06-21-2017, 10:59 AM
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#5
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Yurt Forum Addict
Join Date: Nov 2013
Posts: 2,185
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Re: Looking plans for small yurt
The Kaminari yurt can definitely be reduced in size to 10' d. But you have to know how to do it.
This is for a yurt 10'4" in diameter. That yields 23 rafters at 17" centers at the wall. That yields squares in the laths, with 12" hole centers, as per the Kaminari plan. How'd I get that? 17" is the center to center distance of rafters in the Kaminari plan that has lath holes on 12" centers. A 12" square has a hypotenuse of 17". 17 x 23, divided by 12", is the circumference in feet of a 10'4" diameter circle. You have to have a whole number of rafters. I did the math for you.
Just imagine you are looking at your yurt through the middle 10'4", wall to wall, including the ring. You layout half that width, 5'2", as a full scale cross sectional view on a large floor like a garage floor, and set your rafter stock in place on the section to get the correct fit of bird mouth to wall, length to ring, and length and angle of rafter end into ring slot.
Draw a straight baseline (the ground) 5'2" long. The wall line, perpendicular to that baseline on one end, up for 62", which is the wall height when the yurt is erected. At the other end of the 5'2" baseline, draw a line perpendicular to the baseline up 8' (the top of the ring) The cross section of the 30" wide, 4.25" tall ring, sits on that line, parallel to the floor. So draw a section of the ring with 15" towards the wall side. The top of the ring is 8' off the floor, with 15" extending towards the wall side.
Note* I modified the Kaminari lath hole plan, and made my laths 90" in length, instead of 96". That leaves holes 3" in from each end, instead of 3" and 9". An unsupported 9" stub is prone to breaking.
So, now you have a 10'4" yurt cross section drawn to full scale. The top of the wall in its installed position is 62" in height, where the rafters sit. The top of the ring is 8' in height, the centerline of the 30" wide ring is 5'2" from the wall. To get rafter fit, merely lay your 1x3 rafter stock on the layout so it fits into the drawn ring cross section, and lays 62" off the floor on the top of the wall. Mark it up, and you'll get an >exact< fit of rafter to wall and ring. The length and angle are on the money.
You'll have 23 rafter slots in the ring. So build it accordingly. Use the 30" ring outside diameter and 22" inside diameter. I suggest spacing the rings with 4x4 that has been sized appropriately instead of using 1x. Cut the 3/4" plywood rings. Lay out the rafter slots. Lay a segment of 4x4 on the ring and mark the spacer size. Thickness the 4x4 to 2.75". Cut the 4x4 to one of those segments, and at the appropriate thickness, I think it is 2.75" if I remember correctly. Check the plan.
Easy, huh? lol Go for it.
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