Hello,
I am trying to model wood roofs for some of my models (wood joists with plywood sheathing, wood trusses). I am considering them semi-rigid, but I do not know what properties to use (Modulus of elasticity, Poisson's ratio, etc.).
Are there any recommended values to use for modelling these types of roofs?
Thank you.
There are a lot of variables like the plywood grade and nailing pattern, but I would start with the just the basic material properties of the plywood raw material. This is probably softer than the real system. Otherwise would need to determine some effective stiffness based on test results.
Are there any recommended values to use for plywood material?
It's a broad range. Here's a guide (rom APA) you might consult. https://www.trioforest.com/wp-content/uploads/2013/08/APA-Plywood-Design-Specs.pdf