N.J. Admin. Code § 19:6-2.41

Current through Register Vol. 56, No. 11, June 3, 2024

Section 19:6-2.41 - Where more than one pile type, pile capacity or method of pile installation is used

(a) Wherever it is proposed to construct a foundation for a building utilizing piles of more than one type or capacity, modifying an existing foundation by the addition of piles of a type or capacity other than those of the existing piling, construct or modify a foundation utilizing different methods or more than one method of installation, or using different types or capacities of equipment (such as different types of hammers having markedly different stricking energies or speeds), or support part of a building on piles and part on footings, the several parts of the building supported on the different types, capacities, or modes of pilings shall be separated by suitable joints providing for differential movement, or a report shall be submitted by an engineer qualified in soil mechanics, establishing to the satisfaction of the chief engineer that the proposed construction is adequate and safe, and showing that the probable settlements and differential settlements to be expected will not result in instability of the building or stresses in the structures in excess of the allowable values established in this subchapter. The provisions of section 42 of this subchapter relating to required load test shall apply separately and distinctly to each different type or capacity of piling method of installation, or type or capacity or equipment used, except where analysis of the probable, comparative behavior of the different types or capacities of the piles or the methods of installation indicates that data on one type of capacity of pile permits a reliable extrapolation of the probable behavior of the piles of other types and capacities.

TABLE BA-615.11

ALLOWABLE COMPRESSIVE STRENGTH FOR PILE MATERIALS

PILE MATERIAL	ALLOWABLE COMPRESSIVE STRESS
Concrete	Concrete 0.25f'c
	Reinforcing steel--0.40 fy but not greater than
	30,000 psi.
Timber	See Timber piles 618.1
Steel	H piles--0.35 fy, with fy not to be taken as greater
	than 36,000 psi.
	Minimum thickness of metal shall be 0.40. inches.
	Pipe Piles, shells for cast-in-place concrete piles
	and shells of pipe sections used in casisson
	piles--0.35 fy (fy not to be taken as greater than
	36,000 psi) for thickness of 1/8 inch or more. Metal
	thinner than 1/8 inch shall not be considered as
	contributing to the structural strength of the pile
	section.

Note:

f'c = 28-day compressive strength of concrete.

fy = Minimum specified yield strength of steel.

N.J. Admin. Code § 19:6-2.41