*
This one takes a little careful thought, and I know several will like the challenge. I had to laminate up a curved stair stringer. This stringer went 180 degrees around with a face radius of 70.00 inches. Ten treads at 18.00 degrees/tread. 7.62 rise. Each laminate is 5/16 thick, or .3125 inches. At the top and the bottom of this 180 turn, the stairs had a change of pitch. This laminate had to follow these pitch changes as I always have continuous laminates. These laminates have to be of increasing length each laminate, around this 180 degree turn. Beings there is a change of pitch at the top and bottom of the 180 degree turn, I have to know the length exactly for the face of the first laminate as it turns exactly the 180 degrees, and how much the next laminate needs to be longer than the face laminate for this 180 degree travel. In this case, I had to prepare four laminates for the glueup, so each laminate was a different problem, but for all practical purposes, the difference in length between the first laminate and the second,– and between the third and fourth was neglible. I would like to see if you guys want to twist your grey matter some more and come up with a quick and cute formulae for the difference in laminate lengths. I have never found this anywhere printed, as it is sort of a unique formulae, so I had to twist my grey matter a few years ago. I keep this little formulae on my calculator lid now.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Traditional lime wash still has tons of useful applications.
Featured Video
How to Install Cable Rail Around Wood-Post CornersHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
*
This one takes a little careful thought, and I know several will like the challenge. I had to laminate up a curved stair stringer. This stringer went 180 degrees around with a face radius of 70.00 inches. Ten treads at 18.00 degrees/tread. 7.62 rise. Each laminate is 5/16 thick, or .3125 inches. At the top and the bottom of this 180 turn, the stairs had a change of pitch. This laminate had to follow these pitch changes as I always have continuous laminates. These laminates have to be of increasing length each laminate, around this 180 degree turn. Beings there is a change of pitch at the top and bottom of the 180 degree turn, I have to know the length exactly for the face of the first laminate as it turns exactly the 180 degrees, and how much the next laminate needs to be longer than the face laminate for this 180 degree travel. In this case, I had to prepare four laminates for the glueup, so each laminate was a different problem, but for all practical purposes, the difference in length between the first laminate and the second,-- and between the third and fourth was neglible. I would like to see if you guys want to twist your grey matter some more and come up with a quick and cute formulae for the difference in laminate lengths. I have never found this anywhere printed, as it is sort of a unique formulae, so I had to twist my grey matter a few years ago. I keep this little formulae on my calculator lid now.