Phased construction of aluminum-clad elevated pedestrian walkways and circulation nodes. Selective demolition and reconstruction of terminal structures.

Weidlinger Associates provided structural engineering services for the aluminum-clad elevated walkways that were a key element of the Logan modernization program. The enclosed bridges, which provide pedestrian access to four terminals from existing and new parking garages, were supported on cast-in-place concrete piers and columns 45 feet above ground level. Vertical pedestrian circulation structures, located close to the end points at garages and terminals, also provided support for the walkways. The walkway floors are concrete on metal deck with moving sidewalks at the outboard sections near the glass curtain walls. The circulation nodes house mechanical and electrical rooms that supply conditioned air and power for the moving sidewalks. The longest walkway span is the 260 feet from terminal B to the garage.

The walkways walls are essentially structural steel trusses, designed to integrate roof and floor construction. From outside, travelers see the web of X-shaped trusses. From inside, they see the web, the top surface of the bottom chord, and the bottom surface of the top chord; the rest of the truss is covered by the floor and ceiling systems. The trusses have an overall depth of 18 feet and wide-flange top and bottom chord sections.

Completion Date: 2002
Location: Boston, Massachusetts
Owner or Client: Massport
Prime Consultant(s): Cambridge Seven Associates