© 2014 Foundation Supportworks
®
,
Inc.
All Rights Reserved
p 205
APPENDIX 2H
DOCUMENTATION
Chapter 2
Helical Foundation Systems
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to any finding or other matter in this report, or as to any product covered by the report.
Copyright © 2014
Page 1 of 9
1000
ICC-ES Evaluation Report
ESR-3074
Reissued May 2014
This report is subject to renewal July 1, 2015.
| (800) 423-6587 | (562) 699-0543
A Subsidiary of the International Code Council
®
DIVISION: 31 00 00—EARTHWORK
Section: 31 63 00—Bored Piles
REPORT HOLDER:
FOUNDATION SUPPORTWORKS, INC.
12330 CARY CIRCLE
OMAHA, NEBRASKA 68128
(800) 281-5845
EVALUATION SUBJECT:
FOUNDATION SUPPORTWORKS HELICAL
FOUNDATION SYSTEMS
1.0 EVALUATION SCOPE
Compliance with the following codes:
2012, 2009 and 2006
International Building Code
®
(IBC)
Properties evaluated:
Structural
Geotechnical
2.0 USES
Foundation Supportworks, Inc. (FSI), Model HP288
Helical Foundation Systems are used either to underpin
foundations of existing structures or to form deep
foundations for new structures, and are designed to
transfer axial compression and axial tension loads from
the supported structures to suitable soil bearing strata.
3.0 DESCRIPTION
3.1 General:
The FSI Model HP288 helical foundation systems consist
of a central lead shaft with one or more helical-shaped
steel bearing plates, extension shafts, which may or may
not consist of helical bearing plates, shaft couplings that
connect multiple shaft sections, and a bracket that allows
for attachment to the supported structure. The shafts with
helix bearing plates are screwed into the ground by
application of torsion and the shaft is extended until a
desired depth and/or a suitable soil or bedrock bearing
stratum is reached.
3.2 System Components:
The FSI Model HP288 helical foundation systems include
a lead shaft (HP288L), extension shafts (HP288E), Type
A side-load brackets (FS288B and FS288BL), and Type B
direct-load brackets (HP288NCB and HP288NCB8), for
attachment to concrete foundations.
3.2.1 Helical Lead Sections and Extensions:
The FSI
helical pile lead sections consist of one or more helical-
shaped circular steel plates factory-welded to a central
steel shaft. The depth of the helical piles in soil is typically
extended by adding one or more steel shaft extensions
that are mechanically connected together by couplings, to
form one, continuous steel pile.
The central steel shaft of the lead and extension
sections is a round, 2
7
/
8
-inch-outside-diameter (73 mm),
0.276-inch-nominal-wall-thickness,
hollow
structural
section. The various shaft lead and extension
configurations are listed in Table 5.
Each helical steel bearing plate (helix) is 0.375 inch
(9.5 mm) thick, and has a 3-inch (76 mm) pitch and
spiral edge geometry with an outer diameter of 8, 10, 12
or 14 inches (203, 254, 305 or 356 mm). The helices are
welded to the helical shaft. The lead helix is located about
4 inches from the tip of the shaft lead section. The
extensions may consist of the shaft only or include helix
plates.
The extension section couplings consist of a round,
6-inch-long (152.4 mm), 3
1
/
2
-inch-outside-diameter
(89 mm), 0.281-inch-nominal-wall-thickness, hollow
structural section outer sleeve, and two
3
/
4
-inch-diameter
(19.1 mm) standard hex threaded bolts and matching
standard hex jam nuts. The pipe sleeve is factory-welded
to the end of the extension section. (See Figure 3.)
3.2.2 Brackets:
Brackets are constructed with factory-
welded steel plate and steel pipe components. The
different brackets are described in Sections 3.2.2.1
through 3.2.2.2.
3.2.2.1 Retrofit Bracket Assemblies FS288B and
FS288BL:
The FS288B and FS288BL bracket
assemblies are designed for use with the HP288 helical
shaft and are used to transfer axial compressive loading
from existing concrete foundations to the HP288 helical
piles. The bracket assembly consists of an FS288B or
FS288BL bracket, an external pipe sleeve (FS288ES30
or FS288ES48), a cap plate (FS288C), two threaded rods
and matching nuts. (See Figure 1.)
The FS288B and FS288BL brackets are constructed
from factory-welded, 0.250-inch-, 0.375-inch- and
0.500-inch-thick (6.4 mm, 9.5 mm, and12.7 mm) steel
plates.
The external sleeve (FS288ES30) is manufactured from
a 30-inch-long (762 mm), 3
1
/
2
-inch-outside-diameter
(89 mm) and 0.216-inch-nominal-wall-thickness pipe with
a factory-welded end ring which consists of a
3
/
4
-inch-long
(19.1 mm), 4.0-inch-outside-diameter (102 mm) and
0.226-inch-nominal-wall-thickness pipe. The FS288ES48
