SOME HANDS ON EXPERIENCE AND RECOMMENDATIONS FOR OFFSHORE CAGES Elihai Radzinski Director Fibras industriales S.A.
SUPPLYING THE FISHING AND AQUACULTURE INDUSTRIES FOR OVER 70 YEARS PRODUCTION CAPACITY ABOVE 6,000 TONS PER YEAR
KNOTTED NETTING RASCHEL KNOTLESS NETTING TWISTED KNOTLESS NETTING BRAIDED NETTING ROPES TWINE
POLYMAX ROPES POLYETHYLENE WRAPPED IN MULTIFILAMENT POLYESTER
POLYTAR ROPE BEST FOR ABRASION RESISTANCE
ABRASION TESTING ACCELERATED SOLAR U.V. EFFECT
EACH RAW MATERIAL HAS ITS ADVANTAGES AND DISADVANTAGES NYLON – POLYESTER – PP – POLYETHYLENE – HPPE (DYNEEMA/SPECTRA) • BREAKING LOAD V. ELONGATION – WORKING LOAD • ABRASION RESISTANCE – WHAT DOES A GOOD BREAKING LOAD OR EVEN GOOD WORKING LOAD HELP IF THERE IS LOW ABRASSION RESISTANCE? • RESISTANCE TO U.V. – DO WE WANT ORIGINAL WORKING LOAD OR, REAL WORKING LOAD AFTER AN EXTENDED PERIOD OF EXPOSURE TO THE SUN • DENSITY – SINKS OR FLOATS? • WATER ABSORPTION – WHAT IS REAL OPERATIVE DENSITY? • WHAT IS THE MEMORY OF THE FIBER? – CAN IT HOLD A KNOT? • MONOFILAMENT OR MULTIFILAMENT – HOW BAD IS THE FOULING PROBLEM?
PROTECTIVE COATING FOR NETTING
BIRD NETS – TWISTED KNOTLESS MONOFILAMENT POLYETHYLENE
ANTI PREDATOR BRAIDED NETTING • BRAIDED NYLON • BRAIDED POLYESTER • BRAIDED MONOFILAMENT POLYETHYLENE NETTING
CAGE STRUCTURAL DESIGN – COLUMNS 18.0 m. .5 1.0m. .5 OREJA CON 210/96 x MANGUERA 2" 6.0 m. 5.0 CABO EE DE 3/4" 7.5 m 5.65 m CABO EE DE 1/2" TOTAL WEIGHT – APPROXIMATELY 225Kg.
18.0 m. .5 1.0m. .5 OREJA CON 210/96 x MANGUERA 2" 6.0 m. 5.0 CABO EE DE 3/4" 7.5 m 2.83 m CABO EE DE 1/2" TOTAL WEIGHT – APPROXIMATELY 229Kg.
FINAL TIPS • DON’T SAVE A FEW CENTS ON TWINE – CAN COST YOU MUCH MORE ON FISH • ALWAYS WASH YOUR CAGES WITH FRESH WATER THE MINUTE THEY GET OUT OF THE SEA • ALWAYS COVER YOUR NETS WHEN IN STORAGE REMEMEBER - SALT AND SUN ARE OUR BIGGEST ENEMIES
AND THIS IS HOW WE ASSEMBLE YOUR NETS AND CAGES
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