ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/2
FIGURE 1-7 Launching Double Story Bridges up to 108ft (32.9m)
BOTTOM PANEL. Forms a second, deeper girder that is used on double story and link reinforced MGB. Bottom
panels connect to top panels and junction panels by shootbolts and panel pins, using a guide system to align the
panels to enable the panel pins to be inserted.
JUNCTION PANEL. Used in double story bridges to connect the sloping end of bridge to the level roadway of
END TAPER PANEL. Forms a brace between the junction panel and bankseat beam. It provides most of the
bearing surface needed for support of the bridge.
SWAY BRACE. Used as a cross member between bottom panels in girders of double story bridges.
FORWARD AND REAR ROLLER BEAM ASSEMBLY. Allows the bridge to be boomed (moved) during assembly
or disassembly using rollers, which can be locked. The roller beam is placed on adjustable supports and
baseplates which are connected by a frame cross girder. The beam can be raised or lowered using jacks.
PUSH BAR, PUSH BAR ADAPTER AND PUSH BAR CROSS GIRDER. Used when a vehicle is needed to move
the bridge. The push bar cross girder is used to connect the push bar to an unfinished bridge. The push bar
adapter connects the push bar to the bumper of the truck. Long or short push bars can be used, depending on the
length and type of bridge.
HYDRAULIC JACK. The 15 ton jack is used in the adjustable supports and the landing roller pedestal Mk 1. The
20 ton jack is used in the landing roller pedestal Mk 2. Jacks are also used with a jack support connected to the
bankseat beam to raise and lower all types of MGB.