discretion of the manufacturer.7.2.3 Tensile properti
42、esThe specified values for the tensile properties (Re, Rm/Re, Agt) shall be the corresponding specified characteristic value with p = 0.95 for Reand p = 0.90 for Agtand Rm/Re. Tensile properties (Re, Rm/Re, Agt) shall comply with the requirements of 8.1.3.1.Determine Reand Rmusing the nominal cross-
43、sectional area of the product.For yield strength (Re) the upper yield strength (ReH) shall apply. Determine the yield strength (Re) from the 0.2 % proof strength (Rp0.2) if a yield phenomenon is not present.7.2.4 Shear force of welded jointsThe shear force of welded joints in welded fabric shall not
44、 be less than 0.25 Re An, where Reis the specified characteristic yield strength, and Anis the nominal cross-sectional area of the larger bar of the welded joint.For standard fabrics B1131 and C785, the minimum shear force required shall be calculated using the nominal cross-sectional area of the sm
45、aller bar of the welded joint, unless otherwise agreed at the time of enquiry, in which case, the minimum shear force required may be calculated using the nominal cross-sectional area of the larger bar.7.2.5 Bend performanceBend performance shall be demonstrated by means of the following rebend test
46、 method (from BS EN ISO 15630-1).Bend the test pieces through an angle of 90, around a mandrel with a diameter not exceeding those specified in Table 2, age the test piece and then bend back by at least 20. The bend test shall be conducted Text deleted!“!For wrapping fabrics D49 and D98 a minimum yi
47、eld strength only, in accordance with BS 4482, is required. “4 BSI 2007on the thicker bar.After the test the specimen shall show no sign of fracture or cracks to a person of normal or corrected vision.BS 4483:2005Table 2 Mandrel diameter for the rebend test7.3 Dimensions, mass and tolerances7.3.1 Th
48、e relative diameters of bars in a sheet of fabric shall meet the following requirement:dminU 0.6dmaxwhere dmaxis the nominal diameter of the thickest bar and dminis the nominal diameter of the crossing bar.Other requirements may be agreed at the time of enquiry and order.7.3.2 The cross-sectional ar
49、ea and mass of an individual sheet shall be derived from the specified dimensions of the sheet, the nominal bar sizes and the specified pitches for the bars.The pitch of longitudinal bars and transverse bars shall not be less than 50 mm.The permitted deviations for welded fabric are:7.3.3 Missing bars resulting from test sampling in accordance with this standard shall not be considered a defect.7.3.4 The number of broken welds shall not exceed 4 % of the total number of cr
