Cutting a 3x2 into a very long wedge?

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Could I set a table saw to cut a 3x2 diagonally along its length?

Like this:

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It's to level the underside of a (not quite) flat roof. Or is there a better way?

Thanks.
 
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This is the roof, I want to level it so that the RSJ is lost into the roof space.

IMG_5217.PNG


Or if I put a full 3x2 all the way along do you think it would look odd with a slight slope once it's all finished?
 
You can screw a strip of mdf to the wood, fixed at the angle, then push it through against the fence.

The site way to do it is free hand with a skil saw or these days a track saw -sister another joist next to it so the saw doesnt rock
 
they sell them at your builders merchants"firing strips"
tell them the fall and length required
or as above secure to a board aim for 600-900 sections to keep them managable
in this instance 4x900 will give you some wiggle room to slide the second wedge to the point the ends are an exact match
 
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Or if I put a full 3x2 all the way along do you think it would look odd with a slight slope once it's all finished?

Yes.

See the above two posts, and do it properly. Notch's method is the best, but it's also best to put a couple of screws into the joist you're cutting from the sistered side (well away from where you're cutting of course) and then clamp it down if you can. If you're using a track, then you may need to add a third piece for stability under the track. Cutting the 3x 2 along it's length will tend to push it away from you, but you'll handle it okay.

Otherwise, use a jigsaw, and then run the plane along it.
 
You can make a guide by screwing a hinge to the end of two long strips of straight timber- so they are side by side and hinged at the end. Then you can open the other end to create any angle you need, and either fit a fixed piece of timber as a third side, or make a part that is adjustable.

Putting that alongside the fence means that timber fed into a table saw will be cut at An angle
 
I've just phoned Howarth Timber and they will cut me 3x2 into a firing strip for free, just pay for the wood.

Every days a school day, thanks (y)
 
as an aside if you use 4x2 you can accurately make say 75mmx900xabout 53mm at the other end then rip the off cut on a strait cut to the correct size as 3x2 will tend to be anywhere between 63 and 76mm
 
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Because I'm lowering the ceiling.

He would normally use a smaller nogging to leave a 50mm air gap over the top.

IMG_5408.JPG
 
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You can make a guide by screwing a hinge to the end of two long strips of straight timber- so they are side by side and hinged at the end. Then you can open the other end to create any angle you need, and either fit a fixed piece of timber as a third side, or make a part that is adjustable.

Putting that alongside the fence means that timber fed into a table saw will be cut at An angle
On a 3 meter length? Works well enough for furniture leg lengths, though

Another solution is a chalk line and a circular saw - sistering the 3 x 2 to two other pieces for support. This approach takes a sharp rip blade (few teeth) and a steady hand and is much easier to accomplish with a large blade saw (e.g. a 9in Makita, etc) than a small blade saw. Can be done freehand the other way using a table saw or a band saw, but you need to be competent to use a static saw this way without the fence
 
I got the furrings today, notched out a bit for the RSJ, pre drilled some holes then put 105 screws on the wrong side :LOL::LOL:

Idiot!!!!

IMG_5402.JPG


IMG_5407.JPG
 
I tried to cut my own firring strips for my flat roof. Needed 13 of them 5m long. Ripping wood with a circular saw is not a good idea. After the stopping laughing at my first pair - looked like a wave, my circular saw burned out. Went down the wood yard and they cut them for me. Then down screwfix for a new circular saw.
 
Only time I’ve done these freehand is on my dad’s garage conversion... it was a Sunday and the timber merchants closed... otherwise always get them to do it and just go pick it up... much less agg :D

And glad to see “firing strips” finally became “furring strips” :LOL:
 

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