Developer/OwnerGuam Healthcare Development, Inc.
Contractordck pacific guam, LLC
Guam Regional Medical City (GRMC) is a new 260,000 SF, 130-bed state of the art hospital that will include 15 dedicated emergency beds, 15 intensive care rooms, eight surgery rooms, a birthing center and a neonatal care unit. It is five stories tall with a partial basement at one end. The structural system consists of spread/mat foundations, cast-in-place concrete walls/columns and a precast double tee floor/roof system. The exterior of the facility consists of ribbon windows, curtain walls and precast concrete cladding.
Because the schedule was aggressive, foundation design was fast-tracked to allow the Owner to meet their preferred opening date. Foundation design was completed when the remainder of the building was only at 65% design level. This involved extensive coordination and using tools such as Revit streamlined the process.
In addition to being structural engineer of record, BASE also provided the building code required special inspections. This allowed for seamless coordination between the design and construction of the primary structure.
The Science and Design of Structural Engineering
BASE investigated various systems for the structural system including cast-in-place concrete, structural steel and precast concrete. Although not nearly as prevalent as cast-in-place concrete and structural steel for hospital construction, precast concrete was ultimately selected in order to address the unique construction challenges of being on a remote island. Cost and schedule also played a significant role in this decision. BASE was integral in ensuring that the strict functional requirements of the GRMC could be met with the precast concrete system.
The facility was designed as an essential facility with extremely high seismic forces (seismic design category D) and typhoon loading (170 mph wind speed). The precast concrete floor system was analyzed and designed for stringent vibration limitations for both patient comfort and sensitive equipment. The fourth and fifth floors (patient rooms) were designed for a maximum vibration velocity of 8000 min./sec (and maximum peak acceleration of 0.5% g) and the first through third floors (surgery, operating rooms etc.) were designed for a maximum velocity of 4000 min./sec (and maximum peak acceleration of 0.2% g).