BS 6744:2016 – TC:2020 Edition
$246.62
Tracked Changes. Stainless steel bars. Reinforcement of concrete. Requirements and test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 117 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | compares BS 6744:2016 |
| 2 | TRACKED CHANGES Text example 1 — indicates added text (in green) |
| 4 | Publishing and copyright information Publication history Amendments issued since publication |
| 5 | List of figures List of tables |
| 6 | Summary of pages |
| 7 | Introduction by Lee Brankley, CEO, CARES |
| 8 | Foreword Publishing information Supersession Information about this document |
| 9 | Use of this document Presentational conventions Contractual and legal considerations Compliance with a British Standard cannot confer immunity from legal obligations. |
| 10 | 1 Scope 2 Normative references |
| 11 | 3 Terms, definitions and symbols 3.1 Terms and definitions 3.1.1 0.2% proof strength, Rp0.2 Key |
| 12 | 3.1.2 bar 3.1.2 cold worked ribbed bar ribbed bar that has been cold worked to meet the property andgeometrical requirements of this British Standard 3.1.3 batch 3.1.4 bundle 3.1.5 cast (heat) analysis 3.1.6 characteristic value, Cv 3.1.7 characteristic yield strength, fyk 3.1.8 coil 3.1.9 cold worked ribbed stainless reinforcing steel bar 3.1.10 critical chloride threshold value 3.1.11 decoiled product |
| 13 | 3.1.3 hot rolled ribbed bar 3.1. 12 hot rolled ribbed stainless reinforcing steel bar 3.1.4 nominal diameter, d 3.1.13 length 3.1.14 longitudinal rib 3.1.15 manufacturer 3.1.16 maximum value 3.1.17 minimum value 3.1.18 nominal cross-sectional area, An 3.1.19 nominal diameter, d 3.1.53.1.20 coil product analysis 3.1.7 bundle 3.1.21 purchaser |
| 14 | 3.1.22 reinforcing steel 3.1.23 reinforcing steel designation 3.1.24 reinforcing steel grade 3.1.9 3.1.10 transverse rib 3.1.113.1. 26 rib height, aαmax 3.1.133.1.28 relative rib area, fR stress ratio, σf area of the projections of all ribs on a plane perpendicular to the longitudinal axis of the wire, or bar, or rod, divided by the wire length and the nominal circumference 3.1.1929 supplier 3.1.203.1.30 purchasertransverse rib 3.1.21 0.2 % proof strength, Rp0.2 |
| 15 | 3.1.14 3.1.15 transverse rib flank inclination, ! angle between the rib flank and the longitudinal axis of the bar (see Figure C.2) 3.1.16 cast (heat) analysis 3.1.17 product analysis 3.1.18 manufacturer 3.1.22 characteristic strength |
| 17 | 3.1.31 transverse rib flank inclination, α 3.1.32 transverse rib inclination, β Figure 2 Typical stress-strain curve (relation) for stainless reinforcing |
| 20 | 4 Designation EXAMPLE 5 Standard sizesdiameters |
| 21 | 6 Dimensions, mass and tolerances 6.1 EffectiveNominal cross-sectional area and mass per metre run |
| 22 | Table 3 — Nominal cross-sectional area of reinforcing steel and nominal mass per metre run Table 4 — Tolerances on mass per metre run |
| 23 | Table 4 — Tolerances on mass per metre run Table 4 Tolerances on mass per metre run 7 Steelmaking process 8 Chemical composition 8.1 Cast analysis |
| 24 | Table 5 — Stainless steel bar chemical composition (cast analysis) % by mass |
| 25 | 8.2 Product analysis 9 Surface quality 10 Surface geometry 10.1 General |
| 26 | Table 5 Chemical composition (cast analysis)% by mass of typical, commercially available BS EN 10088 stainless reinforcing steel designationsA) 10.2 Relative rib area |
| 27 | 10.3 Geometry of rib 10.3.1 General 10.3.2 Transverse ribs |
| 28 | 11 Conditions of supply 12 Mechanical and physical properties 12.1 Selection of test samples for conformity testing 12.2 Test reports 12.3 Test certificate |
| 29 | 12.4 Retests 12.5 Tensile properties 12.5.1 0.2% proof strength, Rp0.2 12.5.2 Tensile strength, Rm 12.5.3 Stress ratio, σf 12.5.4 Elongation at maximum force |
| 30 | 12.5.5 Percentage elongation after fracture, A5 |
| 31 | 12.1 Tensile properties Table 8 Strength and ductility properties |
| 32 | 12.2 Total elongation at maximum force, Agt 12.6 Bendability 12.7 Bonding strength (surface geometry) 12.4 12. 8 Fatigue testcharacteristics |
