TM 5-5420-203-14
f. Loading/Unloading a Scissored Bridge to/from a Lowbed or Flatbed Semitrailer using a crane
(20 ton capacity or higher) - CONT
(e) Once the lifting hooks are in place at the four side lifting points on bridge, the crane operator
should lift slowly, taking the slack out of the sling lines, plus ensuring that binding of the cable
or hooks.
(f) Proceed to lift and swing the bridge into position onto the semitrailer. A guide line (rope)
should be attached to one comer of the folded bridge so it can be guided by a ground crewman
when positioning and centering the bridge longitudinally on the semitrailer.
(g) Once the bridge is in place, properly secure it to the semitrailer as specified in paragraphs 2-
l0b(l)(o) or 2-10c(l)(p) as appropriate.
(2) Unloading. This procedure is the reverse of the loading operation
WARNING
Prior to releasing and removing the tie down chains from the bridge/trailer, the crane should
be in position with the 4 legged sling attached to the folded bridge along the lower half at the
four side lift points of the bridge to prevent the bridge from slipping or shifting its position.
When releasing the tiedown chain binders use extreme caution to avoid binder handle
backlash which may likely occur.
(a) Position the crane on center and between the semitrailer with bridge, and the area on the
ground where it is desired to place the folded bridge for the off-loading operation.
(b) Attach guide line (rope) to one corner of the bridge so it can be swung or rotated into position
as desired on the ground.
(c) Attach the lifting hooks from the sling to the appropriate four side lift points along the
outboard lower half of the bridge. Chain the bridge's tie-rods together before lifting the bridge
Begin the lift by slowly taking up the slack and checking for any binding of sling.
(d) Continue the lifting of the bridge so that it clears the bed of the trailer, move the trailer out
from under the bridge, and swing the bridge to its intended position on the ground. Orient the
bridge by use of the attached guide line and lower it in place, setting it down on prepositioned
wooden blocks keeping the bridge approximately 4 inches off the ground.
(e) Detach the sling and guide line and stow with the other BII on the launcher.
Change 2 2-111
