Overlapping rebar mesh sheets

[flanagaj]

I purchased 4.8m x 2.4m A242 mesh sheets without flying ends.  the way the sheets have to be laid means that there are some areas with 3 sheets overlapping. We are having a 150mm slab and the chairs raise the mesh 40mm off the bottom.  I don't suspect that it is an issue, but just wanted to check as I don't want BC failing the inspection on Thursday and then having a mad panic to try and come up with a solution to fix the problem. 

[Redbeard]

If by 

7 minutes ago, flanagaj said:

'without flying ends'

you mean the sheets have a rebar strip all round the perimeter why not just cut that off where 2 or more will overlap? If I have misunderstood your Q then I am sorry not to give you an answer!

 

This and other Qs suggest that good progress is ... progressing. You must be v pleased to be coming out of the ground now. Got any pics?

[Mr Punter]

If there is only 1 layer you will be fine with the overlaps.  If you can get someone to help placement it would help a lot as the sheets are heavy and awkward.  You may want some tie wire where the sheets join and allow for a 300-400mm overlap (40x wire size).

[flanagaj]

3 hours ago, Mr Punter said:

If there is only 1 layer you will be fine with the overlaps.  If you can get someone to help placement it would help a lot as the sheets are heavy and awkward.  You may want some tie wire where the sheets join and allow for a 300-400mm overlap (40x wire size).

I don't think I can start cutting sections out, as then it won't be connected to the other sheets.   I might ask building control to comment

 

[Conor]

Key thing is the steel to concrete ratio along with spacing between the mesh. See if you can use this to do a quick check. https://wutools.com/calc/engineering/rebar-calculator

 

[LSB]

What is going on top of the pour, we had 3 at some points like you, but our pour is 200 with insulation and screed on top.

So, if the concrete is a bit thin at points then it will be well covered.