8/10/2019 BS 8666 -Shape Codes

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8/10/2019 BS 8666 -Shape Codes

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8/10/2019 BS 8666 -Shape Codes

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Shape Codes to BS8666: 2005

Off-set

dimension

Anglele

ngth

Dimensioning of cranked bars

4d min.

X

d

r

r

Example of bar with more than one bend

The tolerances for cutting and/or bendingdimensions shall be in accordance with Table 5 andshall be taken into account when completing the

schedule. The end anchorage or the dimension inparentheses in the shape codes on pages 16 and 17shall be used to allow for any permissible deviationsresulting from cutting and bending.

Tolerances on cutting and bending

dimensions

Radius of bending

Reinforcement to be formed to a radius exceeding

that specified in Table 6 shall be supplied straight.

6mm

8mm

10mm

12mm

16mm

20mm

25mm

32mm

40mm

Bar Size Radius

2.5m

2.75m

3.5m

4.25m

7.5m

14.0m

30.0m

43.0m

58.0m

NOTE 1 The required curvature may be obtained during placing.NOTE 2 For shapes with straight and curved lengths (e.g. shape code 12,13, 22 and 33) the largest practical radius for the production of a continuouscurve is 200 mm, and for larger radii the curve may be produced by a seriesof short straight sections.

Maximum limit for which a preformed radius is required

(B)

d

5d

Pr

8 www.kierbeck.com

Cutting of straight lengths

(including reinforcement for

subsequent bending)

Bending< 1000mm

> 1000mm to < 2000mm

> 2000mm

Length of bars in fabric

Cutting and bending processes Tolerance (mm)

+25, -25

+5, -5

+5, -10

+5, -25

25 or 0.5% of thelength(whichever isgreater)

Tolerances

TABLE 5

TABLE 6

Normal

Bar Size

d

Minimum

Radius for

Scheduling

r

Minimum

Diameter

of Bending

Former

Minimum end projection p

General(min 5d

straight)

Linkswhere

bend