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#34095 - 12/04/16 12:14 AM Re: 32' clear span [Re: troleau]
Jay White Cloud Offline
Member

Registered: 11/06/08
Posts: 479
Loc: Vermont
Hello Trent,

I agree completely with Sean (Hylandwoodcraft)...

A Queen Post system would really be superior to a King Post system considering your design parameters of a lower style pitch, no central post and a fully functional Venting Monitor.

You should get a PE as soon as possible for peace of mind alone. If you do choose to forgo not consulting a PE with timber framing experience. I would suggest going with much bigger timbers than you probably need, and building a scale model that you can load to failure while observing deformation of the model frame's joinery.

There is also (blasphemy...I know) precedence for adding metal rods or wedged straps. Post and Beam designs with these metal components could span the desired 30' (or more) with just some key hardware in strategic locations. Its not out of context historically either, and much easier to build and engineer...I can think of several designs that I could do under these parameters that I probably wouldn't bother my PE with since it would be for my own use...(as is the case with you)...and this isn't a Public Works Project. Metal sometimes just makes things SO MUCH easier...we could be done with our current project if we had employed more metal, but wanted the challenge of using as little as possible and designing for joinery only...

Good luck, and look forward to updates or more query...

Regards,

j


Edited by Jay White Cloud (12/04/16 12:16 AM)
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#34096 - 12/04/16 05:16 PM Re: 32' clear span [Re: troleau]
TIMBEAL Offline
Member

Registered: 12/10/07
Posts: 1875
Loc: Maine
Blasphemy, Jay! But if you must.
https://www.youtube.com/watch?v=9A0yFHuZs2A

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#34097 - 12/04/16 11:35 PM Re: 32' clear span [Re: TIMBEAL]
Jay White Cloud Offline
Member

Registered: 11/06/08
Posts: 479
Loc: Vermont
Yikes...!!!!...Terrifying Video... eek wink

I was thinking more along the lines of Green and Green style metal straps and some wedges. Many of the timber frames (usually Church, Cathedral or Theaters) that pushed the limit for span would employ these at critical locations like the joinery between Queen or King post and Tie Beam...

Just this little bit of traditional Iron Work and things get much stronger and can span further...but...it is metal. It seems to be the...go to...for many and I wish more effort was made to just engineer it with all wood joinery. Nevertheless, if metal is necessary (or makes things fiscally viable) then let it be traditional... smile
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#34098 - 12/05/16 06:19 PM Re: 32' clear span [Re: troleau]
Hylandwoodcraft Offline
Member

Registered: 03/23/11
Posts: 141
Loc: Western NY
Whew! Watched the video, and boy, NOW I realize it. The wasted years I've spent timber framing! My wasted youth, never to be reclaimed! Where were you all this time steel agricultural utility building framing?!
Thanks Tim, for taking the scales from my eyes, and awakening me to my TRUE calling in life!

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#34099 - 12/05/16 06:30 PM Re: 32' clear span [Re: troleau]
TIMBEAL Offline
Member

Registered: 12/10/07
Posts: 1875
Loc: Maine
I know, Hyland... it just makes those creative juices flow! I missed my calling too.

I hear ya, Jay. I put some through bolts in a some splices on my last frame. o:

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#34197 - 05/07/17 10:03 AM Re: 32' clear span [Re: troleau]
Ladd_Framing Offline
Member

Registered: 09/12/14
Posts: 2
If you ever get down to NH, stop in Warner (Exit 9, I-89). Behind the library on Main Street you can see the "raised bottom chord trusses" we used on this outdoor stage. The advantage being more headroom at center span.

http://mainstreetwarnerinc.org/

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