Structural + Seismic Experience
We deliver highly complex structural and seismic upgrade projects, often in occupied and physically constrained environments. Our ability to successfully execute these challenging scopes comes from meticulous advance planning and a deep understanding of sequencing and interdependent work — particularly when structural upgrades drive other critical project activities.
Whether constructing a six-story steel-frame exoskeleton at the Ambassador Hotel or drilling micropiles in the 14-foot basement of the Ritz Hotel, D+H Construction brings unparalleled experience to complex seismic retrofits in both occupied and unoccupied buildings.
Successful execution of this work—especially in historic structures—requires detailed planning and collaborative problem-solving. Hidden conditions, previous modifications, and limited access are challenges we anticipate rather than react to.
During pre-construction, we work closely with the Owner and Architect to:
- Identify potential unknowns and associated work to establish a complete and accurate budget
- Strategize constructability and logistical sequencing
- Develop schedules that reflect real-world constraints, including site access, phased work, relocation needs, and the safety of occupants and crews
This proactive approach allows us to deliver highly technical seismic upgrades safely, efficiently, and predictably.
- Fiber Reinforced Polymer (FRP) upgrades for precast concrete buildings
- Multi-story and soft-story moment and braced frame installations
- Micropile installation in constrained existing conditions
- Shotcrete shear and retaining walls
- Added foundations and grade beams
- Building shoring and underpinning
- Structural steel reinforcement of masonry structures
- Out-of-Plane wall anchoring
- Shear wall installation in concrete and wood-framed buildings
- Diaphragm strengthening
- Dry rot repair and replacement of primary structural members
