TM 5-5420-234-14&P
5-5.
BAP GENERAL WELDING MAINTENANCE (continued).
c.
BAP Winch Frame Structure.
(1)
Hook Bar to Plates. These welds join hook bar to plates. Sound welds in these bar joints are necessary
to ensure safe handling of bridge bays and loaded BAP. A crack should be repaired before it reaches
1.0 inch (25.4 mm) in length. The combined length of multiple cracks at one of the joints should not
exceed 1.5 inches (38.1 mm).
(2)
Bottom Lock Beam to Side Tubes. These welds join the bottom lock beam assembly to side tubes.
Sound welds in these joints are necessary to ensure safe handling of bridge bays and loaded BAP. A
crack should be repaired before it reaches 1.0 inch (25.4 mm) in length. The combined length of
multiple cracks at one of the joints should not exceed 2.0 inches (50.8 mm).
(3)
Bottom Lock Support and Guide Plates to Beam. These welds join the eight bottom lock support and
guide plates to the beam. Sound welds in these joints are necessary to ensure safe handling of bridge
bays and loaded BAP. A crack should be repaired before it reaches 1.0 inch (25.4 mm) in length. The
combined length of multiple cracks at any one plate joint should not exceed 2.0 inches (50.8 mm).
(4)
Bottom Locking Tabs to Pins. These welds join locking tabs to bottom lockpins. Sound welds are
necessary to ensure safe handling of bridge bays and loaded BAP. A crack should be repaired before it
reaches 0.25 inch (6.4 mm) in length. The combined length of multiple cracks at any one tab joint
should not exceed 0.5 inch (12.7 mm).
(5)
Winch Mounting Plate to Support Plate. These welds join the winch mounting plate to support plate
coming from winch frame side tubes. Sound welds in these joints are necessary to ensure safe handling
of bridge bays. A crack should be repaired before it reaches 1.0 inch (25.4 mm) in length. The
combined length of multiple cracks in this joint should not exceed 2.0 inches (50.8 mm).
(6)
Sheave Housing Side Plates to Cap Plate. These welds join sheave housing side plates to top cap plate.
Sound welds in cap plate joints are necessary to ensure safe handling of bridge bays. A crack should be
repaired before it reaches 1.0 inch (25.4 mm) in length. The combined length of multiple cracks in cap
plate joints should not exceed 2.0 inches (50.8 mm).
(7)
Sheave Housing Outside Gusset Plates to Base Plate. These welds join outside gusset plates to sheave
housing base plate. Sound welds in these joints are necessary to ensure safe handling of bridge bays. A
crack should be repaired before it reaches 1.0 inch (25.4 mm) in length. The combined length of
multiple cracks in any one gusset plate joint should not exceed 2.0 inches (50.8 mm).
(8)
Sheave Housing Hook Housing Saddle Plates and Supports. These welds join winch rope hook
housing saddle stop plates and support bars to sheave housing side plates. Sound welds in these joints
are necessary to ensure safe handling of bridge bays. A crack should be repaired before it reaches 1.0
inch (25.4 mm) in length. The combined length of multiple cracks should not exceed 1.5 inches (38.1
mm).
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