Mast Splice

[Capnblu@shaw.ca]

Hello Sirs.
I have a isomat ng 86 that was broken right at the lower spreaders. The break was fairly clean, leaving a short section bent that I intend to cut out. The base of the mast also received a wrinkle that will need to be removed. I thought I would sleve the mast at the spreaders, and put the extension (to bring back to stock legnth) piece at the base. After reading the various threads on splicing, I feel good about following your techniques. I believe the dimension of it is 9.7" X 6.8" If I understand correctly my splice should extend into each end of the existing mast. So a total of about 60" splice, right? Do I understand correctly that you notch a V out of the width of the splice end, or do you taper the thickness of the splice?

Thanks Brian

[Capnblu@shaw.ca]

Bump Any one care to comment?

[Brian Duff]

Did you find my earlier posts about this?

Yes - you V-notch the ends of your splice plates to effect a taper

60" is way to long for each splice plate, try 30" or 15" on each side of your joint

two splices is fine.

the MOST IMPORTANT part of all this is that you get a good tight square joint before starting to fasten anything. glue can't hurt.

use machine screws not rivets, splice plate should be next up nominal thickness from your existing mast wall. walk around and find 25 different splices on rigs near you, analyze and average what you see ( length of splice, size and number of fasteners) then do yours that way.

come back if you cant find a way to do it the way all the others are done.

[Capnblu@shaw.ca]

Thanks Brian, yes I have read the threads where you described this.