Figure 9. Tire mooring damper (six tires are used in the 

 MS-1 mooring system discussed in Sec. 111,2). 



2. Construction Procedures . 



The floating tire breakwater is a modular construction concept. The pro- 

 cedures followed in the actual construction of the PT-1 modules are described 

 in this section. The procedures used for the PT-2 modules are very similar 

 and therefore are not covered. When constructing these modules onsite and 

 at field installations, it should be insured that a crane with sufficient 

 lifting capacity is provided as the two-pipe PT-1 module weighs approximately 

 11 metric tons and the PT-2 module weighs about 4 metric tons. 



Assembly of the breakwater is begun by arranging the tires according to 

 the pattern shown in Figure 4 but leaving out those tires labeled free tires 

 (i.e., all tires not connected in some way to a belt). This phase is depicted 

 in Figure 10, where the last tire is just being rolled into place, and also in 

 Figure 11, where the conveyor-belt strips are being prepared by cutting to 

 length and punching the five-hole bolted pattern with a gasket or leather 

 punch (also shown in Fig. 6). 



Having assembled the tires, the belts are then guided through the tire 

 casing according to the pattern shown in Figure 4. An illustration of this 

 procedure is shown in Figures 12 and 13. The belt-to-belt connection is then 

 completed by overlapping the belt ends and inserting the five bolts required 

 for each connection (see Fig. 14). A single bolt is used to fix each belt 

 loop to the sidewall of one belt-loop tire (see Figs. 15 and 4); this prevents 

 the belt from rotating under wave action. 



After all the belt loops have been bolted together and anchored, the 

 remaining free tires are rolled into place. The unit is then ready for inser- 

 tion of the pipe. One forklift is used to raise the pipe and position it for 

 entry into the long tunnel created by the 56 alined tires; a second forklift, 

 or similar device, pushes and alines the pipe as required. This having been 

 accomplished, the module appears as shown in Figure 6. The tire retainer 

 shown in Figure 7 (or the one depicted in Fig. 8) is then installed at each 

 end of the pipe, and the PT-1 module is ready to be lifted into the water (see 

 Fig. 16). 



16 



