261 / 365
© 2014 Foundation Supportworks
®
,
Inc.
All Rights Reserved
p 261
APPENDIX 3A
BRACKET SPECIFICATIONS AND CAPACITIES
Chapter 3
Hydraulically-Driven Push Piers
Bracket:
Weldment manufactured from
3/8
”
and
1
” ASTM A36 plate.
Pier Tube:
Ø
4.000” x 0.226” wall x 36” long
ASTM A500 Grade B or C
Yield strength = 50 ksi (min)
Tensile strength = 62 ksi (min)
Available plain or hot-dip galvanized
(2)
FS400BV Bracket Specifications and Capacities
when used with the PP400 Push Pier System
Allowable Bracket Capacity
(3,4,5,6)
R
n
/Ω
(kips)
Plain
43.6
Plain Corroded
(1)
36.5
Galvanized Corroded
(1)
41.6
Maximum Drive Force During Installation
(6)
77.0
(1)
Corroded capacities include a 50-year scheduled sacrificial loss
in thickness per ICC-ES AC406.
(2)
Hot-dip galvanized coating in accordance with ASTM A123.
(3)
Brackets shall be used for support of structures that are
considered to be fixed from translation. Structures that are not
fixed from translation shall be braced in some manner prior to
installing retrofit brackets systems.
(4)
Allowable compression capacities consider continuous lateral
soil confinement in soils with SPT blow counts ≥ 4. Piers with
exposed unbraced lengths or piers placed in weaker or fluid
soils should be evaluated on a case by case basis by the project
engineer.
(5)
Concrete bearing assumes a minimum compressive strength
(f’c) of 2,500 psi. Local concrete bending and other local design
checks should be evaluated on a case by case basis by the
project engineer.
(6)
Push Piers shall be installed with a driving force exceeding the
required allowable service load by a sufficient factor of safety
(FOS). FOS is most commonly between 1.5 and 2.0, although
a higher or lower FOS may be considered at the discretion
of the pier designer or as dictated by local code or project
requirements.
Pier Tube Coupler:
Ø
3.500” x 0.216” wall x 8” long
Pier Starter Tube:
Pier tube section with
Ø
4.500” friction
reduction collar welded at leading end.
External Sleeve:
None
Cap Plate:
1-
1
” x 4.00” x 8.50” ASTM A572 Grade 50
with capture plate welded to one side.
Bracket Hardware:
(2) -
Ø
7/8
”x 18” long all-thread rod
Grade B7, tensile strength = 125 ksi (min)
Electrozinc plated per ASTM B633
Bracket Finish:
Available plain or hot-dip galvanized
(2)