TM-5-5420-279-10
Parallel Modules
NOTE
It should be noted that the parallel modules are interchangeable and reversible when
connecting to each other and ramp modules.
2.3.3.1
The parallel modules have an overall length of 19.54 ft (5.955 m) and each consists of
six transverse deck units attached at 24 hinge points to two longitudinal parallel
panels.
2.3.3.2
For transportation, the two parallel panels are rotated about the hinge points and
stored underneath the deck units to form a compact transportation package. The
modules are deployed by attaching the module lifting beam to the opening slings and
lifting vertically upwards. Similarly, the modules are folded by lifting with the closing
slings. Three curbs are hinged on each side of the module and are lifted and dropped
into position during bridge deployment. Each center curb houses a bridge marker
flag, which is raised into the vertical position for traffic guidance after bridge
deployment.
2.3.3.3
When in the folded condition, the modules are 8 ft (2.447 m) wide (over the nibs) and
14 ft (4.302 m) wide when deployed, but without the three curbs deployed. The
compression faces of the parallel panels incorporate a dowel and shootbolt
arrangement along with a jaw configuration, which is common to both ends of the
caps, these are used to indicate that the bolts are correctly fastened.
Figure 2. 21 Parallel Module
