roof structural advise please
- Thread starter paulmars
- Start date
Click on SHOW MY IMAGES just below posting box to display your images and click on any to add to post.
I've gone to your album and looked at the pictures.
OK, the crack is simply through one knot..not serious.. simply screw a suitable steel plate (galvanized hold down bar or similar) with 2" - 2 1/2" rust proof screws. The split is a bit unclear, but from what I can see I think its a shake (longitudinal split) Which won't reduce the load bearing capacity, by and large, but you could screw it/them together, having first drilled both a clearance and pilot hole, in the usual way, and countersink. Don't try to pull the split fully closed if it resists as it's the depth rather than the thickness of rafter that's bearing the weight, also each rafter (to each side of a split one) will be taking a portion of the load...pinenot
P.S. what's the white stuff, paint?
OK, the crack is simply through one knot..not serious.. simply screw a suitable steel plate (galvanized hold down bar or similar) with 2" - 2 1/2" rust proof screws. The split is a bit unclear, but from what I can see I think its a shake (longitudinal split) Which won't reduce the load bearing capacity, by and large, but you could screw it/them together, having first drilled both a clearance and pilot hole, in the usual way, and countersink. Don't try to pull the split fully closed if it resists as it's the depth rather than the thickness of rafter that's bearing the weight, also each rafter (to each side of a split one) will be taking a portion of the load...pinenot
P.S. what's the white stuff, paint?
qualified sources instruct to use subfloor adhesive rated apa-afg-01 to adhere roofing planks and gable support members for added strength during a hurricane. Insurance companies give discounts for such after inspection. While I was doing such a few years ago, I noticed that split, so i squired some in.
A/The shake doesn't require anything more than than screwing together enough to prevent any further opening, as I think I said the actual structural strength of the roof has hardly compromised overall, that is with one shake in one piece of timber. Yes if this was a new roof this rafter would discarded as it wouldn't comply with the standards, but shakes are not uncommon nor detrimental to roof structure, If you want, get a structural engineer to check it and give us the update of this. By the way, ask him about liquid applied glue, unless he's been to the USA I'll bet he's totally bewildered on that one 
...pinenot
...pinenot 
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