Calvin Coolidge Bridge
Northhampton, MA United States | 2004
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CloseThis bridge is the primary link between two downtown districts in the heart of Hamilton and its historic civic center, carrying 40,000 vehicles a day over the Great Miami River. The bridge railing became a critical contributing element to the overall aesthetic character of the bridge. Providing a unique balance of strength and architectural expression, the railing is designed to be structurally stout to withstand vehicular impact, yet attractive, open and inviting to encourage sweeping views of the river.
A duplex system was chosen because the design warranted durable and dependable corrosion protection, especially for portions embedded in the structure and with anticipated frequent use of de-icing chemicals. Corrosion that might compromise the structural integrity or visual quality of the railing could not be tolerated. The need for light crane loading, off-loading, and field positioning called for a durable abrasion resistant coating system. The duplex system gives the added assurance that even if the outer paint coatings seem damaged during handling, the underlying primary galvanized protection remains uncompromised while the surface paint coatings are readily repaired.
Since pedestrians experience the railing up close, the visual appearance is of even greater importance. The entire railing received a sweep blast and 2-coat epoxy-polyurethane paint system with a black finish color. The fully shop=applied coating system helped contain costs. Maintenance needs for the paint-over-galvanize surface are anticipated to be less than for any other colored coating system; plus, it can be readily retouched or repainted as needed in the future.
Details
Award Class
Newly Complete
Award Sectors
Bridge & Highway
Duplex Systems
Environment
Industrial/Urban
Location
Hamilton, OH United States
Reasons for Galvanizing
Coating Durability
Tonnage/Size
Steel: 140
HDG: 140
Team Members
Specifier
Ohio DOT and the City of Hamilton, Ohio
Architect
Burgess & Niple, Inc.
Engineer
Burgess & Niple, Inc.
Other
Ohio Structures/Greiner Industries
Member Galvanizer(s)
V&S Columbus Galvanizing
Related
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