107 Food and Agriculture Organization（107年粮食和农业组织）.pdf

107 8. Quays and slipways SUMMARY For the purpose of this chapter, a quay is a general term used to describe a marine structure for the mooring or tying-up of vessels, and for loading and unloading of goods and passengers. It is generally contiguous with the shore. A pier or finger jetty is a quay that projects into the water. In contrast to a normal quay, a finger jetty may be used on both sides. In areas with a high tidal range, both quays and jetties are often of the floating type. The traditional slipway in many small beach-side communities is still the natural beach where boats are hauled ashore for scrubbing, cleaning and repair. However, a beach is not always suitable or available for servicing a vessel, especially vessels larger than small canoes. On the other hand, inside fishing harbours, the recent technological advances in boat hoists has further widened the range of options available to a would-be designer of slipways. This chapter reviews the cross-sections of a wide variety of quays and jetties to suit an even wider range of applications. The objective being that the reader will be able to appreciate the different applications of past and more recent technologies and be better prepared to assess the potential requirements for berthing and boat maintenance structures. 108 Fishing harbour planning construction and management COnTEnTS 8.1 Quays 109