NOTES ON DOCKS AND DOCK CONSTRUCTION. 



area will depend upon the form and width of the dock. A square 

 form, whilst it would give greater facilities for manoeuvring 

 vessels and lessen the distance of removal, would give a less 

 length of available wharfage than a basin of an oblong form of 



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Fio. 2. Water area, 111,111 square yards ; wharfage, 4033-33 feet. With 

 jetties Water area, 88,889 square yards ; wharfage, 54G6'66 feet. 



the same water area. For instance, a dock 1000 feet by 1000 

 feet, equal to an area of 111,111 square yards (Fig. 1), would 

 have (allowing 100 feet for the entrance, and ships of 50 feet 



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H 



FIG. 3. Water area, 111,111 square yards; wharfage, 4700 feet. With 

 jetties Water area, 94,444*34 square yards ; wharfage, 6900 feet. 



beam) an available wharfage of 3700 feet. Whilst a dock of the 

 same water area, but 1500 by 666'66, would have an available 

 wharfage of 4033'33 feet (Fig. 2). If the length is 2000 by 



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JOO. O- -^ c - M< - - 



._i_. 



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Fio. 4. Water area, 111,111 square yards; wharfage, 

 jetties Water area, 91975'30 square yards; wharf 



5044-44 feet. With 

 harfage, 7888'88 feet. 



500 (Fig. 3), the available wharfage becomes 4700 feet; in this 

 case, the available length of wharf at the ends of the dock 

 would be 400 feet. If the dimensions arc made 2222'22 by 450 

 (Fig. 4), the wharfage is 5041'44 feet, with 350 feet available 



