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BLD2024-0473+Other+9.11.2024_3.16.46_PM+4494816
1 of 8 LONGITUDE ONE TWENTY° ENGINEERING & DESIGN Pile Review for Structural Compliance Date: July 8, 2024 Project Name: 16012 74th PI W - Foundation Stabilization Effort L120 Project # S230718-1XR Project Location: 16012 74th PI W, Edmonds, WA 98026 Client's Name: Delaney Doherty, Project Coordinator— R&R Foundation Specialist, LLC To whom it may concern, The purpose of this letter is to confirm helical and driven pile installation and capacity compliance with the structural requirements specified in the L120 Structural Calculation Package and Structural Site & Foundation Plan dated September 20, 2023. On June 24, 2024, one (1) driven concentric piles and eighteen (18) helical piles were installed by R&R Foundation Specialists (R&R) to stabilize the residence at 16012 74th PI W. To the knowledge of L120, these piles were installed by R&R certified installers in accordance with the cited structural package, ESR-3750, and ESR-4121. Please refer to the attached drive log provided by R&R. With pile spacing at a maximum of 6'-0" on -center, the minimum required vertical capacity as determined by L120 was an allowable loading of 6.0 kips and 8.0 kips. These demand requirements are as determined and specified in L120's structural calculation package cited above. As required by the referenced structural package, proof testing was to be performed to 200 percent of the specified design load. It is L120's understanding that the installers utilized the dead weight of the existing structure to achieve the required reaction of a test pile. Pile capacities for Ideal Manufacturing, Inc. helical piles have been calculated utilizing the torque correlation factors provided in ESR-3750. A torque/capacity chart detailing this calculation has been attached to this letter. Per the attached document, an Ideal Foundation Systems 2-7/8 in diameter 6k helical pile installed to a minimum pressure of 1,000psi results in an installation torque of 3,108 ft-lbs and an allowable capacity of 14.0 kips including a safety factor of 2. Pile capacities for Stabil-Loc, Inc. concentric driven piles have been calculated with the working pressure and effective area of the hydraulic cylinder utilized for installation. A pressure/capacity chart detailing this calculation has been attached to this letter in addition to the product data for the hydraulic cylinder used. Per the attached documents, a 2-7/8"0 driven pile installed with a Power Team C25C Hydraulic Cylinder, at a minimum pressure of 3,000psi, results in an ultimate capacity of 7.7 kips. 2 of 8 The results are summarized below: Helical: Maximum Demand (allowable) = 8.0 kips/pile Available Capacity (allowable) = 14.0 kips/pile Concentric Driven: Maximum Demand (allowable) = 6.0 kips/pile Available Capacity (allowable) = 7.7 kips/pile By inspection, the pile capacities of the installed helical and driven piles exceed the maximum loading demand or reached refusal as determined by L120's analysis. Therefore, the installed piles comply with the structural design/demand. Please contact us if you have any questions. Sincerely, Peter Modica, P.E. L120 Engineering & Design (L120) pmodica@1120engineering.com Mans R. Thurf)ell, P.E L120 Engineering & Design (L120) mthurfiell@1120engineering.com 3of8 .I Back 8. 