Maine Medical Center Coulombe Family Tower Expansion

As the structural engineer of record, SGH designed the steel-framed structure for the addition and dual-copter heliport. Highlights of our work include the following:

• Evaluating the existing building and developing a design for the heliport that required only a few of the base building columns to be strengthened

• Designing the addition’s steel-framed structure with moment frames to maximize space flexibility in the addition

• Designing a cantilevered heliport structure, including fall protection outriggers

• Incorporating features to improve the heliport structure’s durability, such as hot-dipped galvanized steel, a corrosion inhibiting concrete admixture, and a specific concrete formwork methodology to control cracking

• Collaborating with a heliport consultant and specifying stainless steel slab reinforcement to avoid magnetic interference with helicopter avionics

• Designing the new structures and analyzing the existing base building structure to support landing loads from the helicopters

SGH also consulted on the building enclosure design. In addition to assisting with the design of the wall, glazing, and roofing systems, SGH helped detail facade transitions from the existing building to the new addition; temporary waterproofing around new framing breaching the original roof; and waterproofing around the many roofing penetrations for screen walls, mechanical equipment, and the heliport structure.