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Old 08-01-2012, 07:56 PM   #1
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Triangle molding under staircase


I am having difficulty figuring out angles for molding under staircase. Bottom left angles is 90, any tips on how to measure the other two?
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Old 08-01-2012, 09:26 PM   #2
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Triangle molding under staircase


Do you have an adjustable angle?

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Old 08-01-2012, 09:33 PM   #3
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Triangle molding under staircase



Use this tool--to find the angle---a cheap plastic one will only cost $5.00 OR LESS--

Once the tool is set to the actual angle--use that to cut or fold a sheet of paper to match--fold the paper in half at the point--That is the miter saw angle---make a test block--adjust for a perfect fit--then use those numbers--

Or buy a protractor---every one has paper on hand---Mike---
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Old 08-01-2012, 09:33 PM   #4
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Triangle molding under staircase


If I'm not mistaken, that base cap cut is About a 72 degree cut 2 times on the right bottom point . About a 63 degree cut 2 times on the left upper point. If you are adding a flat section at the top left point then that will be a different angle. Your two angles you're working with will probably be About 36 degrees and 54 degrees respectively.

Those angle finders are fun! A line on the wall and a speed square with a torpedo level is a quick and easy approach too, if you can swing the speed square around without bumping into something

Last edited by hand drive; 08-01-2012 at 09:39 PM.
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Old 08-03-2012, 05:18 PM   #5
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Triangle molding under staircase


Thanks for the tips, going to give it a shot tomorrow
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Old 08-04-2012, 10:30 AM   #6
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Triangle molding under staircase


Hand drive is right. My guess would have been 75degree angles. Of coarse now you will need to make a quick jig to cut them accurately on the chop saw. I usually cut a piece of 1x4 to a 45 degree angle and use the pitch cut as my fence. You can cut very steep angles this way. Hold on to that work piece though.

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