High Rise Construction in San Francisco

Malcolm Successfully Sinks San Francisco’s Deepest Shafts

Malcolm has successfully completed the installation of 44 deep foundation shafts for the new 181 Fremont Street, a new 800-ft, 55 Story building in San Francisco. The office high-rise will become the second tallest building in San Francisco. The building sits on landfill where the bay used to encroach and called for the implementation of shafts averaging 262-ft deep with each 5 to 6-ft in diameter to support the building’s foundation. To date the shafts for 181 Fremont are the deepest on record for San Francisco.The most challenging part of project so far involved the design and setup of the 140-ft by 140-ft job site. The required equipment for the project included a 180 ton crane, a BAUR BG46 drill rig, 7 Baker 21,000 gallon open tanks (each measuring 8.5-ft wide by 30-ft long), and the all the necessary tools and ancillary machines. To create additional storage, the Malcolm team erected scaffolding over the Baker tanks.

“Logistics were critical for this project.” commented Eleazar Sotelo, Malcolm’s Project Manager. “The 262-ft cages for the shafts were delivered in three 72-ft sections during the evening when traffic was at a minimum. The timing was critical to keep the project on schedule.”

Malcolm is under contract with Level 10 Construction to provide drilling, shoring with CSM, excavation and internal bracing, and foundation services. Now that the shafts are finished the Malcolm team will move into excavation.

For More information contact Malcolm’s Project Manager at esotelo@malcolmdrilling.com