PeterW Posted June 22, 2017 Share Posted June 22, 2017 (edited) Question... I need a 300 x 38 ridge board as we have 200 x 47 rafters cut at 50 degrees. Getting anything that size is problematic so my question is can I laminate / biscuit joint 150 x 38 lengths to make a ridge board at 300 depth ...?? I am thinking biscuits at 300 centre's and D4 along the joint with staggered joints between lengths. Thoughts..? Edited June 22, 2017 by PeterW Tags Link to comment Share on other sites More sharing options...
Construction Channel Posted June 22, 2017 Share Posted June 22, 2017 cant see why not, you could probably get away with just winding a load of 250mm timberlocks through it but biscuits and glue would probably be better 1 Link to comment Share on other sites More sharing options...
Crofter Posted June 22, 2017 Share Posted June 22, 2017 What about an engineered joist? Probably overkill but it would be nice and straight/level. You can get a 47x300 but not down to as narrow as 38mm. Link to comment Share on other sites More sharing options...
ProDave Posted June 22, 2017 Share Posted June 22, 2017 2 sheets of 18mm OSB glued and screwed together? Link to comment Share on other sites More sharing options...
PeterW Posted June 22, 2017 Author Share Posted June 22, 2017 Thought about a few of those options - OSB is one and even considered using 4x1 and 11mm OSB to create a laminated box beam. It's not structural so I'm not going to huge expense ..! Link to comment Share on other sites More sharing options...
Barney12 Posted June 22, 2017 Share Posted June 22, 2017 3 hours ago, PeterW said: Question... I need a 300 x 38 ridge board as we have 200 x 47 rafters cut at 50 degrees. Getting anything that size is problematic so my question is can I laminate / biscuit joint 150 x 38 lengths to make a ridge board at 300 depth ...?? I am thinking biscuits at 300 centre's and D4 along the joint with staggered joints between lengths. Thoughts..? I think I'd add some nail plates (spaced so they're between the rafters) too. For a sake of a couple of quid it's belt and braces. Link to comment Share on other sites More sharing options...
Russell griffiths Posted June 23, 2017 Share Posted June 23, 2017 If you laminated 3 layers instead of 2 you could stagger the joints more 3 x12mm ply fully glued would be massively strong. Many different ways to achieve this all probably perfectly strong enough as you say it isn't carrying a load. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now