TM 5-5420-278-10
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LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Contd)
RAMP BAY EQUIPMENT FEATURES
For the location and a brief description of the major components of the IRB-R and
IRB-I, locate the desired component by matching its description callout with the
corresponding illustration callout on the opposite page.
OUTER PONTON – A non-compartmentalized structure that functions as a
float to support loads placed on its top (walkway) surface, and provides
additional buoyancy to the inner ponton. The outer ponton contains a stowage
compartment for equipment and tools. Left and right outer pontons are not
interchangeable.
STOWAGE COMPARTMENT – A compartment in each outer ponton (ramp
bay only) between the walkway and splash plate for holding the Basic Issue
Items (BII) necessary for IRB operation. The following items and BII items
can be stowed on each ramp bay:
(1)
Two ropes for securing bay
(2)
Two hand levers for operation of pumps
(3)
IRB hoisting gear (lifting sling) for high-bank launch
(4)
Spare Chem-lite tubes
(5)
Roadway tool for closing gap between inner-to-inner pontons
(6)
Crowbar for use with roadway tool
(7)
19-mm wrench for removing ponton drain plugs
(8)
Coupling device for bay-to-bay connection
RAMP PLATES – The two plates mounted on the outer pontons used to
increase the width of the roadway approach ramp.
ROADWAY – The top road surface of two adjoining inner pontons having a
13 ft 5 in. (4.1 m) wide load bearing area for vehicles and cargo.
INNER PONTON – A non-compartmentalized structure that functions as a
float to support loads placed on its top (roadway) surface. The inner ponton
contains a pump and cylinder. Left and right inner pontons are not
interchangeable.
WALKWAY – The 4 ft 3 in. (1.3 m) wide top surface of the outer ponton for
personnel crossing.
HANDRAIL – A retractable railing, extending the full length of the bay,
consisting of two stanchions and a cable mounted on each outer ponton splash
plate.
G
F
E
D
C
B
A
