MIL-HDBK-1025/5
Design live loading shall be 25 psf. However, on fuel docks
b)
or loading docks, a higher live loading, depending on the anticipated usage,
is required. Under full live load plus dead load, the flotation elements
should not be submerged more than 75 percent of their volume.
When concentrated live loads on headers exceed the design live
c)
load, design shall be such as to distribute such loads over a number of
nearby, attached fingers and a considerable length of the header itself.
The deck system and all interfloat stringers shall be designed
d)
for 50 psf.
Deck loading shall be such that a concentrated load of 500
e)
pounds can be placed anywhere on the deck surface without overstressing the
framing members and without tilting the deck more than six degrees from the
horizontal.
For boats with a low rub strake, the stringer shall be wide
f)
enough to extend down to within 8 in. (244 mm) of the water surface under dead
load only.
For boats with high gunwales, provide low level floating
g)
fingers with vertical fender posts that extend upward from each side a few
feet above deck level at intervals of about 8 ft (2.4 m).
Typical Construction.
Figure 12 represents a typical floating-pier
2.3.4.6
system.
Lateral Loading
2.3.5
Loading. Maximum lateral loading of a fixed- or floating-pier
2.3.5.1
system is usually produced by strong winds blowing against the structure and
berthed craft. Such loading usually exceeds normal docking impact loads or
current drag. The design lateral load is based on a given wind velocity
acting on the above water profile of the system and craft. This loading
(velocity pressure in pounds per square foot) for wind velocities up to 104
knots is shown in Figure 13. The wind velocities are for steady-state
conditions, neglecting gusts. For wind velocities at various geographical
locations, see NAVFAC DM-26.6, Mooring Design Physical and Empirical Data.
Analysis
2.3.5.2
Check both parallel and perpendicular directions to the main
a)
walk.
Determine average profile height for berthing craft. (See
b)
It is often taken as 15 percent of the slip length in open
Figure 14.)
berths.
In computing the parallel windload on a line of boats, assume
c)
that all shielded craft experience only 20 percent of the windloading that is
applied to the first (unshielded) boat.
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