Transmission And Substation Foundations - Technical Design Manual
SECTION 6: PRODUCT DRAWINGS AND RATINGS Helical Direct Jack Underpinning Brackets
Building Code Compliance per ICC-ES ESR-2794 The following tables provide the nominal, LRFD design, and ASD allowable compression strengths of C1500738, C1500840, and C1500841 foundation repair brackets, T-pipes, and Type SS5, RS2875, and RS3500 helical piles as evaluated per ICC-ES Acceptance Criteria AC358. These strengths are published in ICC-ES ESR-2794. The strengths listed are based on three different concrete foundation strengths and
two different soils conditions—firm and soft. The pile head is assumed to be fixed within the bracket assembly, and the piles are assumed to be braced. Per the International Building Code (IBC) 2006 Section 1808.2.9.2 & IBC 2021 Section 1810.2.1, piles can be considered fixed and laterally supported at 5 feet below the ground surface in firm soil and at 10 feet in soft soil.
Nominal Strengths of C1500738 Remedial Repair Brackets & Helical Piles 1,2,3,4,5 Bracket Catalog Number T-Pipe Catalog Number Pile Model
Nominal Strength in Axial Compression (Kip) [Kn] 2500 Psi Concrete 5 3000 Psi Concrete 5
4000 Psi Concrete 5
Firm Soil 79.4 [353]
Soft Soil 25.9 [115]
Firm Soil 79.4 [353]
Soft Soil 25.9 [115]
Firm Soil 79.4 [353]
Soft Soil 25.9 [115]
Incl. w/ bracket SS5
C1500738
Incl. w/ bracket RS2875.203 80.7 [359]
63.0 [280]
80.7 [359]
63.0 [280]
80.7 [359]
63.0 [280]
C1500840
Incl. w/ bracket RS2875.276 85.1 [379]
70.2 [312]
85.1 [379]
70.2 [312]
85.1 [379]
70.2 [312]
C1500840
Incl. w/ bracket RS3500
100 [445]
95.3 [424]
100 [445]
100 [445]
100 [445]
100 [445]
C1500841
LRFD Design Strengths of C1500738 Remedial Repair Brackets & Helical Piles 1,2,3,4,5 Bracket Catalog Number T-Pipe Catalog Number Pile Model
Nominal Strength in Axial Compression (Kip) [Kn] 2500 Psi Concrete 5 3000 Psi Concrete 5
4000 Psi Concrete 5
Firm Soil 71.4 [318]
Soft Soil 23.3 [104]
Firm Soil 71.4 [318]
Soft Soil 23.3 [104]
Firm Soil 71.4 [318]
Soft Soil 23.3 [104]
Incl. w/ bracket SS5
C1500738
Incl. w/ bracket RS2875.203 72.6 [323]
56.7 [252]
72.6 [323]
56.7 [252]
72.6 [323]
56.7 [252]
C1500840
Incl. w/ bracket RS2875.276 76.6 [341]
63.1 [281]
76.6 [341]
63.1 [281]
76.6 [341]
63.1 [281]
C1500840
Incl. w/ bracket RS3500
85.8 [382]
85.8 [382]
90 [400]
90 [400]
90 [400]
90 [400]
C1500841
ASD Allowable Strengths of C1500738 Remedial Repair Brackets & Helical Piles 1,2,3,4,5 Bracket Catalog Number T-Pipe Catalog Number Pile Model
Nominal Strength in Axial Compression (Kip) [Kn] 2500 Psi Concrete 5 3000 Psi Concrete 5
4000 Psi Concrete 5
Firm Soil 47.5 [211]
Soft Soil 15.5 [69]
Firm Soil 47.5 [211]
Soft Soil 15.5 [69]
Firm Soil 47.5 [211]
Soft Soil 15.5 [69]
Incl. w/ bracket SS5
C1500738
Incl. w/ bracket RS2875.203 48.3 [215]
37.7 [168]
48.3 [215]
37.7 [168]
48.3 [215]
37.7 [168]
C1500840
Incl. w/ bracket RS2875.276 51 [227]
42 [187]
51 [227]
42 [187]
51 [227]
42 [187]
C1500840
Incl. w/ bracket RS3500
60 [267]
60 [267]
60 [267]
60 [267]
60 [267]
60 [267]
C1500841
Notes: For SI: 1 kip = 4.448 kN. 1. Refer to Section 4.1.3 of ICC-ES ESR-2794 for descriptions of fixed condition, pinned condition, soft soil, and firm soil. 2. Strength ratings are based on a design corrosion level of 50 years and presume the supported structure is braced in accordance with Section 1810.2.2 of the 2021 IBC (Section 1808.2.5 of the 2006 IBC). 3. Strength ratings apply to the specific bracket, T-pipe, and pile/anchor models listed. 4. See Section 4.1.2 of ICC-ES ESR-2794 for applicable limit states that must be evaluated by a registered design professional. 5. Refer to the specified compressive strength of concrete at 28 days.
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