How To Cut Stringers On 45 Degree Corner - Page 2 - Framing - Contractor Talk

How To Cut Stringers On 45 Degree Corner

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Old 12-19-2017, 10:53 AM   #21
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Re: How To Cut Stringers On 45 Degree Corner

Originally Posted by medial View Post
The only thing you have to do is change the length of the run. Anytime you are dealing with an angle you must remember that degrees implies you are working with part of a circle. A circle has 360 degrees and you know the part of it you are dealing with. In your case that is 45. Do this: divide 360 by 45 to get a number. Divide this number by 4 to get another number. Whip out your smart phone calculator and find the square root of this last number. Multiply your standard run by this square root and you have your new run. Works for any angle.

Sometimes you will run into some really weird requests. I was asked once to build a 7 sided gazebo with 3 riser steps all around. Every stringer was going to be a hip stringer. Here's how I figured out the run length and tread angle cuts:
Tread end cut angle = 360/2(total sides) =360/14 = 25.714 degrees = just under 25 3/4 degrees.
Run length multiplier = square root of (total sides/2) = square root of (7/2) = square root of 3.5 = 1.871 (multiply the standard run by this to get new run.)

I didn't need Trig or my ProCalc. Just my brain and a smart phone.



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