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scut941
Deckhand

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USA
22 Posts
Initially Posted - 08/15/2007 :  11:27:57  Show Profile
was there a previous post for the specs for an a frame construction under technical tips?
if so does anyone have it?
thanks
jason
jason glasstein
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stampeder
Master Marine Consultant

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1608 Posts
Response Posted - 08/15/2007 :  12:45:23  Show Profile
there are many many posts regarding the A-Frame.
I built one per the specs in the technical tips section. I have now abandoned the A-frame because I think it unnecessary.
The admiral and I raise the mast easily by ourselves. There is a recent post that discusses this.

Here is the link to the technical section, at the bottom is the A-Frame that I built and used. http://www.catalina-capri-25s.org/tech/tech25/bearsad1.asp

IMHO, best piece of equipment is the gudgeon mounted mast crutch that elevates the mast. From the crutch I walk the mast forward while the admiral hauls in the slack on a safety line (usually the jib halyard) the mast on a standard rig weighs 60LBs. Main thing is to know where all the rigging is supposed to be. Keep the rigging tangle free, and its a do-able job for two people.
Edited by - stampeder on 08/15/2007 12:58:33
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lcharlot
Master Marine Consultant

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Antigua and Barbuda
1301 Posts
Response Posted - 08/19/2007 :  23:06:00  Show Profile
Lifting the mast by hand on a Standard Rig is do-able if you have at least one helper, but, if your boat is a Tall rig, or you are trying to do a mast raising alone with no helpers, you really need either a gin pole or A-frame. The Tall Rig mast is not only three feet longer than the Standard, it's cross section is 1/2" larger in both width and depth, and the wall thickness of the extrusion is 1/32" more. This makes the Tall Rig mast substantially heavier than the Standard, I'd guess at least 85~90 pounds - it's approximately the size and weight of a C-27 mast. I use an A-frame made of two 12' long 2x4's, attached to the middle pair of stanchions at the base. 2x4's are awfully heavy, but they are a lot less expensive than 2.5" x 1/8" wall aluminum tubing, which is what I would prefer to use if I could find two 12' long pieces of it at a reasonable price. Your biggest concern is to prevent sideways motion of the mast while it is going up or down; if you are single handling this operation, you should modify your upper shrouds to a "Huntington Rig" configuration. This modification keeps the uppers under slight tension (no slack) during the whole travel of the mast so it can't sway off-center while you are lifting it. There should still be examples in the Tech Tips section of this web site on how to do a Huntington Rig modification.
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Ed Montague
Captain

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USA
499 Posts
Response Posted - 08/23/2007 :  23:27:22  Show Profile
Before I put a roller furling 150% on my standard rig I could lift the mast by hand with help using the main sheet and jib halyard attached at the bow. It took 3 of us, one lifting at the back and clearing lines, me lifting, and the third person pulling the sheet thru the main sheet blocks at the bow. Once I put the roller furler on (I leave the sail on when I trailer,(I know that will start another discussion.) the weight of the mast was far too much for me to lift, even with 3 people. I built an A-frame as discribed in the tech tips and now my wife and I step and unstep the mast by ourselves. It is amazingly simple. With the help of a mast crutch on the stern we can get the mast up in about 30 minutes from stopping at the ramp to being up. Get an A-frame even if you don't have a roller furler, nothing will ruin a vacation or weekend faster then straining your back or worse.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.