Glen-L.com

I'm looking over the bill of materals for the Rogue river boat.

Its calling for 520 SF of plating? Thats 16 sheets of 8'x4' aluminum. Am I missing something here? I like the design but thats more plating than most of the 24' plus ocean going boats? I have not purchased the plans, but I'm wondering where all of this is going? I see in the photos the frames are made of plate, can these be changed to extruded shapes? In my pricing the plate and angles are cheaper than the plate per weight.

I just want to clarify before I buy a set of prints

Thanks

You might give them a call...I see what you mean. It doesn't quite add up.

_________________
Bill

I told my wife we needed a three-car garage for my projects...she told me to ask her for permission next time before I buy a house.
http://www.unitybuild.net

youngT,
I don't know the design; but a 500 ft2 boat sounds like a typo?

Lots of times the bottom framing of sleds or jet boats is full ht.- that is, from bottom to deck in one piece and that would be a tall extrusion! Extrusions up to about 3" or maybe 4" on a side are about the same cost per pound but they get a little more expensive if they're 10" wide -for example.

Also making the hull longs from plate is better practice than making them of 6061/6063 as most extrusions are sold. If your design calls for a 12" tall VKB with 10" tall longs at the 1/4 buttlines for example, these would all be made by press braking parts (long rectangles) of a sheet in order to get the top flange on all the longs AND to have a the 'egg crate' of uniform alloy. If you do end up welding the bottom framing then the flanges are likely to be called for heavier than the web or vertical. Space framed trusses can be made up to work- using extrusions and framing like a 'Jr.Beam' but they're lots more work to get the gun into to weld them once they're fit. Reaching down inside an extrusion framed and trussed skiff with a MIG gun is a chore.

If you need lower costs then use 5052 for the interior 'framing plate' and 5086 for the bottom panel. I'd try to buy the bottom in one piece if it were available in your area? 6', 7' and even 8' wide sheets are regularly sold in 5086 and 20' lengths are not the only size/length available either.

Cheers,

_________________
Kevin Morin

youngtrout, did you give Glen-L a call?

_________________
Bill

I told my wife we needed a three-car garage for my projects...she told me to ask her for permission next time before I buy a house.
http://www.unitybuild.net