112 



WATER CONDUCTORS AND ACCESSORIES 



usually much higher than that of a wooden flume, its life is so 

 much longer and the maintenance cost so much lower, that it may 

 prove more economical in the long run. There is further one 

 advantage of such flumes and that is the omission of crosspieces 

 over the top, which makes cleaning very easy. This point should 

 be carefully considered for waters which are prolific in moss and 

 vegetable matters. 



Steel flumes are generally semicircular in cross-section, similar 

 to Fig. 57. There are several makes of such flumes but their 



2"x 12"Planks 



These Braces added 

 where Heights exceed 16 



FIG. 57. Semi-Circular Wood-Stave Flume. 



Clinton Wire Mesh 



6" xG" Spacing 

 No.6 & No.6 Wires 



FIG. 58. Concrete Flume. 



Web under 

 bottom about 14" 

 joints 



4"Sq. Eeinf-Rod 



construction does not differ materially. They consist of curved 

 metal sheets with a bead or corrugated groove rolled in each edge 

 of the sheet. The sheets are put together by means of an inter- 

 locking joint formed by overlapping the edges, which fit over 

 each other. The joint is made tight by means of a curved rod 

 which fits on the outside of the corrugated groove and a curved 

 beveled bar or small channel on the inside. The steel rods carry 

 the weight of the flume, and their ends are threaded for nuts 

 and pass through a carrier or tie-beam which is supported on 

 stringers about 16 feet long. 



