TM-5-5420-279-10
Section II. BRIDGING MODULES
2.3 BRIDGING MODULES
Ramp Modules
2.3.1.1
Two ramp modules and end beams, five parallel modules and 20 approach ramps are
pinned and shootbolted together to form a 40m bridge span. Two extra ramp
modules, two end beams and 20 approach ramps are located on additional flatracks
to deploy two 20 m bridges instead of one 40 m bridge if required.
2.3.1.2
The ramp modules have an overall length of 19.58 ft (5968 m) and each consists of
six transverse deck units attached at 24 hinge points to two longitudinal ramp panels.
POSITION
1
POSITION
CLOSING
2
SLINGS
END BEAM
DECK UNITS
LOCATION
(6 OFF)
HINGE POINTS
(24 OFF)
OPENING
RAMP PANEL
SLINGS
COMPRESSION
FACE
DOWEL
DAMPER
IDENTIFICATION
RAMP PANEL
(4 OFF)
PLATE
SOCKET
RESILIENT MOUNTING
CURB PLATE AND
BRIDGE MARKER FLAGS
PIN JAWS
SHOOTBOLT
BIRDS BEAK
WF/0040
Figure 2. 19 Ramp Module
2.3.1.3
For transportation, the two ramp panels are rotated about the hinge points and stored
underneath the deck units to form a compact transportation package. The ramp
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. A further set of lifting points are incorporated in the ramp module, these are
used to attach the home bank carriage lifting slings to the completed bridge structure.
2.3.1.4
Two curbs are hinged on each side of the module and are lifted and dropped into
position during bridge deployment. One curb houses a bridge marker flag, which is
raised into the vertical position for traffic guidance after bridge deployment.
