PJH said: (quoted from post at 02:45:47 03/29/10) Daman - the formula is still the same, only you must convert the inches to feet. 6 inches equals .5 feet for instance.
Formula:
feet X feet X inches divided by 12 equals cubic feet
cubic feet divided by 27 equals cubic yards
Remember - for using form calculations to order concrete - order extra.
Some of it sticks to the drum - measurements may be short - labor costs by the hour - concrete is easier to finish if it's all the same "age".
If the driver leaves with a little in the truck, you've figgered well. If he runs out - you screwed up.
It's pretty hard and very risky to figure it exact.
very handy thanks!!, I'm pretty much going to be doing a square pour(16X30) so it should come out close.
brings up another question,pouring this slab i na pole shed i put up last fall the heaviest thing going in there will be my 4500 TLB thats weighs around 10,000 lbs or so would 5" concrete be good enough or should i go 6" ???
This post was edited by daman at 05:23:54 03/29/10 5 times.
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