HYDRAULIC DREDGES FOR CHANNELS 



121 



at the bilges, but it is rectangular in plan with rounded ends in side 

 view. There is a central opening, or well, through which the suction 

 pipe works. This well is 8 ft. wide except at the forward end, where 

 it is 10 ft. wide to admit the cutter, and it is of sufficient length to 

 receive the pipe. The suction pipe is formed of a rectangular steel 

 box girder of great strength, and having its lower horizontal web 

 extended in width so as to fit between the sides of the well. The 

 flanges of this horizontal girder are formed of two angle irons 5XoXj 

 in. covered with a plate 12 Xi in., which bear against the sides of the 



FIG. 35. Plan and Longitudinal Section of the Dredge " J. Israel Tarte." 



well. This is for the purpose of withstanding the great lateral strain 

 due to feeding the dredge sideways and with the cutter in contact 

 with the bottom. The suction pipe is hinged to the hull at the 

 deck by means of massive steel hinged castings, and a steel bulkhead 

 extends the entire width of the hull at this point. The sides of the 

 hull are extended above the deck to form a solid steel bulwark 

 entirely around the dredge, the hand-rail being formed of an 8-in. 

 bulb angle finished on the outside with 2 in. half round. These 

 bulwarks form a protection against the seas which sometimes break 

 over the dredge. 



