Beam formulas.
Beam formulas.
(OP)
I have not calculated a beam in 20 years and all of my books are out of reach. I am looking for the formulas to calculate bending moment on a simple beam supported at both ends with a uniform load combined with a point load in the center. This is to get preliminary sizing for a glulam beam spanning 25 feet, supporting the uniform load of the floor above and a point load from a column placed in the center of the span, which supports the ridge beam of the roof above that floor. My memeory says PL/4 & WL(SQUARED)/8
Also what is a source for moment of inertia tables for glulam beams? many tables size the beams by spacing, combined with span, for various floor loads/sq.ft., which is no help when there is a point load to be considered also.
Thanks
Also what is a source for moment of inertia tables for glulam beams? many tables size the beams by spacing, combined with span, for various floor loads/sq.ft., which is no help when there is a point load to be considered also.
Thanks






RE: Beam formulas.
I don't work with timber though so can't help you with the beam properties.
RE: Beam formulas.
RE: Beam formulas.
http://w
RE: Beam formulas.
Nothing for Glulams at WWPA.org
sorry.
RE: Beam formulas.
RE: Beam formulas.
I = bd^3/12
Section modulus, likewise.
S = bd^2/6
Modulus of Elasticity of a glued lam member depends on the species of wood used and combination of laminations.
All of these can be found in tabular form in the 1997 NDS supplement.
RE: Beam formulas.
not knowing much about the structural strength of wood products, what would Abelgus use as his allowable ? ... it doesn't sound like it's at WWPA.org ?
RE: Beam formulas.
24F-V4 compression side allowable bending stress is 1200 psi.
I am referencing from 1997 NDS. The latest edition should have the same values (I think).