BS 7973-1:2001
$102.76
Spacers and chairs for steel reinforcement and their specification – Product performance requirements
| Published By | Publication Date | Number of Pages |
| BSI | 2001 | 18 |
This part of this British Standard specifies product performance requirements for spacers and chairs sufficient to achieve and maintain cover to reinforcement in in situ reinforced concrete members subject to normal construction loads when used in accordance with BS 7973-2.
NOTE Where appropriate, the basic principles can be applied to precast concrete or proprietary systems.
Product requirements for spacers and chairs include their dimensions, identification, point load strength, permanent deflection after loading, stability and fixity.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references 3 Terms and definitions 3.1 cover 3.2 spacer 3.3 end spacer 3.4 line spacer 3.5 rib spacer |
| 6 | 3.6 wheel spacer 3.7 clip-on spacer 3.8 wire-on spacer 3.9 chair 3.10 individual chair 3.11 continuous chair 3.12 circular chair 3.13 welded fabric 4 Designations and symbols |
| 7 | 5 Spacers and chair categories and applications Table 1 Applications for spacers and chairs in terms of category 6 General requirements for spacers and chairs 6.1 Materials of manufacture 6.2 Requirements for non-cementitious spacers 6.3 Requirements for cementitious spacers 6.4 Requirements for steel chairs 7 Dimensions 7.1 Preferred spacer and chair dimensions |
| 8 | 7.2 Dimensional tolerances for spacers 7.3 Dimensional tolerances for chairs 7.4 Identification of the cover dimensions 7.5 Wire-on spacers 7.6 Clip-on spacers 7.7 Chairs 8 Stability 8.1 The stability of a clip-on spacer, other than a clip-on wheel spacer, shall be provided by ha… 8.2 Clip-on wheel spacers do not require a minimum radius of rotation perpendicular to the bar as… |
| 9 | Figure 1 Geometrical requirements of clip-on spacers and wheel spacers |
| 10 | 9 Load bearing capacity 10 Fixity 10.1 Wire-on spacers and chairs 10.2 Clip-on spacers Figure 2 Isometric view of the fixity test for clip-on spacers |
| 11 | Table 2 Point test load for spacers and chairs 11 Marking |
| 12 | 12 Inspection and testing 12.1 Initial product type testing 12.2 Product inspection during manufacture 12.3 Product testing during manufacture 12.4 Inspection and test records |
| 13 | (normative) Load testing A.1 Load testing spacers A.1.1 Principle A.1.2 Apparatus A.1.3 Procedure |
| 14 | Figure A.1 Apparatus for load testing spacers Figure A.2 Position of a wheel spacer for load testing |
| 15 | A.2 Point load testing chairs A.2.1 Principle A.2.2 Apparatus A.2.3 Procedure Figure A.3 Apparatus for point load testing chairs |
