12 December 2001
Berths and Berthing Basins. Figure 5-15 showed types of berth
arrangements. Table 5-10 lists factors affecting the selection of the location of berthing
basins. A rule of thumb is that the wave height in the berthing basin should not exceed
0.6 m (2 ft) for comfortable berthing, but in no case shall the wave height exceed 1.2 m
Quayage Required. Quayage requirements of piers and wharves for the
various classes of vessel may be estimated from tabulated data in MIL-HDB-1025/1.
Consult with the using agency for data on the maximum number of ships of various
classes (including lighters) to be simultaneously accommodated.
5-188.8.131.52 Arrangement of Berths.
Selection. The arrangement of berths must fit the proposed site without
encroaching on pierhead or bulkhead lines. For steeply sloping
subgrades, the berths must fit within the depth contour below which the
driving of piles is impractical. In selecting the berthing arrangement,
consider the factors relating to economics and utility (see Table 5-11).
Relative Berthing Capacities. Table 5-12 shows linear feet of berthing
space per 304.8 m (1,000 ft) of shorefront.
Size and Depth of Basin and Berths. For the general depth
requirements for the basin, see paragraph 5-6.1.2.
Berthing Area. For berthing-area requirements for piers, see Table 5-13.
For ships berthed at marginal wharves or quay walls, provide twice the
total area requirement shown in Table 5-13 for pier berthing. Allow
additional area within the harbor limits for channels, special berths, turning
basins, and other facilities.
Depth. Except where heavy silting conditions require greater depth at
individual berths at low water, the depth should equal the maximum
navigational draft of the largest vessel to be accommodated plus 10
percent. On mud or silt bottoms, consider increasing depth requirements
if investigation indicates probable fouling of condensers on the vessel due
to the proximity of the mudline to intake pipes of the condenser system.
Where vessels to be accommodated are not specifically known, the
values in Table 5-14 may be used.
Clear Width of Slips Between Piers; see MIL-HDB-1025/1.
Length of Berth; see MIL-HDB-1025/1.
Width of Piers.