TM 5-5420-278-24&P
0081 00
0081 00-1
SHIPMENT AND LIMITED STORAGE
IMPROVED RIBBON BRIDGE (IRB)
RAMP BAY M16
NSN 5420-01-470-5825 P/N 12478918;
INTERIOR BAY M17
NSN 5420-01-470-5824 P/N 12478919.
LIMITED STORAGE
SCOPE
Commanders are responsible for ensuring that all IRB bays issued or assigned to their command are
maintained in a serviceable condition and properly cared for, and that personnel under their command
comply with technical instructions. Lack of time, trained personnel, or proper tools may result in a unit
being incapable of performing maintenance for which it is responsible. In such cases, unit commanders
may, with the approval of major commanders, place an IRB-R or IRB-I that is beyond the maintenance
capability of the unit in administrative storage. For detailed information, refer to AR 750-1.
LIMITED STORAGE INSTRUCTIONS
NOTE
Ensure each bay is drained prior to removal from storage. Water
may accumulate from condensation inside bay pontons.
a. Time Limitations. Administrative storage is restricted to a period of 90 days and must not be
extended unless the IRB bay(s) is reprocessed per b below.
b. Storage Procedure. Perform disassembly only as required to clean and preserve exposed surfaces.
Except as otherwise noted, and to the maximum extent consistent with safe storage, place the bay(s) in
administrative storage in as nearly a completely assembled condition as practicable. Install and adjust
equipment so that the bay(s) may be placed in service and operated with minimum delay.
(1) The IRB-R or IRB-I should be stored on level ground in the most favorable location available,
preferably one which affords protection from exposure to the elements and from pilferage. The IRB bays
shall withstand indefinite storage in any ambient temperature in the range of -50º F (-45.6º C) to
160º F (71.1º C).
(2) This maintenance consists of inspecting, cleaning, servicing, preserving, lubricating, adjusting,
and replacing mandatory repair parts as required.
(3) Provide access to the bay(s) to permit inspection, servicing, and subsequent removal from
storage.
INSPECTION IN LIMITED STORAGE
NOTE
Ensure each bay is drained prior to removal from storage. Water
may accumulate from condensation inside bay pontons.
a. Conduct visual inspection of IRB bay(s) in limited storage at least once a month and immediately
following hard rains, heavy snowstorms, windstorms, or other severe weather conditions. Perform
disassembly as required to fully ascertain the extent of any discovered deterioration or damage. Maintain
a record of these inspections for each bay. Attach record to bay so that it is protected from the weather.
