BS 8666 is intended for suppliers and purchasers of fabricated ribbed reinforcing steel (bars and fabrics) for the reinforcement of concrete. The standard includes requirements for the cutting and bending of reinforcing bars and coils. It also specifies the requirements for scheduling fabricated reinforcing steels, including a standard notation for different reinforcing steel types, standard bent shapes, and standard designations of welded fabric. Standard forms of bar and fabric schedules are given.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | BRITISH STANDARD <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | Committees responsible for this British Standard <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions bar nominal size nominal diameter bar mark fabric mark shape code pitch mesh <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | fabric standard fabric purpose made fabric fabric reference bar schedule fabric schedule link 4 Notation Notation of steel reinforcement <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 5 Form of schedule 5.1 General 5.2 Paper-based schedules <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 5.3 Electronic data files 6 Form of bar or fabric label <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Form of bar schedule <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Form of fabric schedule <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Purpose made fabric example <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 7 Dimensions 7.1 The dimensions given on the schedule shall be measured as shown in Table 3. For deformed reinforcement, the outside surface shall be the extremities of the ribs. The total length dimension specified on the schedule for each bar or for bars in each s 7.2 The bending dimensions of reinforcement shall be in accordance with Table 2. 7.3 The dimensions for the scheduling of reinforcement bounded by two concrete faces shall allow for the permissible deviations. 7.4 The dimensions for the scheduling of reinforcement requiring special end preparation shall take into account the system to be used. 7.5 To facilitate transportation, each bent bar shall be contained within a rectangular area, the shorter side of which should not be longer than 2 750 mm. 7.6 The value for minimum end projection P, as specified in Table 2, shall apply to all shape codes. 8 Scheduling 8.1 Each bar or sheet of fabric shall be scheduled completely and without reference to earlier schedules. Such descriptions as \u201csee schedule 12\u201d or \u201cas above\u201d shall not be used. 8.2 Shape codes shall be in accordance with Table 3. Standard fabrics shall be in accordance with Table 4. 8.3 For shape codes 11 to 98, if the free variable dimension (the dimension shown in parentheses in Table 3) does not conform to the requirements specified, then the shape shall be drawn and given the shape code 99. 8.4 No dimension specified in Table 3 shall be given a zero value, as this changes the basic shape. 8.5 Shapes with shape code 99 shall be drawn on the schedule over columns A to E using two parallel lines to indicate the reinfo…Table 3. The total length shall be given, and one bending dimension shall be indicated in parentheses as the free dimensio <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 8.6 If the angle between two portions of the shape meeting at a bend is not a right angle, it shall be defined by co-ordinates and not by degrees of arc or radians. 8.7 When dimensioning an acute angle the tangential lines shown in Figure 4 shall be used. Dimensioning of an acute angle 8.8 Apart from shape code 98, bars bent in two planes shall be sketched isometrically or shown in two elevations, using first angle projection. The words \u201cbent in two planes\u201d or \u201cisometric sketch\u201d shall appear on the schedule adjacent to the sketch. 8.9 The overall offset dimension of a crank shall be not less than twice the size of the bar. The angled length (see Figure 5) shall be not less than: Dimensioning of cranked bars <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 8.10 For all shapes with two or more bends in the same or opposite directions (whether in the same plane or not), the overall dimension given on the schedule shall always include a minimum straight of 4d between the curved portion of the bends, as shown Example of bar with more than one bend <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Minimum scheduling radii, former diameters and bend allowances <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Standard shapes, their method of measurement and calculation of length <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Standard fabric types and stock sheet size <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 9 Tolerances on cutting and bending dimensions Tolerances 10 Radius of bending Maximum limit for which a preformed radius is required <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 11 Bending of fabric reinforcement Bending instruction sketches Position of welded transverse bars <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 12 Fabrication and routine inspection 12.1 Fabrication 12.2 Routine inspection of product <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Frequency of inspection 12.3 Processed coil product – Evaluation of conformity <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | (informative) Third party certification and batch testing (informative) Third party certification and batch testing Fabricated material covered by a third party product certification scheme Consistency of production Determination of the long-term quality level Batch testing General Extent of sampling and inspection\/testing Inspection by attributes <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Evaluation of results Inspection report <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Scheduling, dimensioning, bending and cutting of steel reinforcement for concrete. Specification<\/b><\/p>\n |