CONTENTS 



FIGURES — Continued 



Page 



3 Orientation of PT-Breakwater 12 



4 Schematic of PT-1 breakwater module 13 



5 Definition sketch for PT-Breakwater , 13 



6 Assembly of PT-1 and PT-2 modules 14 



7 Tire retainer at end of pipe 14 



8 Breakwater and mooring-system components 15 



9 Tire mooring damper 16 



10 First step in breakwater assembly — rolling tires into place 17 



11 Tires are in position, ready to be tied 17 



12 Guiding conveyor-belt strip through tire casings 18 



13 Tensioning belt before completing belt-to-belt connection 18 



14 Belts are overlapped and bolted together 19 



15 Belt is anchored to sidewall of one tire 19 



16 PT-1 module ready for lift into wave tank 20 



17 Forces on pipe-tire unit 21 



18 Large wave tank at CERC with breakwater and MS-1 mooring system 24 



19 View toward wave generator 25 



20 View toward beach 25 



21 Inserting PT-1 breakwater 26 



22 Turbulence associated with wave damping , 26 



23 Attachment of seaward mooring line 27 



24 Strain-gage-cantilever force gage 27 



25 Force-gage calibration record and curve 28 



26 Mooring bridle used in field installation 29 



27 Load elongation curves for mooring-line inserts 30 



5 



