ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
It Is very Important that front roller beam be correctly positioned at this time. If It Is not, serious
problems will arise later during construction. These problems range from skewing of the bridge
off of the centerline to possible damaging of the bridge and roller beams.
(10) Connect two longitudinal girders to the front roller beam by locating the dowels in the holes in the roller beam.
Position the RRB roughly at the other end of the longitudinal girders.
(11) Repeat step (10) with the rear roller beam, pulling on baseplates to locate the dowels in the holes. When the
longitudinal girders are located in both roller beams this will final position the roller beams at 900 to the
centerline and centered over centerline. Do not move front roller beam during this operation as it was final
positioned at step (8).
(12) After a final check to ensure that both roller beams are correctly positioned, disconnect the longitudinal
girders from both roller beams, lower the girder at the rear roller beam and place on the ground, then re-
locate the girder in the front roller beam. The girders will remain in this position to assist in the assembly of
the end of bridge (para. 4-8).
(13) Adjust roller beams so that front roller beam is higher than the rear roller beam. Level both roller 4-9 beams
(para. 4-5d.) and lock rollers (para. 4-5e.).