Micropiles/Tiedown Anchors are deep foundation elements constructed using high strength, small diameter steel casing and/or threaded bars. Micropiles can be installed with larger drilling equipment, or they can be installed with smaller equipment that can pass through doorways and operate in headroom of 10’, making micropiles ideally suited to structural upgrades, seismic retrofit and underpinning of existing structures.

Soil Nails are fully threaded steel bars, placed into pre-drilled holes and grouted to keep them in place. Soil nails are placed horizontally into the soil and provide support to a soil mass by transferring tensile loads throughout the ground area. Soil Nails are place in a close grid pattern of 5’ – 6’ horizontally and vertically. The face of the wall is usually done in 6’ staged lifts and mira drain, wire mesh reinforcement and shotcrete are applied during each 6’ lift. Soil nails can be installed with larger drilling equipment, or they can be installed with smaller equipment in tight spaces where access and noise control may be an issue.

A tieback is a sub-horizontal structural element — usually a bar or strand — installed into soil or rock to transfer tensile load into the ground. It's typically paired with retaining systems like soldier piles, sheet piles, or secant walls to add stability to cantilevered walls. One end fastens to the wall; the other anchors into stable ground or a deadman, resisting forces that would otherwise push the wall over (such as water pressure building behind a seawall after heavy rain). Installation is through a small-diameter drilled shaft, generally angled 15–45 degrees, either directly into a soldier pile or through a wale spanning between piles. Grouted versions run steel rods through the wall into the soil or bedrock beyond, with grout pumped in under pressure to boost resistance and keep the anchor from pulling out.