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beanpad 06-10-2013 09:22 AM

concrete pad
I am getting ready to pour a slab for a dog kennel to sit on, the slab will be 11' x 21' 3 1/2" thick. The kennel is for my four dogs, and thier weight and that of the kennel is the only weight this slab will need to support. I am trying to do this as cheeply as I can. I am leveling the ground and going to put down some stone for a base, and i will be putting a drain in the middle of the pad so it can be cleaned easily. My question is do i need to use wire mesh or rebar for this project, my father-in-law insist we have to use wire mesh to keep it from craking and breaking apart

Willie T 06-10-2013 10:03 AM

Control Crack grooving or cutting and good, thorough compacting of proper sub strata will be what takes care of those concerns, not the wire mesh. And almost no one puts in enough controled crack grooves, or in the logical places and directions. Most do it as decoration. And decent sub work and/or compacting is tough to find these days.

The purpose of wire mesh is to hold random intermediate cracks tight. Period. It does not stop the concrete from cracking. And this job is only effective if the wire is properly placed in the pour... and it almost never is.

Willie T 06-10-2013 10:29 AM

I've got a sidewalk in the rear of my house that I poured somewhere around 28 years ago. I put down no sub base, but I did compact the heck out of the ground.... AND I spaced grooved (done while wet) control cracks every two feet. No wire at all.

To this day, there is not one single crack to be found (visible.... because ALL concrete has tiny hairline fractures all through it... not just on the surface.) anywhere in the walk.

beanpad 06-10-2013 10:41 AM

i personally didn't think it was necessary, the pad wont be subjected to any significant amount of weight. As a kid growing up I helped my father and my uncle pour several concrete pads that were subject to alot more weight then this pad will ever see, we didn't use rebar or wire mesh, we just packed the ground real good and put in a layer of gravel. the pads held up just fine.

Willie T 06-10-2013 10:44 AM

It's often not weight that does in a slab, but climate extremes and changes.

Willie T 06-10-2013 10:50 AM

BTW, as a favor to your dogs, PLEASE don't put a "broom-finish" on that concrete. Trowel it nice and smooth. Would YOU like to walk and sleep on sandpaper?

Besides, it's much harder to clean a 'broom-finish".

beanpad 06-10-2013 10:57 AM

we live in southeastern ohio, weather isn't too extreme

beanpad 06-10-2013 11:03 AM

the dogs will be kept in crates in a garage at night and i am also going to put up a runner so I an let them out to run and they wont be subjected to concrete all the time, eventually we are going to fence in the entire yard then i will be able to turn them all loose in the yard and the kennel will be used when we are in yard with family and/or friends

stadry 06-10-2013 06:06 PM

semi-troweled finish works best,,, our military dogs walked, jumped, ****, & slept on broom finish'd conc,,, i don't EVER recall any dog having trouble going to sleep either at lackland afb dog school OR up in the the maryland mts,,, and added + is not paying a vet to trim fido's toenails :thumbup:.

far's wire mesh, it does have purpose: 1, it adds strength while the conc's in ' tension ' ( curing/shrinking ); 2, when it cracks randomly 'cause the jabonies didn't joint the slab properly, wire mesh holds the broken pieces together :yes: ; & 3, demolition is a bit** 'cause of the wire,,, to be properly set, mesh needs to be 1/2way in the vertical axis +/- 5% [ .2" ),,, according to aci, any steel reinforcement also needs 2" conc above & below it.

11' x 27' - 1 jnt down the middle of the 11' then divide the 27' into 5 equal pieces ( 4 jnts ) - each jnt @ LEAST 1" deep,,, that'll make each part approx 5'6" x 5'5" or thereabouts ( conc likes to be square ),,, no mesh - no rebar - wet the well-compacted soil base before placing.

:thumbsup: just joint it properly & forget the mesh !!!!!!!!!!!!!

stadry 06-10-2013 07:35 PM

while my bride, nagzilla, is out of town, we'll repl some sidewalk - 1pc is 3'6" x 24' - there'll be contraction jnts cut in every 3' - no wire mesh - no rebar - no nagzilla, either :thumbup:

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