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Barrettes

Resists large vertical and significant horizontal loads

Foundation support for bridges

01/03
Transbay聽Bus Ramp听听| 聽San Francisco, CA

We installed load bearing elements to a depth of 180 feet below grade as foundation support for a new bridge pylon as part of San Francisco鈥檚 Transbay Transit Center project.

Foundation support for buildings

02/03
Columbia University Manhattanville聽 |聽 Harlem, NY

We installed load bearing elements (barrettes) and drilled shafts (84 at 6 foot and 8 at 7 foot diameter) to support interior columns for the Phase 1 building of Columbia University鈥檚 massive Manhattanville campus expansion.

03/03
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Foundation support for bridges

01/02
Transbay聽Bus Ramp听听| 聽San Francisco, CA

We installed load bearing elements to a depth of 180 feet below grade as foundation support for a new bridge pylon as part of San Francisco鈥檚 Transbay Transit Center project.

Foundation support for buildings

02/02
Columbia University Manhattanville聽 |聽 Harlem, NY

We installed load bearing elements (barrettes) and drilled shafts (84 at 6 foot and 8 at 7 foot diameter) to support interior columns for the Phase 1 building of Columbia University鈥檚 massive Manhattanville campus expansion.

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What are barrettes?

Barrettes are load-bearing elements that are excavated rectangular piles used as foundations to resist large vertical and significant horizontal loads that can accompany the construction of diaphragm walls.

How do they work?

The same techniques utilized in diaphragm wall construction can be used to form individual barrettes of various shapes including I, T, X or L to accommodate top-down construction.

Why do you need barrettes?

Barrettes provide resistance to horizontal stress and to bending moments better than circular piles of the same section, so that one single pile is sufficient under each column or bearing element.

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