11' -1 1/8 -7/8 -1 1/4 ---- LOCATE PILE WITHIN StX wall 6"-2' 3' OFCORNERM,�X 112 �8 OI 1/4 27' -1 2 1/4 14 Efl 7' CD 13 lmney LLI 16 b) 2%/8 to -3 -2 1 /8 ' J_ - !L -2 3/4 1 1-3 1/4-J Basement -1 1 12co v a 5 1 LOCATE PILE WITHIN 1/2 '3 3/ s 5/8 7 3' OF CORNER MAX 11 ix 10 (2) PILES @ 6' OC MAX yyel0 3 7. E �n (5) PILES @ 6' OC MAX oist's Run 1 1 A� 1 is /4 "'iiiiii to J Stem wall 6"x2' d co 3 -2 1/2 LOCATE PILE WITHIN s1 3' OF CORNER MAX (2) PILES @ 3" Stable-Loc Pile 6' OC MAX = 3" Helical Pile ON = Carbon Fiber Stitch Repair LOCATE PILE WITHIN On Existing Cracks In Foundation 3' OF CORNER MAXloist's Spaced 18"O.0 4of8 PROJECT NO. SHEET NO. S230718-1 PROJECT 16012 74th PI W, Edmonds, WA LONGITUDE SUBJECT ONE TWENTY° ENGINEERING & DESIGN BY PAM Foundation Stabilization DATE 09/20/23 Idea! Foundation Systems 2-7/8"0 Helical Pile (0.203-inch wall thickness) -Soil Capacity per ESR-3750 DIGGA 6K Drive Head Pressure Torque Correlation Factor, I(, Ultimate Axial Compressive Allowable Axial Compressive L120 ENGINEERING &DESIGN 5of8 PROJECT NO. SHEET NO. S230718-1 PROJECT 16012 74th PI W, Edmonds, WA LONGITUDE SUBJECT ONE TWENTY° ENGINEERING & DESIGN BY PAM Foundation Stabilization DATE 09/20/23 Stabil-Loc 2-7/8"0 i.) Power Team C25C Hydraulic Cylinder effective cylinder area has from manufacturer cut sheets ii.) Piles shall reach a pressure that correlates with an allowable capacity that meets or exceeds the maximum allowable load demand as listed in the structural package, but shall not exceed the maximum allowable capacity for any part of the pile assembly. III.) Referto ESR-4121 and Stobil-Coc, Inc. documents for additional information and requirements. iv.) 1 kip =1,000 Ibs Concentric Pier -Soil Capacity per by Installation Pressure Power TeamC25C Hydraulic Cylinder Pressure,p (psi) Cylinder Effective Area, A (in1) Ultimate Axial Compressive Capacity, P„ =p'A (kips) Allowable Axial Compressive Capacity, Pa=0.5;P, (kips) 1,000 5.15 5.2 2.6 1,500 5.15 7.7 3.9 2,000 5.15 10.3 5.2 2,500 5.15 12.9 6.4 3,000 5.15 15.5 7.7 3,500 5.15 13.0 9.0 4,000 5.15 20.6 10.3 4,500 5.15 23.2 11.6 5,000 5.15 25.3 12.9 5,500 5.15 23.3 14.2 6,000 5.15 30.9 15.5 6,500 5.15 33.5 16.7 7,000 5.15 36.1 13.0 7,500 5.15 33.6 19.3 3,000 5.15 41.2 20.6 3,500 5.15 43.3 21.9 9,000 5.15 46.4 23.2 9,500 5.15 43.9 24.5 L120 ENGINEERING &DESIGN Technical Dimensions Cylinder Load Caps furnished with °C Series Cylinders: Ordering Information iJ H �j K B� E4 + - - A D� F �I C I.<-- t C10010C used in this lift application. L: Bore Cylinder Outside •. .• Dia. Effective Press. at wt. Lam� Dia. Thread Collar to ton •.d 10,000 ed Thread Po .. Thread. Depth17 1.00 1.10 1 4.34 5.44 1.50 1 1/2-16 1.13 0.75 1.00 3/4-16 x 0.63 0.25 1.13 0.994 10,061 4.97 2.25 3.25 3.20 6.50 9.75 1.50 1 1/2-16 1.13 0.75 1.00 3/4-16 x 0.63 0.25 1.13 0.994 10,061 4.97 3.26 5.25 5.20 8.50 13.75 1.50 1 1/2-16 1.13 0.75 1.00 3/4-16 x 0.63 0.25 1.13 0.994 10,061 4.97 4.00 7.25 7.20 10.75 18.00 1.50 1 1/2-16 1.13 0.75 1.00 3/4-16 x 0.63 0.25 1.13 0.994 10,061 4.97 5.00 9.25 9.20 12.75 22 000 1.50 1 1/2-16 1.13 0.75 1.00 3/4-16 x 0.63 0.25 1.13 0.994 10,061 4.97 5.80 1.00 2.20 3.63 4.63 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 1 2.236 1 8,948 11.20 1 4.00 2.13 4.80 4.75 6.