DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
Field Procedure for Placing Drain Holes and Repair
Welding Cracks in the Bow Ponton Extrusion,
RIBBON BRIDGE INTERIOR BAY
Headquarters, Department of the Army, Washington, D. C.
3 June 1983
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help to improve this manual. If you find any mistake or if you know of a way
to improve the procedures, please let us know. Mail your letter or DA Form 2028
(Recommended Changes to Publications and Blank Forms) direct to: Commander, US
Army Troop Support and Aviation Materiel Readiness Command, ATTN: DRSTS-
MPSD, 4300 Goodfellow Blvd., St. Louis, MO 63120. A reply will be furnished directly
to you.
Page
Paragraph
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE PROCEDURES
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .
3
2
Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
Measuring, Marking, and Hole Drilling Procedure . . . . . . .
3
4
Repair Welding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. General. This bulletin provides instruction for inspecting, placing drain holes, and repair welding
the ribbon bridge interior bay ponton deck extrusion.
2. Inspection. Inspect the interior bay bow ponton extrusion. This defect appears as a ripple or
discontinuity in the top skin of the extrusion. Visually examine all of these areas for cracks. Clearly
mark any crack noted in order that it can be repaired.
1. Tools Required. The following measuring and marking items and tools are required:
a. Three foot min straight edge or yardstick
b. Scale or tape measure
c. Pincil or Scriber
d. Center punch
e. Chalk line (optional to Item a)
f. Electric Drill Gun with 3/8 dia drill
g. File