| 33 | 12.9 Strength at elevated temperature (tensile strength) 12.10 Chemical composition and durability 12.11 Weldability 12.512.12 Additional test requirements 12.5.112.12.1 General 12.5.212.12.2 Charpy impact test 12.5.312.12.3 Intergranular corrosion test |
| 34 | Retests 1413 Product identification 14.113.1 Product marking 14.213.2 Product labelling |
| 35 | Annex A (normative) A.1 Uniform cross-sectional area A.2 Variable cross-sectional area |
| 36 | Annex B(informative) Table B.1 — Guidance on the use of stainless steel reinforcement for different service conditions |
| 37 | C.2 Test procedure (see Figure C.1 and Figure C.2) C.2.1 Heights of transverse ribs C.2.2 Height of longitudinal ribs, a´ C.2.3 Transverse rib or indentation spacing, c C.2.4 Pitch, P C.2.5 Transverse ribless perimeter, Cfi C.2.6 Transverse rib angle, C.2.7 Transverse rib flank inclination, ! C.3 Determination of the relative rib area, fR C.3.1 General |
| 38 | C.3.2 Calculation of fR (see Figure C.3) C.3.3 Simplified formulae |
| 39 | C.3.4 Formula used for the calculation of fR Key |
| 40 | Figure C.2 — Rib flank inclination, !, and rib height, a (section A-A from Figure C.1) Figure C.3 — Determining the area of the longitudinal section of a rib |
| 41 | A.1 Principle A.2 Materials A.2.1 Ribbed stainless reinforcing steel A.2.2 Mortar A.2.3 Specimens |
| 42 | Key A .2.4 Test procedure A.2.5 Test results |
| 43 | A.2.6 Test report |
| 44 | (informative) D.1.1 Manufacturer’s inspection B.1 General D.1.2 Selection of test samples D.1.3 Condition of test samples D.1.4 Tensile test D.1.5 Test records D.1.6 Test certificate |
| 46 | B.2 Terminology B.3 Prescriptive guidance B.4 Performance guidance B.4.1 General |
| 47 | B.4.2 Performance guidance for carbonation induced corrosion. |
| 49 | B.4.3 Performance guidance for chloride-induced corrosion B.4.4 Performance guidance for chloride induced corrosion in carbonated concrete |
| 50 | Figure B.1 Example predictive model indicating where carbon steel reinforcement can be replaced by stainless steel reinforcement for a given chloride surface content, design life and reinforcement depth |
| 51 | B.5 Adaptations and limitations |
| 52 | Annex E (normative) Bend test |
| 53 | Table F.1 — Fatigue test stress ranges F.3 Test procedure F.4 Retests |
| 54 | Table G.1 — Comparison between the designation systems used in current and former British Standards and American steel specifications |
| 56 | Annex I (informative) Third party certification I.1 Material covered by a third party product certification schemeI I.1.2.1 Extent of testing I.1.2.2 Evaluation |
| 57 | Annex D Table D.1 Comparative thermal coefficient of expansion data |
| 58 | Figure E.1 Idealized design curve from BS EN 1992-1-1:2004+A1:2014 Table E.1 Young’s modulus for stainless reinforcing steel |
| 59 | Figure E.2 The constitutive law of stainless reinforcing steel E.2 Steps for using the full properties of higher strength and ductility of stainless reinforcing steel |
| 60 | Figure E.3 Example of design model for stainless reinforcing steel |
| 61 | F.2 Duplex stainless reinforcing steel F.3 Welding stainless reinforcing steels to carbon steels F.4 Handling and processing |
| 62 | (normative) For N values for performance retention at elevated temperatures the relevant designation shall be selected from BS EN 1993-1-2:2005, Table C.1. |
| 63 | H.1.2.1 Extent of testing H.1.2.2 Evaluation |
| 64 | Table H.1 Acceptability number of test results, n, for a reliable failure rate of 5% (pass = 0.95) at a probability of 90% (1 – α = 0.90) |
| 66 | I.2.2H.2.2 Extent of sampling and testing I.2.3H.2.3 Properties to be tested |
| 67 | c) Chemical composition according to product analysis: d) Fatigue properties: I.2.4H.2.4 Evaluation of results |
| 68 | I .2.4.2H.2.4.2 Inspection by attributes H.3 Corrosion testing |
| 69 | Annex JI (informative) Table J.1 — Comparative thermal coefficient of expansion data |
| 70 | Bibliography Standards publications Other publications |
