UFC 4-159-03
3 October 2005
CHAPTER 6
FACILITY MOORING EQUIPMENT GUIDELINES
INTRODUCTION. Equipment most often used in mooring facilities is
6-1
discussed in this section.
KEY MOORING COMPONENTS. A mooring is a structure that holds a
6-2
ship in a position using tension and compression members. The resulting mooring loads
are transferred to the earth via anchors or some other members, such as pier piles or a
wharf structure.
Tension Members. The most commonly used tension members in
6-2.1
moorings are:
Chain
Synthetic line
Wire rope
Tension bar buoys
Compression Members. The most commonly used compression
6-2.2
members in moorings are:
Marine fenders
Fender Piles
Camels
Mooring dolphins
Piers
Wharves
ANCHORS. Anchors are structures used to transmit mooring loads to the
6-3
earth. Anchors operate on the basis of soil structure interaction, so their behavior can
be complex. Fortunately, the U.S. Navy has extensive experience with full-scale testing
of a number of different anchor types in a wide variety of soils and conditions (NCEL
Handbook for Marine Geotechnical Engineering). This experience provides a strong
basis for design. However, due to the complex nature of structure/soil interaction, it is
strongly recommended that anchors always be pull tested to their design load during
installation. Design and illustration of some of the common anchor types routinely used
are discussed in Chapter 5 of this UFC, and in NCEL Handbook for Marine
Geotechnical Engineering.
A brief summary of some anchor experience is given in Table 6-1.
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