d. End Span Anchorage. To avoid longitudinal movement of ribbon bridge, install suitable end span anchorage.
Transporters parked at each end can provide adequate anchorage for short periods. The transporters should be replaced
by fixed shore guys if H bridge is to remain for extended periods of time. Refer to TM 5-210, for methods of installing fixed
anchorage. Position four transporters at each end of the bridge with front winches used for shore guys. See figure 2-25
for transporter positioning. Engage parking brake, chock wheels, and engage front winch PTO. Pay out cable to attach
bow lifting and anchoring pins and take up slack in cable.
Figure 2-25. Transporter End Span Anchorage.
2-24. Bridge Operation.
a. General. The ribbon bridge, is a floating bridge which has a Class 70 normal crossing capability in currents Up
to 8 fps.
b. Traffic. The capacities of the floating bridge at various stream velocities are found in table 2-16. Vehicles may
travel anywhere on the roadway in normal crossings at reasonable speeds. In caution crossings, the vehicle is restricted
to centerline of the bridge and to speeds up to 8 mph (12.87 kilometers per hour). A 150 ft (45.72 m) tail-to-head spacing
is required for caution crossings, while a 100 ft (30.48 m) spacing is required for normal crossings. Risk crossings require
the following; the vehicle must be on the roadway centerline; it must travel at less than 3 mph (4.83 kilometers per hour);
only one vehicle on the bridge at a time.
Stopping, accelerating, turning, and shifting of gears on the bridge is not permitted during caution or risk
crossings and should be kept at a minimum during normal crossings.