Minimum Distance Between Spread Footings
Minimum Distance Between Spread Footings
(OP)
Is there a rule of thumb or code requirement for distance between spread footings. I have spread footings that are 6'x11' beneath two saddles of a horizontal vessel. I'm trying to determine how close I can place the spread footings for an additional vessel in parallel next to it. I know the load spread is 30-45 degrees down to about 1 times the footing width. So, does that mean I can place the footings so that the clear distance is about 2 times the footing widths apart?





RE: Minimum Distance Between Spread Footings
So theoretically you can place them side by side as long as they are loaded the same.
Geotechs out there! Chime in.
RE: Minimum Distance Between Spread Footings
Fact is if you have an existing footing (i.e., it's settled) this may be moot. Then again, maybe not. I'd ask the geotechnical engineer. If it's a soft-ish ground site or a site with an underlying loose sand or soft clay) you could trigger greater-than anticipated settlements - don't know.
f-d
¡papá gordo ain't no madre flaca!
RE: Minimum Distance Between Spread Footings
A clear space of one footing width for square footings and two footing widths for continuous footings should usually be safe. If the compressible soil is more than two footing widths down or sizeable settlements are expected, ask the geotechnical engineer.
RE: Minimum Distance Between Spread Footings