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it's 4 sided I just forgot to put the 2 in he equation. In addition I will be adding a Smart Rock Sensor(https://www.giatecscientific.com/products/concrete-sensors/smartrock-maturity-meter/) to the concrete that will give me the PSI rating.

I tried another MFG and they can not meet the deadline. So that puts me here. I have the inside portion of the form completed and once i determine the product I am using I can get the depth of concrete and do the outside. Is the Non Shrink High performance a bad idea?

my calculations where as follows: 4x6x.33x2 + 4x4x.33 = 26.37. So essentially 1 yard. Than the grout covers.45 Cubic Feet per bag and I am adding 25#'s of 3/8 minus Pea rock per bag and I figured the 25 pounds pea rock would cover.25 cubic feet. So I took 27 divided by .7 and came up with 38.57...

There is no bottom and the top is a separate piece.

I need to stay under 3000# because shipping and handling and I could go up to 4" thick and still be under 3000#. So with that being said and understood. What would you use for a concrete mix? I would prefer to use Pre-made mix for quality control reasons.

I guess I don't know I am just using a product that has the same strength as the vaults I usually get. Although they use a Polymer based concrete.

To cut down the weight for transportation and handling. Instead of the sidewall having to be 4 1/2 thick I can go down to 2 1/2 thick.

We have typically use Hubble/Quazite polymer vaults and previous to that I used a company call Tunnel Mill. The lead time on the Quazite vaults have gone from a 3-6 week lead time to a 36 week lead time and doubled in price in the last 18 months and Tunnel Mill went out of business. I was...

I am going to use Quickcrete's Cement based Non Shrink Precision Grout for a Pre-Cast Communications Vault and Lid I am making. The vault is 4x6x4. 3" thick Side Walls. I am adding 25#'s of 3/8" Pea Rock to each 60#pound bag of Grout per the instructions to keep its High Strength Properties. The...