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Posted by Italian on August 12, 2006, 10:12 am
First of all I would give the contractor that included the rebar extra
consideration. Yes wire is adequate and meets code but if after you
have removed as much concrete as we have in a lifetime you realize that
wire is slightly better than fiber which is completely useless.
You mentioned sealed what are you refering to? A standard finish slab
(not stamped) would not require a sealant..
Also with todays redi mixes I will gaurantee you will get cracks a savy
contractor will know this and place the joints at a proper depth and
orientation to controll these cracks...but unfortinutally even with the
best effort it still cracks where its not supposed to.
4" should be just fine for where you are we allways make the perimiter
a little thicker usually about 3" just for insurance.
Neither bid
> mentions much about excavation and sub-grade prep, though it was
> discussed verbally with both contractors.
Um......this being MORE important than anything else in the job I would
get specific clarification on this. The majority of time (labor cost)
is eaten up in this step, forming and pouring is the easy part. The
condition of the existing drive way must be examined befor proceeding.
Being that it is gravel and has been in use for several years is a plus
you have been essentially compacting it for several years now. On the
other hand areas that collect water must be looked at and fixed. One
final note about rebar VS wire mesh..simple test take a piece of rebar
1 foot long and a piece of wire mesh 1 foot long and see which one you
can bend...
allan230@mailinator.com wrote:
> Have obtained 2 bids for an approx 3400 sq ft driveway
>
> Both bids specify 4" of 4000# concrete, finished and sealed, with sawed
> control joints. One bid specifies 6x6 6 ga. wire reinforcement, the
> other specifies 3/8" rebar 3' on center. Would one be preferable to
> the other? Is 4" enough thickness, for a residential driveway? I'm in
> Indiana, so winters almost always have a couple of periods where the
> lows are below zero.
>
> Existing driveway is gravel, depth unknown, about 5-6 years old.
> Getting pretty weedy.
>
> The bids vary a lot, one being $4.60/sq ft the other about $3.10.
>
> Anything else to consider, or ask for clarification on? Neither bid
> mentions much about excavation and sub-grade prep, though it was
> discussed verbally with both contractors.
>
> Allan
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