ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1FIGURE 1-8. Launching Double Story Bridges up to 102ft (31.1m)(1)BOTTOM PANEL. Forms a second, deeper girder that is used on double story and link reinforced MGB. Bottompanels connect to top panels and junction panels by shootbolts and panel pins, using a guide system to align thepanels to enable the panel pins to be inserted.(2)JUNCTION PANEL. Used in double story bridges to connect the sloping end of bridge o the level roadway ofbridge.(3)END TAPER PANEL. Forms a brace between the unction panel and bankseat beam. It provides most of thebearing surface needed for support of the bridge.(4)SWAY BRACE. Used as a cross member between bottom panels in girders of double story bridges.(5)FRONT AND REAR ROLLER BEAM ASSEMBLY. Always the bridge to be boomed (moved) during assembly ordisassembly using rollers, which can be locked. The roller beam is placed on adjustable supports and baseplateswhich are connected by a frame cross girder. The beam can be raised or lowered using jacks.(6)PUSH BAR, PUSH BAR ADAPTER AND PUSH BAR CROSS GIRDER. Used when a vehicle is needed to movethe bridge. The push bar cross girder is used to connect the push bar to an unfinished bridge. The push baradapter connects the push bar to the bumper of the truck. Long or shod push bars can be used, depending on thelength and type of bridge.(7)HYDRAULIC JACK. The 15 ton jack is used in the adjustable supports and the landing roller pedestal Mk 1. The20 ton jack is used in the landing roller pedestal Mk 2. Jacks a also used with a jack support connected to thebankseat beam to raise and lower all types of MGB.1-87
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