Figure 10-11. - Assembly plates.
NOTE: As of this printing LSTs are being pontoon structure on an LST is attached to the decommissioned and it is undecided what platform will transport causeways. The information on LSTs is given because the Reserve Fleet will retain two and the next platform used could require the same hardware for loading and launching.
AP4A TIE PLATE: The AP4A is a steel plate with two drilled holes for A6B bolts. It is used for connecting pontoon strings to each other at their bow and stem ends. If necessary, an acceptable substitute for the AP4A can be obtained by cutting an API connecting plate in half across the narrower dimension; two plates are produced, both of which can be used.
LA2 LAUNCHING ANGLE END PLATE: The LA1 launching angle used when side-loading a structure at the bow and stem ends with a two-hole assembly plate, just as pontoon strings are connecteed within the structure by the two-holed AP4A at the bow and stem. The two driIled holes in the LA2 are for A6B bolts. Two half-ovals are welded perpendicularly to the upper face of the plate, on either side of the bolt holes. These half+oval lugs serve as fenders to protect the hull of the LST in the same way as the pad on the AP3.
AP5 END PLATE: The AP5 is a steel plate that is welded across the gap between pontoons at the bow and stem of adjacent strings. It is used only in certain special cases where structures require extra reinforcement; for example, where end connectors are used or where the structure will be side-launched. AnContinue Reading