I am building several “slings” from copper tubing and sweat fittings. These slings are used by our high school crew club to support long racing shell type crew boats. I have used 3/4″ cupper tubing and fittings to make several of these slings. The slings are built with cross-pieces (somewhat like a folding chair; the cross-pieces are joined to vertical pieces by 45 degree elbows. The vertical pieces support a horizontal piece over which a fabric sling is draped; the boat then rests in the sling. The whole arrangement resembles an old-fashioned laundry basket support. I have had two failures (so far) in 45 degree elbows. The elbows themselves failed.
I am seeking a stronger 45 degree elbow that I can sweat onto 3/4 inch cupper tubing. I believe that if I could find a 3/4″ BRASS 45 degree elbow that I could sweat to copper tubing, it would solve my problem.
Can you offer any advice or point me in the direction of a supplier?