Content written by Mick the Builder

Footing systems

Footing systems

Acceptable Methods Of Stepping Strip Footings

Stepping of footing.  The base of a strip footing shall be horizontal ladder slope of not more than 1in 10 fall, the footing shall be stepped in accordance with one of the methods given below

(a) trench mesh reinforcement may be replaced by the equivalent reinforcing bars

(b) design cover to the reinforcement shall be 40 mm

(d) the lapped length of bar splices shall be not less than 500 mm.  At T and L. intersections, bar shall be continued across the full width of the intersection.  At L. intersections, one the outer bars shall be bent and continued for 500 mm.

( e) service penetration  shall be permitted through the middle third of the footing.  The affect of other footing penetrations  shall be taking into account by the provision of extra depth or reinforcement

(Concrete, shall they not less than  N20mpa  with 20 mm nominal maximum aggregate size.  Slump shall be selected to suit the construction conditions.


( c) trench mesh in footings shall be overlapped by that width of the fabric at t, and L. intersections and a splices shall be lapped by 500 mm