Shallow Grade Beams and Frost
Shallow Grade Beams and Frost
(OP)
I am working on a few designs in Alberta that include shallow grade beams (12" steel beam 2" above grade, 10" preserved wood beam 2" below grade, 12" concrete). With the close pile spacing and and void forms, I'm not to concerned about the grade beams and structures themselves.
It is the frost penetration extending under the shop's slab-on-grade and causing heaving that I'm curious about.
Is this an issue?
Or does the clean fill under the slab, building heat and adequate site drainage prevent heaving sufficiently?
Regards,
Wadavis
It is the frost penetration extending under the shop's slab-on-grade and causing heaving that I'm curious about.
Is this an issue?
Or does the clean fill under the slab, building heat and adequate site drainage prevent heaving sufficiently?
Regards,
Wadavis





RE: Shallow Grade Beams and Frost
RE: Shallow Grade Beams and Frost
Thus, it goes deep (and horizontal) in low moisture soils, as sands. But does not go so far in clays that have high moisture content. Luckily sands are low frost potential for heaving.
Thus, a shallow depth insulation zone may not do much for you, since it follows the easiest path, so to speak.
RE: Shallow Grade Beams and Frost
Will be using an insulated dog leg to get the most insulation out of the least excavation.