Reinforcing Mesh

[Tarw Coch]

Looking to learn a bit about reinforcing mesh as I have some concrete to lay. Anything I've seem is approx 6mm and approx 300mm squares is this standard stuff? How much does it cost and how is it priced, per sheet, square meter and how big are the sheets?

Any advice gratefully received.

 

[Kevtherev]

Christmas steel stockholders in Shrewsbury are your best bet tarw.
You can also have glass fibres in concrete as well.

 

[suffolksmallholder]

They are usually 10' x 5' from your local merchant. There are different sizes of wire/grid too. It all depends on what you intend doing. There's no harm in asking the supplier either but what you can get locally is ok unless you are getting into structural formation. http://www.rebar.co.uk/mesh/ Look for 'chairs' to support the mesh. ( look under concrete support/chair)
http://www.concreteconstruction.net/concrete/placing-reinforcing-steel.aspx. Something to consider! I divide the thickness into thirds depending on the requirement. For floors the reo is in the top third and for a lid it is in the bottom third. (septic/rainwater tank)
I covered parts of concrete forming at college but this has come a long way in 30 years!
SS

 

[Tarw Coch]

See quite a bit coming this way on Dyfed Steels lorry too so I would give them both a try for price just trying to find a bit out first so I'm not too green when I ring up.

Christmas steel stockholders in Shrewsbury are your best bet tarw.
You can also have glass fibres in concrete as well.

 

[Tarw Coch]

They are usually 10' x 5' from your local merchant. There are different sizes of wire/grid too. It all depends on what you intend doing. There's no harm in asking the supplier either but what you can get locally is ok unless you are getting into structural formation. http://www.rebar.co.uk/mesh/ Look for 'chairs' to support the mesh. ( look under concrete support/chair)
http://www.concreteconstruction.net/concrete/placing-reinforcing-steel.aspx. Something to consider! I divide the thickness into thirds depending on the requirement. For floors the reo is in the top third and for a lid it is in the bottom third. (septic/rainwater tank)
I covered parts of concrete forming at college but this has come a long way in 30 years!
SS

I always though it was set up on something to hold it off the ground but last year saw some builders pour out the concrete then drop the mesh on top and tread it in, seemed a lot easier.

 

[suffolksmallholder]

Larfarge will certainly help with the different types of concrete needed. Don't be shy in asking! I had a long and interesting conversation with my local ex-Lafarge depot recently and ended up with a very good deal for some loads. (one of my apprentices studied 'concrete technology' at uni) Perhaps I'm lucky with our local depot, but they are in the business to help those who are in need we're not all 'specialists' and I'm the first to admit this now!
SS

 

[Blue.]

I generally use a252 8'x16' sheets cost about £28-£30 I think they are 8mm

 

[suffolksmallholder]

I always though it was set up on something to hold it off the ground but last year saw some builders pour out the concrete then drop the mesh on top and tread it in, seemed a lot easier.

Mmmm. For an ordinary oversite pour this is usually ok. There's enough thickness in the total to cover any future movement. When you are on a price and trying to form something with a little more structural integrity, attention to detail is important. Moving where your reo is placed can alter the load bearing capabilities by considerably..... like 20%! (see the link). At £100+ per cubic meter it is worth using concrete as a brilliant structural medium, rather than just sloshing it in a hole, in a big lump!
SS

 

[Kevtherev]

@PDRD

 

[Derky]

Generally we use A 252 on farming and industrial projects 8 mm wire, then you have 193 which is 7mm wire and then 142 which is 6 mm tend to use this on domestic projects.
Remember reinforcing is there for anticracking too just thrown in is not sufficient. Needs placing on chairs and if 2 layers are required it needs chairs in between and good tieing otherwise when you pour it you will flatten it. It should be sufficiently tied that you can walk on it without it collapsing. Plus you should put it longest bars underneath.

 

[Digester Man]

You get little precast blocks which break easily and can be placed all over the ground and then place the mesh on top, keeps mesh about 30-40mm off the ground. Broken pin kerbs also do the same job

Then buy the wire spacers which go between the two sheets of mesh keeps them about 100mm apart

All of our silos and slurry stores have been A393 mesh. Think it's about £70 per sheet