Erdman Anthony was retained by arch erector Cornell and Company, a subcontractor
to Cold Spring Construction on this $85 million project. The goal was to have
Erdman Anthony prepare erection plans for approval by NYSDOT. The firm worked
closely with staff engineers and project managers at Cornell and designed a
unique tie-back system that provided temporary support for arch-rib erection.
Rather than using an independent guyed temporary tower with tie backs,
or tall falsework bents from the forge base, the team decided to make use of the
new permanent steel bents located on the backs of the arch skewbacks. Lugs were
welded to the bent top to receive two fore ties that would facilitate arch-rib
segment erection and one back tie stayed by a concrete mass founded with steel
piles and rock anchors.
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