BS 4483:2005 pdf download

BS 4483:2005 pdf download.Steel fabric for the reinforcement of concrete ——Specification.
9 Test methods
For welded fabric, the requirements of ItS EN ISO 15630.2 apply regarding the tensile test. rebend test, the determination of shear force of joints and the methods for chemical analysis. Measurement of the surface geometry and the determination of the relative rib area f shall be in accordance with
ItS EN ISO 15630-1.
10 Identification of the manufacturer and steel grade
The manufacturer’s identification mark applied to the individual bars shall be as described in
ItS 4449:2005.
In addition to the manufacturer’s identification marks applied to the individual bars, a label shall be attached to the’ welded fabric to indicate the manufnc’turcr of the welded fabric and the steel grade(s).
11 Verification of mechanical properties in the case of dispute
11.1 Whenever the determination of a property specified in this standard as a characteristic value creates a dispute, the value shall be verilied by selecting and testing three test pieces from various sheets from the batch under examination.
If one’ test result is less than the’ specified characteristic value’, both the’ test. piece and the teat method shall be carefully examined. If there isa local fault in the test piece or reason to believe that an error has occurred in the test, the test results shall be ignored. In this case a furthe’r single test shall be carried out.
If the three valid test results are equal or greater than the specified characteristic value the batch shall he deemed to conform to this standard. If not, the requirements of 11.2 shall apply.
11.2 If 11.1 is not fulfilled, 10 additional teat pieces shall be selected from difTerent shetis in the’ batch. The hatch shall be deemed to conform to this standard if the average test result of the 10 test pieces is higher than the characteristic value’ and the individual values are higher than the minimum and lower than the maximum values given in either ItS 4449:2005 or this standard as appropriate.
If not, the batch shall be rejected.
Annex B (normative)
Material not covered by a third party product certification scheme
B.1 General
Material not covered by a third party product certification scheme shall be assessed by acceptance tests on each hatch. Sampling and testing shall he carried nut by an independent organization at the producer’s works or in the stockholder’s yard.
B.2 Extent of sampling and testing
For testing purposes, the hatch shall be divided into test units with a maximum mass of 50t. Each test unit shall comprise products of the same steel grade (or grades) and type of fabric. The manufacturer shall certiI’ that all products in the test unit originate from the same production batch.
Test specimens shall be taken from each test unit as follows
a) twenty specimens br 80 specimens if appropriate. see B.4.lb)J from different sheets of fabric. for testing in accordance with B.3a) and B.3h:
b) four test specimens, from different fabrics, for testing in accordance with B.3c).
Preparation of the test specimens shall be carried out as described in 7.2.2.
B.3 Properties to be tested
Specimens selected in accordance with 11.2 shall he tested for the following.
a) inspection by t’ariabks,
I) yield strength R,.:
2) tensile/yield strength ratio R1R,,.
3) total elongation at maximum force 4. b) inspection by aitrihuws:
I) behaviour in the rebend test:
2) deviations from the nominal cross section:
3) rib geometry/band test;
4) shear force of welded joints.
C) Chemical composition according to the product analysis.
All elemenLs listed in ItS 4449:2005 or 118 4482, as appropriate, and the carbon equivalent shall be determined.
The test procedures shall be in accordance with Clause 9
11,4 Evaluation of results
11.4.1 inspection by variables
Inspection by vanables shall be camed out as follows:
a) The following shall be determined for the performance characteristics listed in B.3a):
I) all individual values for each of the performance characteristics:
2) the mean value rn5j for each of the performance characteristics:
3) the standard deviation S for each performance characteristic.
The test unit shall be deemed to conform to this British Standard if the following conditions.