Concrete Control-Joint Saw-Cut Footage
Saw-cut linear feet for the control-joint grid a slab implies: panels each way = ceil(dimension / spacing); joint footage = (panels_L - 1) x width + (panels_W - 1) x length. A 60 x 40 ft slab on a 12 ft grid is a 5 x 4 panel layout and 340 LF of saw cut; a tighter 10 ft grid gives 380 LF. The cut is made early (a soft cut within hours or a conventional cut before shrinkage cracks) to about a quarter of the slab depth. Takes control-joint-spacing to the blade footage.
Formula and source
panels_l = ceil(length_ft / spacing_ft); panels_w = ceil(width_ft / spacing_ft); joint_lf = (panels_l - 1) x width_ft + (panels_w - 1) x length_ft.
Control-joint saw-cut-footage identity by name (panel grid by ceiling, interior joint length); first-principles grid arithmetic.
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