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Re: SLAB - Control Joints in Concrete Slab on Grade

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We spec fibermesh for 2" topping slabs with good results, however, we always
spec #4 @ 24 " o.c.  or #3 @ 18" o.c. for slabs on grade (Provided more
stringent requirements are not reccommended by the soils engineer).  Although
#3 are our preference for 4" slabs, we have actually seen concrete installers
remove the spacers because the 18" spacing is too tight and causes them to
trip!!