DESIGN AND CONSTRUCTION OF STANCHIONS 

 (FIGURES 2A THROUGH 2C] 



20' X 2" ID PIPE TELESCOPED 

 5' INTO 2V 2 " ID PIPE 



15* X V/ 2 " ID PIPE 



THREADED HERE ONLY 



BASE PIPE 



120° 



6" FINS WELDED 

 1/8" PLATE 



1/8" HOLE UNDER 

 EACH FIN 



5/8" HOLE FOR 

 NOZZLE EFFECT 



Figure 2(A). The base pipe section of each stan- 

 chion is designed to facilitate insertion into the 

 s ed intent s as well as to withstand the horizontal 

 strain of wave surge. Three vertical fins, welded 

 to the pipe at intervals of 120°, add to the hori- 

 zontal stability of the installation. The tapered 

 nozzle has holes strategically placed to best uti- 

 lize the effect of the high-pressure water during 

 the jetting operation. The upper end is threaded 

 for coupling to the water hose. 



