July 20Jul 20 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.
July 20Jul 20 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?
July 20Jul 20 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).
July 20Jul 20 Author 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
July 20Jul 20 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
July 30Jul 30 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.
July 31Jul 31 On 20/07/2026 at 14:30, 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). 600mm is the minimum overlap. Your BCO will fail if this is 300-400mm. They got a tape measure out and checked the one I’m on now, so beware!
July 31Jul 31 2 hours ago, Nickfromwales said: 600mm is the minimum overlap. Your BCO will fail if this is 300-400mm. They got a tape measure out and checked the one I’m on now, so beware! I don't think that is correct. 40x wire size is what is expected. I have never been asked to do 600mm. How would the 1200 x 2400 sheets ever work?
July 31Jul 31 6 hours ago, Mr Punter said: I don't think that is correct. 40x wire size is what is expected. I have never been asked to do 600mm. How would the 1200 x 2400 sheets ever work? My bad. 600mm sheets for stitching, so 300 a side. I’ll go and kneel on some pencils. Been a long week…….
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