Technical Manual

Inc.

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APPENDIX 3D

MODEL SPECIFICATION – HYDRAULICALLY-DRIVEN PUSH PIER SYSTEMS

Chapter 3

Hydraulically-Driven Push Piers

B, Type E & S with a minimum yield strength of 35 ksi and a minimum tensile strength of

60 ksi. The pier tube shaft coupling finish is plain steel.

5.3.3 External Sleeve: The central steel shaft of the external sleeve is 3.500-inch outer diameter

by 0.216-inch wall thickness hollow structural section in conformance with ASTM A500

Grade B or C with a minimum yield strength of 50 ksi and a minimum tensile strength of

62 ksi. A 0.75-inch long collar, welded to one end, is manufactured with 4.000-inch by

0.226 wall thickness hollow structural section conforming to ASTM A53 Grade B, Type

E & S with a minimum yield strength of 35 ksi and a minimum tensile strength of 60 ksi

or the end of the external sleeve is trumpeted without a collar. The external sleeve shaft

finish is either plain steel or hot-dip galvanized in accordance with ASTM A123.

5.3.4 Brackets: Retrofit brackets FS288B, FS288BL, FS288BV and FS288BFM are suitable for

use with the PP288 push pier system. Bracket finishes are either plain steel or hot-dip

galvanized in accordance with ASTM A123. Bracket hardware finishes are zinc coated

in accordance with ASTM B633.

5.4 Model PP350 Push Pier System

5.4.1 Starter and Pier Tube Sections: The central steel shaft of the starter and pier tube sections

are 3.50-inch outer diameter by 0.165-inch nominal wall thickness hollow structural

section in conformance with ASTM A500 Grade C with a minimum yield strength of 50

ksi and a minimum tensile strength of 55 ksi. The starter tube includes a 1.00-inch long

factory-welded friction reduction collar manufactured from 4.00-inch outer diameter by

0.226-inch nominal wall thickness hollow structural section conforming to ASTM A53

Grade B, Type E & S with a minimum yield strength of 35 ksi and a minimum tensile

strength of 60 ksi. The starter tube and pier tube shaft finishes are triple coated in-line

galvanized and the friction reduction collar shaft finish is plain steel.

5.4.2 Shaft Coupling Material: The pier tube shaft coupling material is factory crimped or plug-

welded to one end of the pier tube section and consists of 3.125-inch outer diameter by

0.180-inch nominal wall thickness hollow structural section in conformance with ASTM

A53 Grade B, Type E & S with a minimum yield strength of 35 ksi and a minimum tensile

strength of 60 ksi. The pier tube shaft coupling finish is plain steel.

5.4.3 External Sleeve: The central steel shaft of the external sleeve is 4.00-inch outer diameter

by 0.226-inch wall thickness hollow structural section in conformance with ASTM A500

Grade B or C with a minimum yield strength of 50 ksi and a minimum tensile strength

of 62 ksi. Two (2) bent steel stop plates are factory welded to one end of the external

sleeve. The plates are manufactured from 0.75-inch wide by 2.88-inch long by 0.25-

inch thick plate conforming to ASTM A36 with a minimum yield strength of 36 ksi and a

minimum tensile strength of 58 ksi. The external sleeve shaft finish is either plain steel

or hot-dip galvanized in accordance with ASTM A123.

5.4.4 Bracket: Retrofit bracket FS350BV is suitable for use with the PP350 push pier system.

The bracket finish is either plain steel or hot-dip galvanized in accordance with ASTM

A123. Bracket hardware finishes are zinc coated in accordance with ASTM B633.