Siefert Associates, LLC has successfully completed hundreds of projects since its inception.
Below is a sample of the projects that highlight our construction engineering capabilities in action. Imagine how our abilities can make your next project successful and profitable.
Location: New York, NY
Owner: Triborough Bridge & Tunnel Authority
Contractors: Restani Construction Corporation
Due to corrosion in the concrete foundations, the Manhattan approach of the bridge needed to be replaced. Siefert Associates, LLC was hired to design an extensive temporary shoring system, up to thirty  towers in total, to support the two-level viaduct structure and five  lanes of traffic on the bridge during all phases of construction. Extensive SOE designs were also needed to facilitate footing removal to bedrock without interrupting adjacent traffic.
Location: New York, New York
Owner: The Port Authority of New York and New Jersey
Contractors: American Architectural, Atlantic Hoisting & Scaffolding, DCM Erectors, EE Cruz, Gramercy Group, Granite Construction, Navillus Contracting, O’Kane Electrical, Peri Formwork Systems, Phoenix Construction, Skanska, Tutor Perini Corporation, and Yonkers Contracting Company, Winco Corporation/Sorbara Construction Corporation
Siefert Associates, LLC worked on numerous scopes since 200, including demolition and erection plans, analysis of slurry walls, design of temporary support, crane platforms, and protective shields, analysis of existing structure under construction equipment loading, design of temporary retaining walls and dunnage analysis. Notably, SALLC designed the trestle bridge, locally dubbed “The Siefert Bridge”, which created crane access for the installation of the memorial slab.