MIL-HDBK-1025/5
flexibility in accommodating boats of different lengths. Layout F economizes
space and piers. Layout G permits no dry access to land and poses difficulty
in leaving mooring if outer boats are not manned.
Layouts G and H are not recommended unless special situations
c)
and basin conditions warrant.
Access to a star-shaped-cluster moorage is either by shore-
d)
boat or by a star-to-shore extension of one of the fingers.
Slip and Berthing Arrangements.
2.3.1.5
Features include the following:
In a boat slip, the craft may be tied away from the dock
a)
structure, usually with fore-and-aft ties on both ends. In a single-boat
slip, the craft shall be flanked on each side by a finger pier. In a double-
boat slip, a tie pile centered between the finger ends, three-point ties,
steel whips or any cooperative switch-tie system is expedient.
Small boats in relatively quiet waters shall be berthed to a
b)
dock with stern hooks or bow clamps.
The most common slip arrangement comprises a series of piers
c)
or head walks extending perpendicular to the bulkhead to a pierhead line, with
finger piers extending at right angles from the head walk on either side.
The average head walk width is about 8 ft (2.4 m) with a range
d)
of about 5 to 16 ft (1.5 - 4.9 m). For wider head walks, provide some width
for bearing-pile risers, locker boxes, firefighting equipment, and utility
lines. For narrower head walks, it is preferable to locate all obstructions
to knees at the junctions of finger piers. Extra wide head walks shall
generally be used in fixed-pier installations.
Boarding fingers for single-boat slips shall be about 3 ft
e)
(.91 m) wide. Floating fingers longer than 35 ft (10.7 m) are usually 4 ft
(1.2 m) wide. In double-boat slip construction, use a finger width of 4 ft
for all slip lengths.
Dimensional Criteria and Typical Details
2.3.1.6
See Figure 4 for a typical double berthing arrangement that
a)
has been used successfully.
Figure 5 illustrates single- and double-boat slips, angular
b)
moorage, applicable fairway widths, and the use of stern hooks and bow
clamps.
Figure 6 is a graphical representation of average beam width
c)
and maximum depth of keels for various craft lengths, and suggested widths for
right-angle slips where the actual dimensions of berthing craft are not known.
For typical details, refer to MIL-HDBK-1025/l.
d)
12
Previous Page
