28 July 2005
For wharves or piers with berths on one side, the minimum width is 66 ft (18.3m)
comprised of: 16 ft (4.9m) bollards and utilities, 35 ft (10.7m) mobile crane ops,
and 15 ft (4.5m) fire lane). For CVN's with berth on one side, the minimum width
is 90 ft minimum (27.4m) comprised of: 20 ft (6.1m) bollards and utilities, 35 ft
(10.7m) mobile crane ops, 15 ft (4.5m) fire lane, and 20 ft (6.1m) for loading area.
Berths on Both Sides.
For Single Deck pier with berths on both sides, the minimum width is 117 ft.
(35.7m) comprised of: 32 ft (9.8m) bollards and utilities, 70 ft (21.3m) mobile
crane ops/loading area, and 15 ft (4.6m) fire lane). A typical single deck pier is
shown in Figure 2-5. For a single deck pier with CVNs (or combination
CVN/AOE) berthed on both sides, the minimum width is 150 ft (45.7m)
comprised of: 40 ft (12.2m) bollards and utilities; 70 ft (21.3m) mobile crane ops;
25 ft (7.62m) loading area; and 15 ft (4.6m) fire lane. This 150 ft (45.7m)
recommended width is based largely upon operational experience of existing
Double Deck Pier with Berths on Both Sides.
Minimum width is 93-ft (28.3 m) comprised of: 8 ft (2.4 m) bollards, 70 ft (21.3 m)
mobile crane ops/loading area, and 15 ft (4.6 m) fire lane). A double deck pier
provides: clear unobstructed pier to ship interface; isolation of operations deck
services from lower deck utilities services (i.e. substation located on lower deck);
reduced offset requirements for mobile crane operation (thereby reducing the
requirement for floating cranes); higher main deck, improving mooring line angles
and lessening need for brow platforms; A typical double deck pier is shown in
Mobile Crane Operation.
With the exception of magnetic treatment/electromagnetic roll and fueling piers
where a lighter duty mobile crane and/or forklift truck is sufficient, piers and
wharves are subject to frequent usage by mobile cranes, forklifts, and straddle
carriers. Typically, the cranes will be used to lift light loads (5 to 10 tons) but at a
longer reach. This requires a high-capacity crane. If the crane operations are
not allowable because of utility trenches and trenches with light-duty covers,
such areas should be clearly marked and separated by a raised curb to prevent
accidental usage. Typically, mobile crane operators want to get as close as
possible to the edge of the pier or wharf to reduce the reach. However, the
edges of piers and wharves are also the best places for locating utility trenches
and utility trenches. This conflict can be resolved by either designing all utility
covers to the high concentrated load from the mobile crane or by allowing crane
operations in discrete and dedicated spaces along the edges. Weight-handling
equipment requires maneuvering and turnaround space on the deck for effective
operation. If possible the deck space should be planned to allow mobile cranes
to be backed up perpendicular to the bullrail. This permits the maximum