Did you look closely and see the main supports tubes are not completely round but have a flat on the inside surface ?? Location: Adriatic sea The material is an aluminum alloy of course, pure Al is never used because it has very nasty machining properties and is too soft.
The immaculate surface can be the result of careful polishing and anodizing, but it may also be paint.
Location: Gold Coast Australia Hi hyboats - The tubing is aluminium alloy probably of the 6000 series.
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EZ FRAME - A software program that quickly allows you to design, calculate and bend your frames so they are right the first time. Much of Black Dog Design’s work can be seen in this photograph of sailboats at Mountain Harbor. The photograph above shows boat covers, bimini tops and frames, mainsail covers, line bags, helm covers, and even a cover to protect the boat name on the stern from the elements.
The custom covers on this Hunter sailboat not only protect the mainsail, cockpit and bimini, but there is also a cover to protect the boat’s artwork on its stern! All projects are custom and require careful measurement and the making of patterns prior to cutting and sewing the fabrics. Mike designed and fabricated the frame, and the fabrics were then patterned to work with the new frame.

Black Dog Design is located near beautiful Lake Ouachita, Arkansas, about 25 miles west of Hot Springs, AR, at the intersection of Highway 270 and Mountain Harbor Road. Look closely at alloy wheels: once they were all anodized, now most are spray painted to look even better. Bimini frames can be fabricated according to customers’ wishes and the space available on the boat.

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