What is the minimum distance in feet between vehicles crossing a ribbon bridge under caution conditions?

Under normal crossing conditions vehicle spaced 100 ft apart, a 110 m IRB has the structural capacity to endure currents up to 9 ft/s; the maximum current for a 210 m IRB is 5 ft/s.

What is IRB in the army?

DESCRIPTION. The Improved Ribbon Bridge (IRB) is used to transport weapon systems, troops and supplies over water when permanent bridges are not available, and thereby supports the joint force commander’s ability to employ and sustain forces worldwide.

What happens if the ribbon bridge roadway bow pontoon bridge latches are not engaged?

If the roadway/bow ponton bridge latches are not engaged, the bow ponton will fold up when a vehicle crosses the bridge.

What is an in stride river crossing?

The purpose of any river crossing is to project combat power across a water obstacle to accomplish a mission. A river crossing is a unique operation. The best method is to cross rivers in stride as a continuation of the tactical operation, whether in the offense or retrograde.

Which point in the crossing area is used to ensure that vehicles do not exceed the capacity of the crossing means during a river crossing operation?

Engineer Regulating Point
Engineer Regulating Point . ERPs are technical checkpoints used to ensure that vehicles do not exceed the capacity of the crossing means. They help maintain traffic flow.

What is IRF in the army?

Rapid Reaction Force. The Immediate Response Force (IRF) is a rapid reaction force jointly maintained by the United States Army and United States Air Force capable of deploying worldwide within 18 hours of notification.

What is the IRB office?

The Institutional Review Board (IRB) is an administrative body established to protect the rights and welfare of human research subjects recruited to participate in research activities conducted under the auspices of the institution with which it is affiliated.

Why do pontoons float?

Pontoon boats have a flat-bottomed hull that relies on long cylindrical tubes, called pontoons, for buoyancy. Pontoon boats float, via their pontoons, due to the principle of flotation that states when an boat displaces an amount of weight in water that is equal to its own weight then the boat will float.