An article about DBM Contractors of Federal Way, Washington. They are a specialty geotechnical contractor and are working on the Capital Hill Station for the Sound Transit light rail system in the Seattle Metro area.
The earth retention system required DBM to install 141 each anchored steel temporary soldier piles averaging nearly 100 feet deep, 1,118 each temporary tieback anchors, 363 Double Corrosion Protection (DCP) soil nails plus 11,840 square feet of 8-inch temporary shotcrete facing, 81,270 square feet of treated timber lagging and one row of 6 each 36-inch diameter pipe struts and double wide flange (WF) beam walers for “cross-lot” excavation support and to support the streets and sidewalks of the surrounding city blocks.
[Source: The Federal Way News. Image: FederalWayNews.net]