MH313B Helical Piles 18 Ton Ultimate – 9 Ton Allowable Capacity
Round shafts found in the MH313B Helical Piles, offer increased lateral and buckling resistance compared to square shafts. Patented alternating helix pattern reduces wobble and improves plumbness and tracking. 45-degree miter pilot point aids pile positioning and advancement. Patented MAGNUM? Dual-Cutting Edge helical bearing plates (DCE) enhance penetration through dense soils with occasional cobbles and debris. Sharpened edge on each helix slices through problem soils. True helix shape limits auguring and provides better quality assurance through valid capacity to torque correlations.
Additional information
Shaft | HSS 3.00" x 0.125" Nominal ASTM A513, Fy = 65 ksi, or Better |
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Helices | 3/8" Thick, Helix Die-Pressed ASTM A36, or Better 8", 10", 12", 14" & 16" Diameters Available |
Coating | |
Pitch | 3" |
Ultimate Capacity-to-Torque Ratio | 8 ft-1 |
Maximum Installation Torque | 4,500 ft-lbs |
Capacity by Torque | 18 Tons Ultimate Capacity 9 Tons Allowable Capacity |
Structural Capacity | 18 Tons Ultimate Capacity 9 Tons Allowable Capacity |
Description
Helical piers shall be installed to appropriate depth into suitable bearing stratum as determined by geotechnical engineer or local practice. Capacity by torque is based on advancing pier to maximum installation torque. A minimum factor of safety of 2.0 is recommended for determining allowable capacity from correlations with final installation torque. Deflections of 0.5" are typical at allowable capacity; a higher factor of safety may be required to achieve smaller deflections. For tension capacity, helical bearing plates must be deeply embedded (5 ~ 7 x ave. helix diameter or as specified by geotechnical engineer).
Load tests are recommended when practical.