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post #41 of 46 Old 10-20-2011
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There is probably 1 1/4" of solid glass on top of the header now, so I'm really not worried about any failure there BUT, as you say, any deflection would have an effect on rigging tension. I'm just thinking about when I go offshore and run into a real extended pounding if a post would offer any additional measure of safety. It would sit right in the forward V-berth doorway but I use this mostly for storage anyway. If anyone wanted to sleep up there they'd have to be skinny

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post #42 of 46 Old 10-20-2011
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John,
Little of topic, but how does a bicycle wheel work? With the weight on the axel of the wheel, which spokes are holding this weight?
The hub is hanging from the top spokes, and the rest are keeping the rim from going out of round. A while back I needed a large pulley for a 5-1/2" diameter hose, it was 10 feet in diameter. I designed and built the pulley just like a bicycle wheel, with 1/2" thick spokes that were tensioned by T-nuts in the rim. It worked very well.

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post #43 of 46 Old 10-24-2011 Thread Starter
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Used the Loos PT-3 guage and found fore and aft stay at 20% breaking strength and shrouds at 5%. Gauge works great, took 5 minutes to do this. Also measured tenstions easily while sailing.

Now I need to work on bringing tensions up in the shrouds.

One question for those that have used a Loos gauge. The gauge is calibrated for 304 stainless. If I have 316 wire, do I need to use a correction factor?
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post #44 of 46 Old 10-24-2011
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Diameter correction factor is the issue and that the guage is in range for that Diameter as there pretty limited in size range

Cable size 1/4", 9/32", 5/16", 3/8"

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Diameter correction factor is the issue and that the guage is in range for that Diameter as there pretty limited in size range

Cable size 1/4", 9/32", 5/16", 3/8"
For the Loos gauge, you read the number then go to the chart (sticker on gauge) that gives you % breaking strength and also the actual tension (in pounds) on the cable. The instruction manual says the gauge is for 304 wire. So when unsing with 316 wire do you read the % breaking then calculate tension based on that (since 316 has lower breaking strength than 304 stainless)?
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post #46 of 46 Old 10-24-2011
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15 on 1/4 is 1400 # tension no matter the material

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