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Posted: Wed Jul 06, 2011 7:41 pm
by simonslab
I am building a workshed - concrte base,blockwork up to windowbase level,timber top and metal sheet sloping roof.I would like to know what depth of concrete(fibre re-enforced) is required? The slab is 5m x 3m.Any tips will be appreciated. 
Posted: Wed Jul 06, 2011 9:10 pm
by dig dug dan
100mm will be plenty. unless you are planning on parking a chieftain tank inside, in which case go for 150mm
at 100mm, you need 1.5cum of readymix
Posted: Wed Jul 06, 2011 9:27 pm
by Pablo
Are you using steel or glass fibres if it's glass i'd think about an 8mm steel reinforcing mesh just to guarantee no cracks.
Posted: Thu Jul 07, 2011 6:47 am
by seanandruby
sounds like a bit of eeight going on the slab. You really need a proper foundation for brick/blockwork, so a thickening would be best under walls.
Posted: Thu Jul 07, 2011 12:45 pm
by simonslab
Pablo wrote:Are you using steel or glass fibres if it's glass i'd think about an 8mm steel reinforcing mesh just to guarantee no cracks.
Glass fibres-reported to be stronger overal.I am still unsure what depth of concrete is needed though.I do'nt want to get it wrong,that would be a disaster.
Posted: Thu Jul 07, 2011 5:46 pm
by jonnyboyentire
If you are worried then overengineer it - deeper than necessary base.