Re: Angled Spreaders - SailNet Community

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Go Back   SailNet Community > On Board > Boat Review and Purchase Forum > Sailboat Design and Construction
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Old 04-25-2008
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Re: Angled Spreaders

Has been some discussion about spreaders being angled, etc. Took a look at mine when I was stepping this season. There is indeed a slight upward angle formed into the spreader support. Looks like the order of 5 or 7%. The support butts squarely on the mast.

Was looking at a couple of other boats' masts on the trestles. Their spreader supports appear to be straight 90 degree angles from the mast.
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Old 04-25-2008
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During the winter layup following my first season owning our last boat, which had two masts, I checked over all the Selden spars which were set on cradles in the boatyard.

All four spreaders were correctly pitched to bisect the angles created by the shrouds and held in position by set screws. Fortunately, somebody knew what they were doing.
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Old 04-25-2008
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Normally from what I know is between 5 and 7 degrees, no more.

Not only it looks better, but a horizontal or drooped down spreader may have a tendency to slide down and cause failure.

Modern spreaders have turnbuckles installed and therefore they will not slide, so tilting them up, does equalize the angle between the lower shroud and the upper shroud, and reduces stress in doing so.

To me, when they are tilted upwards also makes it look really SEXY!!!
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Old 04-25-2008
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I was told that the spreader should bisect the angle of the shroud, which makes sense. If you have a carpenters sliding "T" bevel, you can quickly check the angle and adjust as necessary.
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Old 04-25-2008
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I recommend you check with the designer of the rig. I had a one rigger tell me after a rig inspection that the spreaders were sweep up and that was not right. He moved the spreaders to 90 deg. About 12,000 later another rigger pointed out to me that the hardware at the base of the spreader was designed for a slight upward angle. He wanted to move them up slightly. I checked the design drawings and found that the lower spreaders were designed to be set at 5 deg. and the uppers at 8 deg. up angle.

STILLRAINING (post below): MILES (I'd never give a rigger that many dollars unless he gave me a new standing rig.z0

Last edited by billyruffn; 05-08-2008 at 09:24 PM.
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Old 04-25-2008
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Last edited by Stillraining; 04-25-2008 at 10:30 PM.
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Old 04-25-2008
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Billy..it just goes to show what some "professionals" really do..

I tell you, man..in this business the more we know, the better served we get...honestely
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Old 04-25-2008
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I tell you, man..in this business the more we know, the better served we get...honestely
Best quote from you yet Alex..
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Best quote from you yet Alex..
Cool...I'll make it my signature!!! ehehehe
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Old 04-26-2008
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Mine don't seem to be angled when I look up at them, yet I know that they are because I made sure that they were square on their mounts and solid. The angle is not very apparent, and doesn't bisect the shroud angles...

I guess that's because the CS is such a great boat they don't have to stoop to rigging abnormalities in order to perform like lightning
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