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Old 15-06-2013, 06:21   #1
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Mystery Hole in Mast



This hole on the side (not the slots) is about 4ft from the top. With no screw holes. There is a matching hole on the other side. There is another, same shape with screw holes near the bottom aligned horizontally. It is machined.

Could use some help identifying what it was used for. Bought the mast used, 35ft for my refit project.

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Old 15-06-2013, 06:40   #2
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Re: Mystery Hole in Mast

Those were put in by Zspar to bolt on spreader brackets. Not the best in my opinion, but seemed to work for Zspar I guess.

I will be in Michigan next month and would be interested in seeing your project.

cheers,
Jeff
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Old 15-06-2013, 10:17   #3
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Re: Mystery Hole in Mast

Spreaders 4 feet from the top? More likely an aperature for the wire or rod rigging insert.
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Old 15-06-2013, 10:29   #4
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Re: Mystery Hole in Mast

The mast was likely longer than 35' at some point. Anyway, this is the standard style Zspar access and they have done the engineering to allow for this in their moments of inertia specs.
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Old 15-06-2013, 11:47   #5
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Re: Mystery Hole in Mast

"The mast was likely longer than 35' at some point. Anyway, this is the standard style Zspar access and they have done the engineering to allow for this in their moments of inertia specs. "

Yup...That makes sense
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Old 15-06-2013, 12:23   #6
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Down at the boat now it measures 5 feet 1 inch from the top and the same hole horizontally aligned is about 5 feet from the bottom and I appreciate the answers.
I'll see what z spar has on their website are they still around.

Give a shout when you get up this way. Stop by anytime.
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Old 15-06-2013, 14:21   #7
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Re: Mystery Hole in Mast

Zspar website is there: Z Spars International
The English index is there: Z Spars International

I have a Zspar mast: these holes at the top are for receving the capshroud end fittings, see the picture.

Alain
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