ok, just found a pic on the cypress post. that is very different than the sketch you posted in this thread...


it is a bent raising. my original thoughts can still work - but you'll have to heave ho that ridge up from where the rafter hits the kp. tricky, for sure. you'll need muscle, ladders, and maybe some staging.

Hey bMike,

here is a picture. got to thinking about some lumber attached to ridge and carry up over post plates and then up on king posts.

Commons are housed into ridge and plate and drop from above as well. What do you think about the process? Still have to wrestle with lay-out of post plan for correct and safe assembly, that's why we have thought of a form that would place posts and raise bents (X2)



have used forklift so far.

way bigger than i thought and gathered from your original post.
i can see using a gin pole that is centered - i just wouldn't raise both at once. seems too tricky to pull off.

how fast does it need to go up and down? what is its end use?
will you have access to man and woman power?

the frames i've done in exhibition halls have all been a bit smaller than this - either 10x10 or 12x12 or 10x20, with lower roof pitches so we had easier access to the ridge.

I had to remember where I stuck this link;
http://ads.ahds.ac.uk/catalogue/adsdata/arch-769-1/ahds/dissemination/pdf/vol10/10_089_112.pdf

Check out fig 32 of the raising of the Priory Place frame. I'm not sure whether I'm reading the diagram correctly, that this was done together or whether he is showing 2 seperate lifts from one station.

thanks Don.

Ill be sure to explain later.

i dont see the advantage of raising both at once. i would use a centered gin pole, raise one bent and go ahead and put the plates on. the other end of the plates you can hold up by a temporary post while you raise the second bent and drop the plates in place. you can then take down the gin pole and span a couple boards across the plates to use as scaffolding while you put on the ridge beam. just lift the ridge over one of the walls and slide it up the trusses where you can lift it into place easily enough standing on your scaffolding.

hey arden,

As time has gone by I am beginning to agree with your first comment. This is a rental/showpiece, so time can be of the essence. We have actually been raising one bent, brace off, raise second bent, brace to first bent, and then dropping the plates on. We are maxed out, and my right shoulder is starting to get bigger than the other it seems. The scaffolding is a good idea. We have been putting the ridge on top of the spurs before a plate goes on, and then taking up with a ladder. This has proven to be a great "marketing tool" to timber-frame work in the area. Ofcourse, there can be all types of potential until the line is signed.



We call this one the Zephyr.

p.s. no machinery needed

Nice concept, a rental frame. Is the "roofing" canvas? Maybe ballistic nylon?

Tim

hey Tim,

marine canvas (AKA sunbrella). Grommets and T-nuts with flanges for screws, then bolted. we have done it 2.5 hrs so far. today took 5.

we think the rental is a good idea as well. all kinds of party planners looking for something different. timber-frame is modular in a sense and we are trying to take advantage of that. knock the pegs out, etc. although the longer this frame stands the more stubborn those pegs get. thats a good thing I guess.