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ESR-3969 I Most Widely Accepted and-ii ted Page 2 of 10
<br /> 3.2.2 Brackets: Brackets are constructed from steel minimum yield strength of 116,000 psi (800 MPa)and a
<br /> plate and steel pipe components, which are factory- minimum tensile strength of 123,250 psi (850 MPa). The
<br /> welded together. The different brackets are described in couplers are factory-welded to shaft leads and
<br /> Sections 3.2.2.1 and 3.2.2.2. All brackets may be either extensions. The couplers may be either bare steel or
<br /> bare steel or hot-dipped galvanized in accordance with hot-dipped galvanized in accordance with ASTM A123.
<br /> ASTM A123. 3.3.4 Type A Side Load Brackets: The plates used to
<br /> 3.2.2.1 Type A Side Load Bracket: This bracket is fabricate Type A bracket's main body and T-brackets
<br /> used to support existing concrete foundations by conform to ASTM A572 Grade 50, having a minimum
<br /> transferring axial compressive loads from the existing yield strength of 50,000 psi (344 MPa) and a minimum
<br /> foundations to the helical pile. The bracket shelf is tensile strength of 65,000 psi (448 MPa). The 31/2-inch-
<br /> constructed of a 1/2-inch-thick (12.7 mm) steel plate outside-diameter round steel tubing that is factory-
<br /> measuring 13.75 inches (349 mm) wide by 12 inches welded to the bracket main body and the 21/4-inch-
<br /> (305 mm) long. The bracket shelf is factory-welded to outside-diameter(57 mm) round steel tubing which is a
<br /> %-inch-thick (12.7mm) steel plate stiffeners to form the part of the lifting T-bracket are made from steel
<br /> bracket main body. The bracket main body is factory- conforming to ASTM A500 Gr. C, having a minimum
<br /> welded to a 31/2-inch-outside-diameter (89 mm) round yield strength of 46,000 psi (317 MPa) and a minimum
<br /> hollow steel tubing having a nominal wall thickness of tensile strength of 62,000 psi (427 MPa). The fully
<br /> 0.25-inch (6.4 mm)minimum wall thickness and a length threaded rods conforming to ASTM A449, having a
<br /> of 18 inches (457 mm). See Figures 2 and 5 of this minimum tensile strength of 120,000 psi (827 MPa).
<br /> report. A lifting T-bracket (Tru-Lift Slider) consists of ASTM A563 Grade DH nuts and ASTM F436 washers
<br /> steel plates factory-welded to a 21/4-inch-outside- are used to fasten the treaded rods to the bracket. Type
<br /> diameter (57 mm) round hollow steel tubing having a A bracket may be either bare steel or hot-dipped
<br /> nominal wall thickness of 0.344-inch (8.7 mm) and a galvanized in accordance with ASTM A123.
<br /> length of 18 inches (457 mm). The lifting T-bracket 3.3.5 Type B Direct Load Brackets: The %-inch steel
<br /> (Tru-Lift Slider) is connected to the bracket main body bearing plate conforms to ASTM A572 Grade 50, having
<br /> with two /$-inch-diameter steel threaded rods, four a minimum yield strength of 50,000 psi (344 MPa)and a
<br /> matching steel nuts, and matching steel washers. See minimum tensile strength of 65,000 psi (448 MPa). The
<br /> Figures 2 and 5 of this report. The repair brackets may round hallowed steel casting conforms to ASTM A915
<br /> be either bare steel or hot-dipped galvanized in Grade SC8630, and having a minimum yield strength of
<br /> accordance with ASTM A123. 116,000 psi (800 MPa) and a minimum tensile strength
<br /> 3.2.2.2 Type B Direct Load Bracket: This bracket is of 123,250 psi (850 MPa). When required, the bolts
<br /> used with the helical pile system in new construction connecting the Type B bracket to the shaft/extension
<br /> where the steel bearing plate of the bracket is cast into must comply with Section 3.3.6 of this report. Type B
<br /> new concrete grade beams, footings, or pile caps. The brackets are made from either bare steel or hot-dipped
<br /> brackets can only transfer compression load between galvanized in accordance with ASTM A123.
<br /> the pile and the concrete foundation. Refer to footnotes 3.3.6 All Other Fastening Assemblies (Including
<br /> in Table 1 for requirements of concrete cover and Brackets): The bolts, used to connect the lead and
<br /> end/edge distance. The bracket consists of a 6-by-6-by- extension sections, or connect shaft to Type B bracket,
<br /> 1/2-inch-thick (152 by 152 by 13 mm) bearing plate conform to ASTM A325, having a tensile strength of
<br /> factory-welded to a round 3.43-inch-outside-diameter 120,000 psi (827 MPa). The matching hex nuts conform
<br /> (89mm) round hollow steel casting with a 3-inch-inside- to ASTM A563 Grade DH.The bolts and nuts can either
<br /> diameter(76 mm)and a length of 4.44 inches(113 mm). be bare steel or hot-dipped galvanized in accordance
<br /> The bracket is attached to the shaft in the field with two with ASTM A153.
<br /> 3 -inch(19 mm)standard hex bolts with matching 3/-inch
<br /> (19 mm) standard hex nuts. See Figure 1 of this report. 4.0 DESIGN AND INSTALLATION
<br /> The brackets maybe either bare steel or hot-dipped 4.1 Design:
<br /> galvanized in accordance with ASTM A123.
<br /> 3.3 Material Specifications: 4.1.1 General: Engineering calculations (analysis and
<br /> design) and drawings, prepared by a registered design
<br /> 3.3.1 Helix Plates: The 3/8-inch thick helix plates have professional, must be submitted to and be subjected to
<br /> an outer diameter of 8, 10, 12, or 14 inches (203, 254, the approval of the code official for each project, and
<br /> 305 or 356 mm) which are made from carbon steel must be based on accepted engineering principles, as
<br /> plates conforming to ASTM A572 Grade 50, and having described in IBC Section 1604.4, and must conform to
<br /> a minimum yield strength of 50,000 psi (345 MPa)and a IBC Section 1810. The design method for the steel
<br /> minimum tensile strength of 65,000 psi (488 MPa). The components is Allowable Strength Design (ASD),
<br /> helix plates are factory-welded to the lead shafts, and described in IBC Section 1602 and AISC 360 Section
<br /> are either bare steel or hot-dipped galvanized in B3.4. The engineering analysis must address helical
<br /> accordance with ASTM A123. foundation system performance related to structural and
<br /> 3.3.2 Helical Pile Lead Shafts and Extensions: The geotechnical requirements.
<br /> lead shafts and extensions are round hallowed steel The structural analysis must consider all applicable
<br /> tubes that conform to ASTM A500 Grade B/C, and internal forces (shears, bending moments and torsional
<br /> having a minimum yield strength of 60,000 psi moments, if applicable) due to applied loads, structural
<br /> (413 MPa)and a minimum tensile strength of 63,000 psi eccentricity and maximum span(s) between helical
<br /> (434 MPa). The lead shafts and extensions may be foundations.The result of this analysis and the structural
<br /> either bare steel or hot-dipped galvanized in accordance capacities must be used to select a helical foundation
<br /> with ASTM A123. system.
<br /> 3.3.3 Male and Female Couplers: The male and The PierTech direct load brackets (Type B brackets)
<br /> female couplers are round hallowed steel casting exert a force on the footing or grade beam in which they
<br /> conforming to ASTM A915 Grade SC8630, having a are embedded. The force is equal in magnitude and
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