Frequently Asked Questions
Per the 2005 NDS®, which Emin should be used for the design of an unbraced structural glued laminated timber column under purely axial load?
Answer: Check both the weak axis and the strong axis and use the corresponding Emin for each axis. Eaxial is the longitudinal modulus of elasticity and is used only for calculations involving the change in longitudinal dimension of the member. For axial buckling calculations, Ex min or Ey min should be used as appropriate.
Wood Structural Issues
- Are there deflection limits for cantilevers?
- Where can I obtain information on construction tolerances?
- Where can I find information on wall bracing requirements at corners with openings?
- What is creep and how can I address it?
- How do I calculate a capacity for lumber sheathing or heavy timber decking diaphragms?
- What is the load duration factor (CD)?
- How do I design for notches in a bending member?
- Are there design values for shear perpendicular to grain?
- Are there span tables for cantilever beams?
- Where can I find criteria for vibration control for wood members?
- Where can I find information on designing wood frame structures for performance?
- Where can I find information on wood shrinkage?
- Is there a design method for increased buckling capacity of built-up wood beams?
- Does gypsum provide lateral support for wall studs?
- Per the 2005 NDS®, which Emin should be used for the design of an unbraced structural glued laminated timber column under purely axial load?
- NDS (2001/2005) Section 5.3.7 describes a specific loading scenario of "loaded parallel to the wide face of laminations" for application of the flat use factor, Cfu, for structural glued laminated timber. Does the flat use factor apply where eccentric column load induces moment in the y-y direction?