Fortress Stabilization Case Study

Riverside Residential Building in Michigan Tourist Town

Located on the Kalamazoo River in Saugatuck MI, the Holiday Hill apartments have endured decades of fluctuations in water levels including times when the water rose above the seawall and flooded the apartments.

Kent Companies of Grand Rapids, Michigan was brought into perform a variety of foundation repair services including installing piers to stabilize the structure.

The back side of the complex consists of a 130' poured wall that was leaning inwards because of the pressure caused by the adjacent street and sidewalks. Because of the proximity to the street, excavating and pulling the wall back was not an option so the engineers specified reinforcing it with Carbon Fiber.

The anchored InvisiBeam® system was chosen because of its superior strength and simplicity of installation. Since the floor joists were running parallel to the wall being reinforced, and there was no accessible lumber for the InvisiBeam® post-tensioned top anchors, the Fortress aluminum angle brackets were chosen and installed into blocking between the joists on all 33 straps.

In addition to the InvisiBeam® straps, multiple cracks were stitched using the Fortress Crack Stitch. These cracks were caused by a combination of inward deflection and settlement. The cracks were also filled with Xtreme 4070 structural epoxy.

Installation Photos - Click to Expand