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Aspect Ratio for concrete slab on grade for Drainage Channel

Aspect Ratio for concrete slab on grade for Drainage Channel

Aspect Ratio for concrete slab on grade for Drainage Channel

(OP)
I need some information on the Aspect Ratio, ie width of channel and spacing of contraction joint(for concrete slab on grade).  I was suggested by a public agency that I should have 2:1 aspect ratio.  For 25'-0" wide channel, I shall place cotraction joints at 50'-0" on center and expansion joint at 150'-0" oc.  Could anyone out there lead me to a source where I can find some info. on Aspect Ratio ? Thanks.

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