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 5.00 4.13 9.20 6.75 10.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 6.70 6.13 13.70 9.75 15.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 9.40 8.13 19.90 11.75 19.88 2.25 0.75 1.50 1-8 x 0.75 21/4-14 1.13 0.25 1.69 2.236 8,948 11.20 11.00 10.13 22.60 13.75 23.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 13.00 12.13 27.10 15.75 27.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 14.60 14.13 31.60 17.75 31.88 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 16.20 16.00 36.10 20.50 36.50 2.25 21/4-14 1.13 0.75 1.50 1-8 x 0.75 0.25 1.69 2.236 8,948 11.20 18.50 1.00 3.10 4.88 5.88 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 7.50 2.13 6.70 5.88 8.00 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 8.90 4.13 12.90 7.88 12.00 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 11.50 6.13 19.20 10.69 16.81 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 15.30 8.13 25.50 12.69 20.81 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 17.90 10.13 31.80 14.69 24.81 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 20.70 12.13 38.10 16.69 28.81 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 23.20 14.13 44.40 18.69 32.81 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 26.00 16.00 50.30 20.56 36.56 2.75 2 3/4-16 1.13 0.75 1.75 1-8 x 0.75 0.25 2.00 3.142 9,549 15.70 28.20 1.00 5.10 5.50 6.50 3.38 3 5116 12 1.94 1.00 2.25 1 1/2-16 x 0.88 0.38 2.56 5.15 9,699 25.80 11.90 2.00 10.30 6.50 8.50 3.38 3 5/16-12 1.94 1.00 2.25 1 1/2-16 x 0.88 0.38 2.56 5.15 9,699 25.80 13.90 4.00 20.60 8.50 12.50 3.38 3 5/16-12 1.94 1.00 2.25 1 1/2-16 x 0.88 0.38 2.56 5.15 9,699 25.80 17.60 6.25 32.20 10.75 17.00 3.38 3 5/16-12 1.94 1.00 2.25 1 112-16 x 0.88 0.38 2.56 5.15 9,699 25.80 21.70 8.25 42.50 12.75 21.00 3.38 3 5/16-12 1.94 11.00 2.25 1 1/2 16 x 0.88 0.38 2.56 5.15 9,699 25.80 25.60 10.25 52.80 14.75 25.00 3.38 3 5116-12 1.94 1.00 2.25 1 1/2-16 x 0.88 0.38 2.56 5.15 9,699 25.80 29.30 12.25 63.20 16.75 29.00 3.38 3 5/16-12 1.94 1.00 2.25 1 1/2-16 x 0.88 0.38 2.56 5.15 9,699 25.80 33.10 14.25 73.50 18.75 33.00 3.38 3 5/16-12 1.94 1.00 2.25 1 112-16 x 0.88 0.38 2.56 5.15 9,699 25.80 36.80 8.25 53.55 12.80 21.05 4.00 4-12 2.00 1.00 2.50 1 1/2-16 x 0.88 0.38 2.87 6.46 9,243 32.50 36.5 2.00 22.10 6.88 8.88 5.00 5-12 2.19 1.38 3.13 None 0.13 3.75 11.04 9,959 55.20 32.50 4.25 46.90 9.13 13.38 5.00 5-12 2.19 1.38 3.13 None 0.13 3.75 11.04 9,959 55.20 41.30 6.25 69.00 11.13 17.38 5.00 5-12 2.19 1.38 3.13 None 0.13 3.75 11.04 9,959 55.20 51.00 10.25 113.20 15.13 25.38 5.00 2.19 1.38 3.13 None 0.13 3.75 9,959 5-12 11.04 55.20 67.00 13.25 146.30 18.13 31.38 5.00 5-12 2.19 1.38 3.13 None 0.13 3.75 11.04 9,959 55.20 78.00 6.13 97.40 12.38 18.50 5.75 5 3/4-12 1.75 1.25 3.75 None 0.13 4.50 15.90 9,434 79.50 73.50 13.13 208.70 19.38 32.50 5.75 5 3/4-12 1.75 1.25 3.75 None 0.13 4.50 15.90 9,434 79.50 109.50 2.00 41.20 8.63 10.63 6.25 61/4-12 2.25 1.63 4.13 None 0.13 5.13 20.62 9,695 103.10 63.00 11 6.63 137.00 13.25 19.88 6.25 61/4-12 2.25 1.63 4.13 None 0.13 