Cut Roof Support

[vivyorks]

Hi Static,
I have two 10ft lengths of timber. But when I put them against the purlin they drifted down with the angle. So can only use a small amount of the timber. Do you think that will be enough to attach?
Viv.

 

[Static]

Use bolts through both old and new and when tightened it should remove the angle. You probably only need about 2 rafter centres beyond the split, so about 1.2m each side then put in bolts every 250mm or so at staggered centres, use the largest washers you can.

 

[masona]

Must be one hell of a bend in the middle

If it's that bad I beginning to think it may be easier to use 3" angle iron instead.

 

[vivyorks]

Hi Masona,
Looked up angle iron but still none the wiser. What do I do with it and where do I get one?
Viv.

 

[masona]

Have a look in the Yellow Pages under "Steel Fabrications" and get them to drill the 10mm holes ready for you, approx 300mm centre, then just nuts/bolts them together. You will need 2 length of angle iron.

Pity you're too far away from me, I could've done that for you with your timber & packed the bend solid

 

[vivyorks]

Hi Masona,
Sorry it`s been so long but you know how it is
I have managed to put some rods up that I got from a timber yard that the name escapes me. Here is a pic, do you think it will be any good? I have put a rod on both sides and joined them together. Looks solid enough but would like your expert opinion please.
Thanks, Viv.

 

[masona]

Can't see anything

 

[vivyorks]

Sorry been trying to work out how to attach a pic lol.
Did not think you would reply this fast
Still trying xx

 

[joe-90]

I think there's some part of the story missing here. I've never seen a joint like that - ever!. I'm guessing that at some stage someone has removed a wall below (maybe making the bathroom/loo one big room) and that joint would have sat on a brick pier (no-longer there). That roof wouldn't have lasted from when the house was built until now if something hadn't changed.
You need a structural engineer me thinks.

 

[masona]

I've never seen a joint like that - ever!.

My purlin is exactly the same as the picture built in 1902. Why they didn't overlap it then I have no idea, my roof rafters is bowed and all I could do was to strengthen it to stop it pushing the wallplate of the wall. Seen quite a few though even butt joints

 

[joe-90]

The purlin in the picture is held in place by the rafters - rather than taking the deflection out of the rafters and sending the weight into the foundations.
This is absolutely fundamental architecture/structural engineering. Not even a schoolboy would commit such a blindingly obvious error.