TM 5-5420-278-100003 000003 00-8LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Contd)RAMP BAY EQUIPMENT FEATURESFor the location and a brief description of the major components of the IRB-R andIRB-I, locate the desired component by matching its description callout with thecorresponding illustration callout on the opposite page.OUTER PONTON – A non-compartmentalized structure that functions as afloat to support loads placed on its top (walkway) surface, and providesadditional buoyancy to the inner ponton. The outer ponton contains a stowagecompartment for equipment and tools. Left and right outer pontons are notinterchangeable.STOWAGE COMPARTMENT – A compartment in each outer ponton (rampbay only) between the walkway and splash plate for holding the Basic IssueItems (BII) necessary for IRB operation. The following items and BII itemscan 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 connectionRAMP PLATES – The two plates mounted on the outer pontons used toincrease the width of the roadway approach ramp.ROADWAY – The top road surface of two adjoining inner pontons having a13 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 pontoncontains a pump and cylinder. Left and right inner pontons are notinterchangeable.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 splashplate.GFEDCBA
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