NEW CONSTRUCTION

REMEDIAL REPAIR

HELICAL PULLDOWN® MICROPILE

SITE PREPARATION

ATLAS RESISTANCE® PIERS

TELECOM/SUBSTATION

RETAINING WALLS

EARTH RETENTION

HELICAL UNDERPINNING

PIPELINE STABILIZATION

SOIL SCREW®

HELICAL TIEBACK

HELICAL FOUNDATION SOLUTIONS

UTILITY/SOLAR

CERTIFIED INSTALLERMASON GRADY FOUNDATIONS

GENERAL CONTRACTOR F & G CONSTRUCTION

STRUCTURAL ENGINEERC & S ENGINEERING

GEOTECHNICAL ENGINEER

UNIVERSAL ENGINEERING

Hubbell Power Systems, Inc. is the

world’s leading helical pile/anchor

manufacturer. The CHANCE® brand

offers a technically advanced,

cost effective solution for the Civil

Construction and Electric Utility and

Telecommunications markets.

PROJECT:

An aircraft hangar was being constructed for Flagler County's Mosquito Control Division in Palm Coast, FL. A soil investigation at the project site discovered a layer of organic debris between two layers of dense sand. A deep foundation, therefore, was need to transfer the building loads below this organic layer. The piles would need to support compressive loads on the order of 24 kips, and tensile loads of 10 kips.

SOLUTION

CHANCE Helical Combo. Piles were chosen as the deep foundation option. The CHANCE Combo. Pile utilizes a square shaft lead section, and round shaft plain extensions, thus offering the best of both worlds. The square shaft offers superior penetration vs. round shaft leads, which allowed the piles to penetrate the dense layer of sand that was found above the organics. The round shaft extensions provided greater lateral resistance through the soft organic layer, as the surface area of the round shaft is greater than that of square.

continued

CASE HISTORY

CHANCE Digital Torque Indicator Mounted between the drive head and pile used to continuously monitor torque during installation.

CHANCE Civil Construction | Hubbell Power Systems, Inc. | hubbellpowersystems.com/abchance

©Copyright 2014 Hubbell Incorporated. Because Hubbell has a policy of continuous product

improvement, we reserve the right to change design and specifi cations without notice.

Printed in the U.S.A. | CH_04_067E

CASE HISTORY

Mason Grady Foundations specializes in CHANCE Helical Pile Systems primarily for foundations and retaining walls. The company is a certified CHANCE installer, we are family owned and operated, and we are a member of the CHANCE Alliance Network.

MASON GRADY FOUNDATIONS LLC GA(229)872-3991 FL (850)688-2005

CHANCE CERTIFICATION #1912-0009-3630

THE WORK

There were a total of 112 piles installed in one (1) 40 hour work week. Each pile was installed to support 24 kips in compression and 10 kips in tension with a factor of safety of two (2). Two (2) tension, and two (2) compression load tests were conducted prior to production pile installation. The piles installed were CHANCE Combo. Piles with a triple helix 8"/10"/12" SS5 (1-1/2"x1-1/2" square) lead section, and RS2875.203 (2-7/8" Round Shaft) plain extensions. Piles were equipped with a 7"x7"x1/2" square new construction plate to allow for connection to the poured concrete footings.

Square lead section being installed (back left)Round shaft extension being bolted to lead (right)Square shaft to round shaft transition fitting (front left)

Square shaft to round connectionCompression Test (top)Tension Test (bottom)

New Construction Plates installed to allow for pile and footing connection.