TM 5-5420-203-14
c. Launching in Wetlands or Marshy Areas - CONT
NOTE
The maximum usable span of the bridge is 60 ft. This takes into account the overall length
of the bridge (63 ft with a minimum of 1-1/2 ft overhang on each bank if bank conditions
permit and abutments are present. If a suitable firm bank is not present, then a minimum of
3 ft overhang on each bank is required, reducing the overall usable span to 57 ft).
(2) After the above considerations have been made, prepare the site. Contact engineers (if
required) for site preparation. The illustration below shows a properly prepared launching
site.
WARNING
If the bridge tilts to the extent
that the launcher turns over,
immediately abandon the launcher
and move injured personnel to a
safe area.
(3) If an attempt to launch on an
uphill or downhill grade or a side
slope has resulted in other than a
normal launch position (launcher
and bridge appear to tilt more
than allowed due to soft footing,
slippage, etc.) immediately stop
operations.
(4) If bridge is past highest vertical
position and is on its way down,
make a decision whether to
continue the launching operation.
If bridge has not reached its
highest point, stop the current
operation and return the bridge
either to the ground or the bridge
seat on the launcher.
(5) Do not, at any time, continue an
operation if any chance exists of
the launcher turning over or if
there is evidence of continued
tilting, slippage, or other
hazardous actions.
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