An arched bridge for the Denver Regional
Transportation District’s light rail system was
designed with arches that matched other
One forming challenge was that the curve was
designed with more than one radius and this
same element needed to be repeated multiple
times. Another concern was that the forms
could not be supported by the ground because
of flowing water and wet soil.
The Flex-Form inside forms were tied to
Max‑A‑Form outside forms with 1" lagstud
through Flex‑Form tie bearing brackets and 5"
Versiform walers secured to the Max-A-Form
panels. Tie hardware consisted of Max-A-Form 7/8"x5"x7" flat washers and 1" contour nuts.
The contractor was impressed with how the
various systems combined to produce a pro‑
ductive assembly that simplified construction
by reducing setup and tear-down operations.