The Forestry Forum
General Forestry => Timber Framing/Log construction => Topic started by: 20ozjolt on April 06, 2017, 02:13:20 AM
(https://forestryforum.com/gallery/albums/userpics/45186/61928e33b6e0e0ed5be34ddbc1a0ae9a.jpg?easyrotate_cache=1491458848)
I'm looking at different options for doing a timber frame gazebo with a hole in the center for a chimney and I my random searches I came across this photo with no other information this is why I hate Pinterest
It is called a reciprocal frame, or hand in hand framing. It is "self supporting".
(https://forestryforum.com/gallery/albums/userpics/10017/grillage.jpg?easyrotate_cache=1491480244)
(https://forestryforum.com/gallery/albums/userpics/10017/recipframe1.jpg?easyrotate_cache=1491480320)
A yurt is somewhat similar in look without the stepping problem, however the forces are different. They have a compression ring at the oculus and a restraining tension ring containing the rafter feet.
Good info there. Didn't know what it was called, but knew of it ad how it was done. ;D
The illustrated frame appears to me as razzle-dazzle, I'm not sure how all that heavy timber relates structurally to the lightly framed radial rafter system. I would guess a compression ring up top and a tension ring at the plates was employed. It would be good to have other views to really get an understanding of this frame.
I was looking at the beams not all that extra stuff... lol
My thought was good old tongue and Grove 1x6 or 2x6 for the roof.
With this frame should I use a lap joint at the top to lok it all together and put the rafters all on the same plane?
EDIT Wow thank you reciprocal roofing is the term I needed for research
I am amazed at what I pick up on this forum on a near-daily basis. Thanks 20oz and Don for this educational moment.
I did a reverse image search on the Pinterest photo and found the builders. Not much technical info but some more views of the structure: http://www.gardendesignhereford.co.uk/gallery/the-octagons/
Now I need to figure out a way to make sure my wife never sees this... :D
From TimberHomes LLC:
(https://forestryforum.com/gallery/albums/userpics/18309/TFLLC.jpg)
Also, the book Reciprocal Frame Architecture is a good resource.