Transition Coupler, SS175 to RS3500 Combo Pile, Bldg Code

The transition section adapts type Square Shaft (SS) helical lead sections to type Round Shaft (RS) extensions. The RS-SS combo pile transition coupler is used mainly in compression applications in areas where soft/loose soils are located above hard/dense soils.

• Square shaft lead allows better penetration of the helices into hard/dense material than round shaft (RS)
• SS reduces the occurrence of “spin-out” (loss of thrust of helices)
• RS material is less susceptible to buckling, provides greater lateral capacity, and greater moment capacity, than type SS material.
• Combination provides the installer with an easier-to-install square shaft lead section coupled with the capacity advantages of round shaft.