Shrinkage reinforcement for thick block foundations

[hamza41]

Hello,
I'd like to have a clear interpretation of the the below requirement of BS CP2012, Part 1 Cl.3.5.7, if possible with some sketchs.
Is 600 mm spacing between reinforcement layers or between bars ? what is cube reinforcement ?
Is it equivalent to shrinkage ratio 0.0018 in ACI ? I think only horizontal layers are required for shrinkage.

Thank you for your help.

 

[hokie66]

The 600 is between layers. Read further and it is maximum 300 between bars. This is for "block" machine foundations subject to dynamic loading. No relation to the ACI minimum shrinkage reinforcement.

Doesn't the "Fig. 4" which is referenced show you a picture?

 

[hamza41]

Thank you for your reply Hokie,
The "Fig4" doesen't show these reinforcement bars.

It's said in (5) that shrinkage reinforcement should be provided.

 

[hokie66]

I agree that the provisions of that standard are unclear in their intent.