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stowed and handled by the ship. Sternport ramps are hinged to the vessel and
extend to dockside or floating equipment (lighters, causeways, stages). These ships
also have conventional cargo gear.
The LHA-class of amphibious assault ships has vertical lift stern gates, possess
RO/RO capability. Installations accommodating vessels of this type should consider
the use of a ramp or transfer bridge, as shown on Figure 7-3, to minimize the time
required for movement of vehicular equipment and for loading of supplies. Design
and construction of ramps should be similar to highway bridges. One key issue
regarding ramps is clearance from pier/wharf edge obstructions, i.e. utility risers,
cleats, bollards, etc. When designing piers and wharves, consider the specific
location for ramp landing as well as structural deck strength.
As discussed previously in Chapter 2, sideport loading ramp access for LHA, LHD,
and LPD-17 class ships is an important consideration, particularly on double deck
ACCESS LADDERS AND LIFE RINGS.
Provide ladder access from pier or wharf deck to waters at a maximum spacing of
400 ft (121.9 m) on centers or within 200 ft (61 m) of the work area per 29 CFR
1917.26. Such ladders should be at least 1 ft 4 in (0.38 m) wide and should reach
the lowest water elevation anticipated. Safety cages are not required. Locate the
ladder on either side for a pier (50 ft [15.2 m] or more wide) and on the waterside for
a wharf at places convenient to anyone who might accidentally fall into the water.
Also, 29 CFR 1917.26 requires that a U.S. Coast Guard-approved 30 in (762 mm)
life ring with at least 90 ft (27.4 m) of line attached be available at readily accessible
points at each waterside work area where the employee's work exposes them to the
hazard of drowning. Interpret as one life ring per wharf.