gravelrash Posted March 9, 2021 Share Posted March 9, 2021 My SE has specd' A393 steel mesh for 300mm wide strip footing, does anyone know any suppliers of trenchfill mesh i.e only 0.2m wide x 4.8m long rather than cutting down full size sheets. I know other countries supply as standard to builders but can not find UK supplier Link to comment Share on other sites More sharing options...
tonyshouse Posted March 9, 2021 Share Posted March 9, 2021 Bit weird having steel in strip footings, why does he want it in there? Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 9, 2021 Share Posted March 9, 2021 What sort of wall are you putting on a 300mm wide footing, that’s very skinny Link to comment Share on other sites More sharing options...
gravelrash Posted March 9, 2021 Author Share Posted March 9, 2021 Single leaf wall single storey on strip with with insulated internal raft for inner cavity -see Kore design 5a. Strip is 300 x 200 at 650 ground depth...I thought it was a bit overkill on a narrow strip...asked if i could just use 2 long steels but he wants cross steels as well. I also need it for raft ring beam. Link to comment Share on other sites More sharing options...
TonyT Posted March 10, 2021 Share Posted March 10, 2021 It’s a full sheet job and cut down I’m afraid. it’s what most merchants will stock anyway, loose the extra if any in the foundations so that’s a bonus? Link to comment Share on other sites More sharing options...
markc Posted March 10, 2021 Share Posted March 10, 2021 Why is the footing only 200mm thick? thats barely enough to support itself and i would be installing a full a full cage to hold a 300x200 strip together. Dont scrimp on the steel or you will likely see settlement cracks in the wall. Link to comment Share on other sites More sharing options...
Declan52 Posted March 10, 2021 Share Posted March 10, 2021 You would get what you're looking for from a company like this https://www.rom.co.uk/ I used to work for them and they could make the mesh whatever size you need but your going to pay for it. Much easier to cut 8*4 sheets up plus at this length they are much easier to move around site. Link to comment Share on other sites More sharing options...
gravelrash Posted March 10, 2021 Author Share Posted March 10, 2021 markc Why would it need a full cage? I would have thought the side shear force on a narrow 3:2 footing would be very low and the SE obviously believes the ground is sufficient. I am really suprised he wants short bars its so narrow. Link to comment Share on other sites More sharing options...
Conor Posted March 10, 2021 Share Posted March 10, 2021 I had to cut some mesh up. 4" grinder with thin metal cutting disc. Just score each bar about 3/4 way through then stand on one side and bend it over. Snaps easily enough and doesn't take very long. You'll need a few discs though!! Link to comment Share on other sites More sharing options...
markc Posted March 10, 2021 Share Posted March 10, 2021 9 minutes ago, gravelrash said: markc Why would it need a full cage? I would have thought the side shear force on a narrow 3:2 footing would be very low and the SE obviously believes the ground is sufficient. I am really suprised he wants short bars its so narrow. Very rarely a footing dig is prepared perfectly before a pour, quite often there are patches of loose stuff that either wasnt removed during the dig or simply falls in before the pour, not a problem with a thick mass fill but at only 200mm thick and 300mm wide these loose pockets or root pressure could easily cause the strip to break in several places. think of casting it as a plank and then only supporting it in a couple of places - jumping on it or simply putting it down a bit rough would break its back. Not a problem if the structure above is free standing like a wooden shed etc but a broken strip footing will permit a brick or block wall to crack. Either increase the footing size or put at least the recommended steel in, peace of mind is a good investment. Link to comment Share on other sites More sharing options...
gravelrash Posted March 10, 2021 Author Share Posted March 10, 2021 Its in very firm ground, and digger bucket will no doubt make a bigger hole. .its just the fannying around with 10mm mesh sheets when realistically 2 x 10mm parallel steels with occasional cross steel would deal with any problems along the strip. Link to comment Share on other sites More sharing options...
TonyT Posted March 10, 2021 Share Posted March 10, 2021 It’s his insurance protection to over engineer to allow for poor installation methods. not everyone out there is as fastidious about the details as we are 1 Link to comment Share on other sites More sharing options...
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