Author Topic: Split a beam on diagonal!?? (Read 939 times)

quadracutter222 · « **Reply #20 on:** November 02, 2019, 11:39:49 PM »

What I’m stuck on figuring out is do I clamp the beam or the x braces holding the beam???! I’ll be at the mill tomorrow, so we’ll see what u come up with.

doc henderson · « **Reply #21 on:** November 03, 2019, 07:19:06 AM »

the prev. jig allows the clamp force to hold the cant from the side. he is making an octagon. I think the weight of your cant will be enough to hold it in the top of the V, but if this is for framing(and a couple screw holes do not matter), you could put some screws through your 2x jig and into the cant you are cutting. (below the blade plane). since you are cutting in half, and not just trimming off an edge. your clamp on the mill will hold the jig in place. what I envision for your application is a similar jig but the back of his jig that is against the log stops would rotate 90° down to rest on the bunks or bed of the mill.

quadracutter222 · « **Reply #22 on:** November 03, 2019, 10:01:44 AM »

That is what I am thinking, it will need to be screwed down to the V supports rather than clamped as the clamp would be on the underside of the V and tend to push up I would think.

Here is a picture that shows my set up. I am thinking a wide 2x board that would span 2-3 bunks, that would get held down by the clamp. The V supports would get screwed to that, then the 8x8 toe nailed to the V's.

Or just make 2-3 V supports that slip over the bunk rails and forgo the clamp...

I will keep you posted!

doc henderson · « **Reply #23 on:** November 03, 2019, 12:10:19 PM »

what kind of wood and how long at a time did you decide on?

quadracutter222 · « **Reply #24 on:** November 03, 2019, 02:15:34 PM »

Will be doug fir 8x8's and only one 8 footer and a 16'

doc henderson · « **Reply #25 on:** November 03, 2019, 02:42:21 PM »

I would put a 2 x on the deck building the jig up from there. I would make the back that goes against the log stops at 90° to the bottom so it is held at that angle. If you may use this jig in the future and or you are buying dedicated (expensive) lumber to build it, I would put some time into it, and consider using a glue and screw. titebond 3 as example or tube construction adhesive like f26. I might add a hand drawing of this if it would help.

doc henderson · « **Reply #26 on:** November 03, 2019, 04:48:39 PM »

so I mocked this up in the shop with an old chunk of 2 x 12. this is an end view and assumed you are using nominal dimension i.e. 7.25 inch is a 8 x 8.

Larry · « **Reply #27 on:** November 03, 2019, 10:03:01 PM »

On the log stop side put maybe 4 deck screws through the "V" form but only let the points come through 1/8 to 1/4". On the clamp side use 2 or 3 deck screws and go into the cant about a 1/2".

When I was sawing the triangles I felt like I could probably get away without using any screws and just let the weight of the cant hold it in the "V" form. I was too chicken to try it and find out if it would work without screws. If I did it often I would come up with something faster/better.

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