aluminum

Diana, with rig up and graphics on. Showing primary 1-7/8" 'roll bar' rail of solar-panel arch; awaiting (smaller) aft section of assembly.

I cracked the boom on my 1986 Catalina 22 and need to do some welding repairs. Does anyone know what aluminum grade the factory used to make the extrusions? I'm guessing 6061. Can anyone confirm? Thanks

The sheaves on my boom are obviously way passed expired, so... I tried to remove the boom ends so I could access the sheaves, and they (the aluminum boom caps) were held in with stainless steel bolts. The last time I ran into this the 3/8” bolt had a hex head. This time it is maybe an 8-32...

So I have an arch on the back of my 26S made of 2" aluminum tube, and the idea is to use it to support all sorts of "stuff" on the back of the boat. There are a couple of lifting applications where I would like to attach padeyes to the aluminum tubes for swivel blocks or snatch blocks, and there...

Wondering if anyone has recommendations for a replacement trailer for the 26D for salt water use? My galvanized trailer is getting old and showing some rust. Aluminum vs. Galvanized steel, brand, pricing, ect, etc. Thanks, Michel G.