Block Foundation ("short pile"?)

[whydoikeepasking]

Quick question on a foundation alternative:
I'm trying to size a foundation for a structure that typically needs 20'~25' deep pile (portal frames). Due to certain site restrictions, I can only go 7' deep below. Geotech is recommending a "block foundation". Is this more or less of a "pad" foundation or still somewhat of a pile?. I was even looking into "short piles" with caps, but that just seemed odd. Any advice will be greatly appreciated as always.

 

[thaidavid40]

Was the geotech possibly referring to a combined footing, or maybe to a pair of footings connected by a strap? Otherwise, he might have been referring to a mat foundation. Hard to say without knowing the number and spacings of the footings you are talking about. Knowing that would narrow down the list of feasible, practical possibilities.
Dave

Thaidavid