We are importing type SW-SM material for a building pad. The specification clearly states SW and SM material is satisfactory. Fills for the building pad are from 0' to greater than 20'. Maximum rock size for fill in the specification is 3".
The site plans indicate to use ML or CL material for...
South Central PA is laden with pinnacled limestone and sinkholes which many times require the use of drilled caissons. The caissons typically have bottom sockets drilled into rock from 36" to 72" in diameter. The rock bearing area must encompass 100% of the cross-sectional area of the caisson...
