New Jersey Administrative Code › Title 19 - OTHER AGENCIES › NEW JERSEY MEADOWLANDS COMMISSION › Chapter 6 - BUILDING CODE › Subchapter 2 - FOUNDATIONS › Section 19:6-2.24 - Allowable soil bearing pressures

Current through Register Vol. 56, No. 14, July 15, 2024
(a) The
				  allowable soil bearing pressures on satisfactory bearing materials shall be
				  those established in table 613.7. The allowable bearing pressures on nominally
				  unsatisfactory bearing materials shall be those established in accordance with
				  section 25 of this subchapter. Allowable bearing pressures shall be considered
				  to be the allowable pressure at a point in the soil mass in excess of the
				  stabilized overburden pressure existing at the same point prior to construction
				  operation. The stabilized overburden pressure existing at a point shall be
				  defined as that portion of the weight of the overlying soil material that is
				  supported by granular interaction rather than pore pressure. In general, the
				  magnitude of the stabilized overburden pressure may be approximated as follows:
1. The overlying soil material shall have
				  been in place for an adequate length of time to produce a stable condition of
				  pore pressure in or below the foundation level. Where the bearing stratum
				  consists of soils of classes 5-65 through 8-65, the bearing stratum shall be
				  considered to be fully consolidated except with regard to the weight of that
				  portion of the overlying soil material that consists of added fill
				  material.
2. Where all or a portion
				  of the overlying soil consists of fill material, the weight of the fill
				  material shall not be included in the stabilized overburden pressure unless the
				  magnitude of stabilized pressure is verified by an analysis acceptable by the
				  chief engineer on the basis of laboratory or field tests on undisturbed
				  material.
3. Bearing stratum: Where
				  the bearing stratum consists of soils of classes 9-65 through 11-65, the
				  stabilized overburden pressure shall be considered as zero unless the magnitude
				  of the stabilized pressure is established by an analysis acceptable by the
				  chief engineer on the basis of laboratory or field tests on undisturbed
				  material.
4. The stabilized
				  overburden pressure shall not include the weight of any soil removed by
				  excavation and not replaced. For footings, the total stabilized overburden
				  pressure shall not exceed the weight of a one square foot column of soil
				  (considering submerged weight where the soil column is partly submerged)
				  measured from the bottom of the footing to the lowest level of the final grade
				  above the footing. For a box foundation, where the strength of the slab is
				  adequate to stabilize the underlying soil, the stabilized overburden pressure
				  shall not exceed the weight of a one square foot column of soil measured from
				  the bottom of the box to the lowest level of the adjacent grade.
5. Where the bearing stratum consists of
				  soils of classes 9-65 through 11-65, the allowable bearing pressure shall be
				  adjusted for the effects of rebound due to excavation as determined from
				  consolidation test data.
6. Where
				  the bearing stratum consists of rock of classes 1-65 through 3-65, the
				  stabilized overburden pressure shall be neglected.