PAINTING A MASTERPIECE WITH DRILLED SHAFTS - BUILDING THE SHERWIN-WILLIAMS HEADQUARTERS-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes foundation and ground-improvement work for Sherwin-Williams’ new headquarters campus in Cleveland, Ohio. On a seven-acre site, Keller worked with the project team to support a tower, five-story podium, parking garage, and two-story pavilion.<br /><br />The tower’s deep foundations comprised 28 production drilled shafts, 4 to 8.5 feet in diameter and 212 to 232 feet deep, socketed into shale. Construction required a new 70-meter Kelly bar, adaptations for erecting full-length reinforcement cages in a constrained site, and specialized procedures for bottom-hole cleaning and verticality checks. SQUID testing verified cleanliness on all 28 shafts; 27 met the 1% verticality limit. An O-cell load test led to increased rock-socket lengths, from 119 feet in the original design to 216 feet.<br /><br />For the podium and garage, soft clays extended to depths of roughly 180 feet. Rather than use deep foundations for these lighter structures, the team selected rigid inclusions beneath spread footings to control settlement. Aggregate piers supported the pavilion. The design team also accommodated expected differential movement where these structures connected to the tower, helping reduce costs. Keller additionally installed soldier piles for the garage excavation support system.<br /><br />Quality assurance included load and modulus testing, installation monitoring, grout-strength testing, and integrity checks using tools and software such as LiDAT and B-Tronic. The presentation also discusses working-platform safety, emphasizing the importance of equipment track pressures and hydraulic loads.<br /><br />Overall, the project required coordination among the owner, contractors, engineers, and testing partners to address exceptionally deep shafts, challenging ground conditions, tight site constraints, and settlement requirements while balancing performance and construction cost.

Keywords

Sherwin-Williams

foundation work

ground improvement

drilled shafts

rock socket

rigid inclusions

aggregate piers

soldier piles

load testing

settlement control