[greenstone]

hust landed a large job, one part of which is to buld a 40' long wall capped with bluestone. the client wants the same brick used as is on the house. the problem is i'm not sure whether i need to dig down below frost line or if i can just excavate a foot or so, drop in 6" of drainage stone, then pour a reinforced 6" grade beam. the wall will be retaining about 16" of bluestone patio on the inside and will be 32" visible on the downslope. its quite a steep slope and really do not want to have to excavate 4' down. thanks for any help.