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132 ICC EVALUATION SERVIC[ L on Most Widely Accepted and Trusted ICC-ES Evaluation Report ESR-3969 Issued January 2017 This report is subject to renewal January 2018. www.icc-es.orq I (800)423-6587 I (562) 699-0543 A Subsidiary of the International Code Council® DIVISION:31 00 00—EARTHWORK 3.2 System Components: Section:31 63 00—Bored Piles 3.2.1 Helical Piles:The PierTech helical pile lead shaft REPORT HOLDER: sections consist of one or more (up to four) helical- shaped circular steel plates factory-welded to the lead PIERTECH SYSTEMS, LLC steel shaft. The extension shaft sections have shafts 17813 EDISON AVENUE,SUITE 100 similar to the lead shaft sections, except without the CHESTERFIELD,MISSOURI 63005 helical plates. The depth of the helical piles in soil is (636)536-5007 typically extended by adding one or more steel shaft www.piertech.com extensions that are mechanically connected together by couplers to form one continuous steel pile. EVALUATION SUBJECT The shaft lead sections and extension sections consist of a 27/8-inch-outside-diameter (73 mm) round hollow PIERTECH HELICAL FOUNDATION SYSTEMS steel tubing having a nominal wall thickness of 0.217-inch(5.5 mm)minimum wall thickness. 1.0 EVALUATION SCOPE Each helical steel bearing plate (helix) is 3/8-inch Compliance with the following codes: (9.5 mm) thick and has spiral edge geometry with an outer diameter of 8, 10, 12 or 14-inches (203, 254, 305 2015,2012,and 2009 International Building Code®(IBC) or 356 mm). The helix plates are pressed to form a Properties evaluated 3-inch (76.2 mm) pitch, which is the distance between the leading and trailing edges. The lead helix is located Structural and geotechnical near the tip (bottom end) of the shaft lead section. For 2.0 USES multiple helix installation, the helical bearing plates are spaced three times the diameter of the lowest plate apart The PierTech helical foundation systems are used either starting at the toe of the lead section. Typically, the to underpin foundations of existing structures or to form smallest diameter helical bearing plate is placed near the deep foundations for new structures; and are designed tip (bottom)of the lead section and the largest diameter to transfer compression load from the supported helical bearing plate is placed nearest the top (trailing structure to suitable soil bearing strata. Underpinning of end)of the lead section or on an extension section. existing foundations is generally achieved by attaching The helical pile lead shaft sections and extension the helical piles to the side-load brackets,which support sections are connected together by bolting the male and only compression loads. Deep foundations for new female couplers. The male coupler consists of a construction are generally obtained by attaching the 2.875-inch-oustside-diameter (59 mm) round hollow helical piles to direct-load brackets that are embedded in steel casting, as shown in Figure 3. The female coupler concrete pile caps, footings, or grade beams, which consists of a 3.42-inch-outside-diameter (87 mm) round support only compression load. hollow steel casting with a 3.31-inch-inside-diameter 3.0 DESCRIPTION (84 mm), as shown in Figure 4. Each extension section consists of a female coupler and a male coupler which 3.1 General: are welded, in the factory, to the opposing extension The PierTech helical foundation systems consist of a ends. Each lead shaft section consists of a male coupler lead shaft section with one or more helical-shaped steel that is welded, in the factory, to the top end of the lead bearing plates (or helices), extension shaft section(s), shaft. Connection of extension sections to the lead shaft couplings that connect multiple shaft sections, and a or other extension sections is made by through-bolted bracket that allows for attachment to the supported connections with two 3/4-inch-diameter (19 mm) steel structures. The shafts with helix bearing plates are bolts through the extension section's female coupler and screwed into the ground by application of torsion and the the connected lead section or extension section's male shaft is extended until a desired depth or a suitable soil coupler. Figures 3 and 4 illustrate the female coupler or bedrock bearing stratum is reached. The bracket is and the male coupler. then installed to connect the pile to the concrete Lead sections and extension sections may be either foundation of the supported structure. See Figure 5 of bare steel or hot-dipped galvanized in accordance with this report. ASTM A123. ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed,nor are they to be construed El A—I as an endorsement of the subject of the report or a recommendation for its use.There is no warranty by ICC Evaluation Service,LLC,express or implied,as NS to any finding or other matter in this report,or as to any product covered by the report. ,,,,A„„ „ mxa was Copyright©2016 ICC Evaluation Service,LLC. All rights reserved. Page 1 of 10