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Mat Foundation for ATM Machine

Mat Foundation for ATM Machine

Mat Foundation for ATM Machine

(OP)
I have been tasked with designing a foundation for an ATM machine. Where the ATM is located at, I have 1500 psf max allowable soil bearing at 2 ft below grade. I plan on making the foundation at least 2 ft thick from grade. I am basing the design of my foundation off of a Dash 2000 ATM pad with canopy. How much the mat should extend above grade? I was thinking of just calling out 6 inches above grade. Do I need to determine the base flood elevation or is there something else I have not considered? All suggestions/comments are appreciated.

RE: Mat Foundation for ATM Machine

I am not sure what your canopy-atm arrangement looks like but a 2' thick mat sounds like way over kill. The ATM can probably sit on a 4" thick pad and if you are in a frost region, the canopy can probably sit on small pad footings or grade wall. That said, if you do provide a 2' thick mat you have addressed the potential flood issue, as concrete is denser than water and will not float.

RE: Mat Foundation for ATM Machine

Are there any security concerns that would affect the anchorage of the ATM to the foundation? Say, having anchor bolts embedded deep enough to minimize the chance of someone connecting a powerful truck to the ATM and pulling it off the foundation then dragging it away in the middle of the night. Have heard of this sort of crime happening.

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RE: Mat Foundation for ATM Machine

Oengineer -

Is this a drive up ATM or a walk up ATM?

For both cases, the ATM machine manufacturer might specify a desired machine height above grade.

For example, on a walk up machine, maybe they want the buttons 36" above the floor/grade so that someone in a wheelchair can use.

If it is a drive up ATM then maybe there is a magic number where the majority of cars can access? I know a US Mailbox is 41" to 45" above the road surface.

If available, I would see if the proposed machine has any specs, and then work backwards.

RE: Mat Foundation for ATM Machine

I agree with Joel. Look into the requirements of the ATM manufacturer and/or bank so that the machine is compliant with accessibility requirements. Even if it's a drive-up ATM, people would still walk up to it and it might need to be ADA compliant. You could use a turn down slab/foundation if you have frost depths you must meet and still keep the slab itself rather shallow.

RE: Mat Foundation for ATM Machine

(OP)
I spoke with a manufacture that I based my design on (the attached sketches). He said 6 inches above grade for the bottom of the ATM is good.

RE: Mat Foundation for ATM Machine

(OP)
Would anyone happen to know what is a typical light pole vendor to be used for drive-thru ATM Cul de Sac? I am looking to design a light pole foundation as well.

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