5.13 20.62 9,695 1 103.101 91.00 10.25 11 1 211.50 16.88 27.13 6.25 61/4-12 2.25 1.63 4.13 None 0.13 5.13 20.62 1 9,695 1101101 113.00 powerteam.com 12 MM-10K MOUNTS AVAILABLE TO SUIT STAND ON MINI MACHINES AND MINI EXCAVATORS UP TO 3.5T Lightweight hand-held screw anchor drive for the installation of screw piles in confined or low access sites such as crawl spaces. This unit can be powered by portable hydraulic power packs. FEATURES • Compact high torque Digga manufactured gearbox • Lightweight and compact for ease of movement in confined spaces • Fitted with a high efficiency Eaton/Digga geroler hydraulic motor • Motor mounted pressure relief valve fitted standard (HH-6K) • Over 34 years design and manufacturing experience • 1 yr gearbox and 1 yr motor warranty SPECIFICATIONS MODEL HH-6K MM-10K Theoretical Torque (ft-Ibs) 6,528 @ 2,100psi 10,478 @ 3,OOOpsi Expected Torque (ft-Ibs) 4,765 @ 2,100psi 8,040 @ 3,OOOpsi (73% efficiency) (77% efficiency) Max Pressure 2,100psi @ 11 gpm 3,OOOpsi @ 18.5gpm Max Flow 15gpm @ 2300psi 18.5gpm @ 3000psi Max Horse Power 20 33 Pressure Relief Valve Included NA Standard Output Shaft 2" Hex 2.5" Hex -Short Weight (Ibs) 90 138 Overall Length (in) 20" 24.1" Diameter (in) 9.5" 11.4" HH-6K Hand-held unit is not suitable for machine mounting. Warranty void if used on machines. OUTPUT SPEED & TORQUE HH-6K OUTPUT SPEED GPM RPM 7 7 8 8 9 9 10 10 12 12 13 13 14 14 15 15 OUTPUTTORQUE PSI FT-LBS 500 1,554 750 2,331 1,000 3,108 1,250 3,886 1,500 4,663 1,750 5,440 2,000 6,217 2,100 6,528 MM-1OK OUTPUT SPEED GPM RPM 7 6 8 7 9 8 10 9 11 10 12 11 13 11 14 12 15 13 16 14 17 15 18 16 OUTPUTTORQUE PSI FT-LBS 500 1,746 1,000 3,493 1,500 5,239 2,000 6,985 2,500 8,732 3,000 10,478 Output speed and torque specifications are THEORETICAL. Speed and torque output are dependent on the overall system efficiencies associated with the prime movers hydraulic system. This document should be used for information and comparative purposes only. When determining criteria, & application specific information is required, please contact DIGGA. 8of8 Digga - Speed & Torque Chart Model Code: MM - 10K GF: 262 rpm vs Ipm 20 a 15 10 v W 5 a Vf 0 0 20 40 60 80 Flow rate (Ipm) Max. Flow (Ipm) 70 Max. Speed (rpm) 16 Output Torque Differential Pressure Display Nm Bar 2,360 34 2,832 41 3,303 48 3,775 55 4,247 62 4,719 69 5,191 76 5,663 83 6,135 90 6,607 7,079 97 103 7,551 110 8,023 117 8,495 124 8,967 131 9,438 138 9,910 145 10,382 152 10,854 159 11,326 166 11,798 172 12,270 179 12,742 186 13,214 193 13,686 200 14,158 207 rpm vs gpm 20 a 15 a 10 v °J 5 n 0 0 5 10 15 Flow rate (gpm) Max. Flow (gpm)l 18 Max. Speed (rr)m)l 16 9C Differential Pressure Display Output Torque PSI Ibf-ft 500 1,740 600 2,088 700 2,437 800 2,785 900 3,133 1,000 3,481 1,100 3,829 1,200 4,177 1,300 4,525 1,400 4,873 5,221 1,500 1,600 5,569 1,700 5,917 1,800 6,265 1,900 6,613 2,000 6,961 2,100 7,310 2,200 7,658 2,300 8,006 2,400 8,354 2,500 8,702 2,600 9,050 2,700 9,398 2,800 9,746 2,900 10,094 3,000 10,442 * IMPORTANT: This chart is based on theoretical values and is provided as a guide only. Digga accepts no responsibility complying with any installation requiring certain torques being reached. You will need to consult an engineer.