I am looking for a detailed design drawing for a king tuss for a timber frame porch I am building. It needs to be 7/12 pitch and will be on posts at 12 feet. Timbers will be 6x4. Thanks.

Hi Yooperdirt,

We can see what others have to say, but 6"x4" for a King Post Truss is pushing it without going into some "laminate design" types, or more advanced joinery to make you demensions work. Have you done a lot of timber framing? It's doable, but you really should have a PE look at your design before moving to layout and jointing. Also try posting on:

http://www.forestryforum.com/

Regards,

jay

What is the span?
What is the roof area that the truss will be supporting?
What is your snow load?
etc. etc.

Thanks guys.

I can make it out of 6x6 no problem. I will be using red pine. I went to Northhouse so I have some experience. I operate a saw mill and built the house myself. The truss will be spaning 12 feet and will be on two maybe three concrete split face block piers. The porch will be built off the gable end of my house and I plan on using conventional framing to tie it back to the house. The house is on a 8 inch block fundation so I cannot really set posts back at the house side of the porch.
So the heavy timber frame will be isolated out on the piers. The porch will be out 6 feet from the house. We are heavy snow load here in Upper Michigan.

We do this all the time, why is it not possible in this case. I do not see good results when "new" architecture is just attached with lags to a pre existing structures.

I would also suggest posting picture of the work site and some drawings, either here or provide a link. 12' seems doable, but there are other factors I would like to see to be certain of the advice I would share. If the end bent is a "timber framed king post truss assembly," I would not structurally or aesthetically want to use stick built "tie in" to the existing house. Build it as a timber frame, or stick build it out as a standard build. Mixing the two methods often leads to problems.

Regards,

jay

Here are some pictures. I have no existing nailers or jack studs on the house to accomidate this porch design. The building inspector suggested that I use hangers to tie in at my double top plate on my stud wall. I would weld up some hangers to accomidate two 4x6's. My rafters would then sit on those.

Can't figure the picture thing out. Sorry

Send the directly to me at tosatomo@gmail.com

Regards,

jay

Ok I sent them would you be able to post them for everyone?

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Have to try that again.

Thanks, I have been, I can't seem to add pictures or attachments, nor can I got back and edit old entries. Any suggestions?

I got tired of dealing with pictures and just loaded stuff onto U-tube. Simple to copy and past the link.

http://www.youtube.com/watch?v=nTZUwcwDGyI

Thanks timbeal you just gave me an idea! I love the piano playing in the back ground!!!

We still need improvements here, like better edit support.

Photos

Attachments...etc.

Howdy Fellas,

You have to have an independent picture hosting site. I use "Drop Shots". Its real easy to set up.

Then you simply upload the pictures to your new account. Select your picture. Right click. Get the image info that starts with "http:.....". Copy and then paste here with the insert image dialogue box.

Sounds convoluted, but its not.

Thanks Mo, I saw the train leave the station and had to walk to get where you are at...I can be slow sometimes for a relatively smart person...

[img]https://plus.google.com/share?url=https%3A%2F%2Fdocs.google.com%2Ffile%2Fd%2F0B1BtPD-BzGILd1lCbDEzcENhVnc%2Fedit%3Fusp%3Dsharing[/img]

Well, we will try again, arrrrgh!! this forum!!!





Any body know how to make the photos larger? These are the OP project photos.

Thanks for posting the pictures Jay! I was thinking with the king truss I would have to run purlins. Would that make things more complicated to tie in to the house? I am open to any design ideas or pictures I guess.

Please provide dimensions and measurements for the drawing. Purlins are possible but will have to be more of a freestanding structure with to bent assemblies. As stated before, I don't condone tie ins that get bolted to walls as an afterthought in design, it is not good craftsmanship IMO. and can lead to other challenges down the road. You can put in for masonry plinths of different types, just choose one. Below are some simple examples of what can be done.









http://www.timelesstimberworks.com/luikartcabin.html

http://www.timelesstimberworks.com/horsebarn.html

Hey Yooperdirt, I am currently cutting a king post frame for a shelter over my deck. I live in Gladstone, MI. The jowled posts are 7 x 10 at the top cut down to 7 x 7 at the bottom. All the other timbers are 7 x 7. It will have an English tying joint and curved braces. I obtained the plans from Peter Hendricksen at Northhouse Folk School. Basic size is 10 x 12 feet. You may be able to find a frame to fit your needs on the Northhouse site under the timeberframing classes. If you would like to look at my frame, give me a call 906-399-4920. Good luck.


Skip Dillon