Cement Volume Estimation 3

[Mark Suplee]

I am trying to put together a budgetary estimation for a project. As part of this estimation I need to come up with a volume of cement necessary for the foundations for a series of pumps and tanks. I have no idea where to start on this. I am assuming stable sub-grade, zero seismic activity and 150mph winds.

 

[r13]

For pump footing, I'll estimate 4 times pump weight with a foot print of 12" beyond legs in each direction. For tank, use frost depth plus 1' for thickness height, and 12"-18" thick ring wall, or solid concrete infill (very conservative).

 

[JAE]

You mean "concrete" correct? Not "cement". Portland cement is only an ingredient of concrete.

 

[STrctPono]

Yes, please... Concrete not cement.

How tall are these tanks? How wide at the base? If short, then Retired13 has some good advice. But if tall with a small footprint, I would want to be sure you don't need a larger foundation. After all Georgia, with 150mph winds is pretty significant.

 

[Mark Suplee]

CONCRETE

20' diameter,
24' tall
Houston, TX

 

[r13]

Mark,

Depends on the soil strength and settlement characteristics, the tank may not require foundation. But for estimate purpose, be conservative (suggest ring wall), so the foundation designer wouldn't curse on your short sight

For pump, Vol[sub]conc[/sub] = 4*W[sub]pump[/sub]/145, volume in ft[sup]3[/sup], pump weight in lbs.

 

[STrctPono]

Well with those dimensions, you don't have any issues with wind related to the foundation. I suggest you follow retired13's advice and assume at least a ring wall foundation.