Monolithic Slab questions
Monolithic Slab questions
(OP)
For a steel truss building, 24' x 36' - normal garage/shop application. Specs are 4" slab, combined with 12" x 12" footing around perimeter, fiber fill 3000psi concrete, rebar in footing, anchor "J" bolts set in place, located in Georgia (minimum freeze potential).
QUESTIONS:
Does the slab need either inserts or saw cuts for crack paths, or is it best left intact?
Should it be poured on tamped clay/sand or a gravel base?
Polyethylene underlay to prevent ground moisture from getting to slab - good or bad idea?
Any other words of wisdom on this project?
Thanks guys!
QUESTIONS:
Does the slab need either inserts or saw cuts for crack paths, or is it best left intact?
Should it be poured on tamped clay/sand or a gravel base?
Polyethylene underlay to prevent ground moisture from getting to slab - good or bad idea?
Any other words of wisdom on this project?
Thanks guys!





RE: Monolithic Slab questions
In general, I also say, in my practice that does not include fiber reinforced concrete, I would make the slab 15 cm thick, doubly reinforced, and any edge beam on the ground no less than 40x40 cm.
RE: Monolithic Slab questions
Concrete should be placed on compacted fill, preferably sand. Polyethylene sheeting not necessary, but may be required by local code. Leave it out if you can.
RE: Monolithic Slab questions
I'll ask contractor to increase edge beam size. Your dimensions will let the surface of slab be higher above finished grade as well.
Most contractors prefer the fiber, since it eliminates the problem of wire mesh sagging down or not staying in center of section.
Any tips on best cure/seal material to use?