TM 55-1930-209-14&P-13
CHAPTER 2 BRIDGE CRANE SYSTEM
Section I. Description and data
2-1
Description. The bridge crane system, in the ROWPU space, lifts and transports heavy equipment and
materials, such as diesel generators and 55-gallon drums. The bridge crane is also used for loading and unloading
equipment and materials through the deckhouse starboard sliding door. Bridge crane major components (Figure 2-1)
include: two 5-ton capacity, motor-driven, overhead cranes with end truck assemblies; a manual, chain-operated, geared
trolley hoist; a cable reel located midway on each ROWPU system; and an "I" beam rail system. The "I" beam rail
system, over which the cranes move, is suspended from the deckhouse structure by a series of support posts. Two
crossover members located between the port and starboard bridge cranes provide for transfer of the geared trolley hoist.
A four-button, hand-held electrical control is used for controlling fore and aft crane movement. Electric power is provided
to the crane through a cable that is extended or retracted by the cable reel as the crane moves forward or aft.
Additionally, a 2-ton electric hoist provides for lifting lighter loads. A jib rail provides a method for moving suspended
loads through the barge sliding door. Figure 2-2 provides a top-down view of the various equipment transport paths. The
bridge crane system installation is shown on drawings listed in Appendix A.
2-2
Capabilities. The bridge crane lifts and transports loads of up to 5 tons with the geared trolley hoist. Loads of 2
tons or less are lifted with the electric hoist when installed on the trolley hoist.
2-3
Limitations. Load limitations are set at loads of 5 tons or less for the bridge crane and 2 tons or less with the
electric hoist. Lifting slings, listed in paragraph 2-8.1, must be used to lift and transport such items as 155 kW
generators, ship auxiliary generator (SAG), ROWPU high-pressure (HP) pumps, media filters, and 55-gallon drums.
2-4
Performance characteristics. See manufacturers' service manuals in Appendix B.
2-5
Equipment specifications.
a. Geared trolley hoist
Manufacturer
Monogram Industries, Inc.
Chester Hoist Division
CAGEC
80735
Part no.
1422-5
Type
Low headroom with track
Capacity
5 tons (10,000 lb)
Quantity
1
b. Cable reel
Manufacturer
Aero-Motive Manufacturing Co.
CAGEC
82366
Part no.
0931-06-204
Type
Roller outlet w/40 ft of 4 conductor #14 wire
Quantity
2
c. Jib
Manufacturer
Spanmaster
Division of Jervis B. Webb Co.
CAGEC
5N204
Part no.
NS-83-92580-A4
Type
Swinging w/hinge assemblies and tie rod
Length
9 ft 2 in.
Material
Steel
Quantity
1
2-1
