Use of this stress requires that the concrete be confined by means of links etc. In areas where the cover is small, the designer may wish to use a modified version of Eqn 50 in BS 8110(2).

296 x 103

Therefore area of bar required = - = 4485 mm2

For a T20 bar, length required is 225 mm.

Use T20 cross bar 240 mm long welded to T16 ties Anchorage of main bars into support



Eqn 5.4

Eqn 5.3

Bond conditions may be considered good as the T16 bars will be anchored into a substantial support (column or wall).

3 N/mm2

Now s.req


s,prov a

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