THE CONCRETE BRIDGE MAGAZINE

FALL 2011

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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A E S T H E T I C S C O M M E N T A R Y by Frederick Gottemoeller Simplicity is usually a virtue in bridge aesthetics, particularly in a natural environment. At such sites, bridges are usually a small part of a much larger scene. Simple, easily understood shapes make a strong impact where fussy details would be lost in the background. Unfortunately, simplicity can also equal boredom. Those simple shapes must be refned in ways that add interest and grace. The Covered Bridge over the Ken- nebec River in Norridgewock, Maine, achieves that goal. The shapes, including the cross bracing, are about as simple as they could be. At the same time, there is a lot of refnement here. The arch ribs taper from their thinnest point at midspan to match the tie girders at deck level. The cross braces have a subtle arch of their own. The dimensions and proportions are so thin that it's hard to believe that this is a concrete bridge. And the concrete allows simplicity at the joints, particularly at the arch rib-tie girder joint, that no other material could match. Finally, the thin cable hangers contrast dramatically with the concrete members of the bridge, giving the whole structure a light and open appearance. A fnal refnement is the way the parapets carry in a continuous line across the whole bridge. They are inside the arch but outside the ap- proach girders. Their overhang above the approach girders creates a shadow line that literally underlines the difference. Concrete tied arches once appeared frequently along American roads. It is great to see that tradition revived with such a straightforward and graceful example. EPOXY INTEREST GROUP ® Performance Of WEST V IR g INIA B RID g E D EC k S Constructed with Epoxy-Coated Reinforcing Bars EPOXY INTEREST GROUP WEST V IR Constructed with Epoxy-Coated Reinforcing Bars Review of Papers — CoRR osion RE sisTA nCE of Epoxy-Coated Reinforcing Bars in Florida Bridges EPOXY INTEREST GROUP $033 0G&QPYZ$PBUFE3FJOGPSDJOH#BST ! ! EPOXY INTEREST GROUP EPOXY INTEREST GROUP Corrosion r ATE s of s elect r einforcing Bars i n Macrocell Tests A comparison of AsTM A775 epoxy-coated and AsTM A1035 low-carbon, chromium reinforcing bars with requirements for AsTM A955 stainless-steel reinforcing bars A comparison of ASTM A775 epoxy-coated and ASTM A1035 low-carbon, chromium reinforcing bars with requirements for ASTM A955 stainless-steel reinforcing bars 6sE An% insTA--ATion of Epoxy-Coated Reinforcing Bars EPOXY INTEREST GRO UP 64&"/%*/45"--"5*0/ 0G&QPYZ$PBUFE3FJOGPSDJOH#BST EPOXY INTEREST GROUP Guidelines for Inspection and Acceptance of Epoxy-CoAtE d R EI nfoRCI nG StEE l at the Jobsite EPOXY INTEREST GROUP BRIDGES ©Photo courtesy of FIGG, photographer Tim Davis. STAY INFORMED... www.epoxyinterestgroup.org Epoxy-Coated Reinforcing Steel PROTECTION AGAINST CORROSION ASPIRE , Fall 2011 | 37 Book_Fall11.indb 37 9/29/11 11:59 AM

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