BRIDGE ASSEMBLY, SWINGING BRIDGE METHOD
All bridge personnel must wear approved life jackets while
on the bridge. Failure to comply may result in injury or
death to personnel.
Exercise caution when walking near centerline of roadway;
the ponton alignment lugs project above the roadway surface
on interior bays and constitute a tripping hazard. Failure to
comply may result in injury to personnel.
The purpose of the swinging bridge method is to allow
connection of the bays along or near the shore where the
current will be considerably slower than in the main flow,
thereby making bay-to-bay connection easier. Once bay-to-
bay connections are complete, the bridge assembly is swung
into place upstream with the current. Although this may be
the most rapid method of construction, it has certain
limitations. For example, the exact length of the bridge must
be known, and the path for swinging the bridge must be free
of protruding rocks, sandbars, debris, or other constructions.
When constructing a bridge using this method, the bridge
must always be swung upstream. This method of deployment
depends on environmental factors that are determined in the
site layout prior to launch.
Transporters can be used for temporary anchorage.
a. Launch, secure, and connect two interior bays (2) and (3) (WP 0029 00 and
WP 0032 00), and anchor bays just downstream of bridge line (WP 0035 00).
b. Launch and secure ramp bay (1) (WP 0028 00) and connect to interior bay (2)
(WP 0030 00 or WP 0031 00).