If the requirement for the base of structures be 36″below finish grade. What would it be 5’below finish grade for a walkout well. The walls are retaining boardsoil. A concrete slab will be cast over rigid insulation in the well. How would the frost cover vary, if at all, for thr retaining walls.
Get accurate measurements for fine finish-carpentry work with this precision furniture-maker's tool.
Featured VideoSawStop's Portable Tablesaw is Bigger and Better Than Before
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.