Replacing chains on old windows

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Old 03-03-16, 06:26 AM
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Replacing chains on old windows

I am refurbishing old wood windows which are 75 inches tall (full height of both sashes). The pulley for the chains are still in place but the chains are long gone. I have a source for replacements, but how do I estimate the length each chain needs to be? I was thinking 75 + 6 inches would be sufficient? You should not have any slack on the chain that holds the weights -- correct?

Any suggestions would be greatly appreciated.
 
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Old 03-03-16, 07:14 AM
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I don't measure the chains/cords. I brace the top sash all the way in the upper position then tie or attach the weight so it's about 1/4" -1/2" from touching at the bottom. If you are trying to estimate a needed length for ordering I not try to cut it too close as extra can be cut off but too short is too short.
 
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Old 03-03-16, 09:32 AM
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It's hard to estimate.... I've always bought the chain in bulk and cut in place.
 
  #4  
Old 03-04-16, 05:12 AM
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Found this formula on a website.

Estimating Length

For double-hung windows, the approximate total required amount of chain can be calculated by the following formula: (1/2 the sash opening height + 2 feet) x 4.
 
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