Wood/Steel Composite Beam
Wood/Steel Composite Beam
(OP)
I have to design a beam that must span what a 2-2x12 beam could handle. How do I calculate what a 2-2x6 beam w/ a 1/4" steel plate sandwhiched in the middle can support. Thanks for the help in advance.
Devon
Devon





RE: Wood/Steel Composite Beam
Assume that in the first instance the load is taken by the timbers, the calculated proportion then being transferred from the timbers to the plate by the bolts over the main span, and then transferred back from the plate to the timbers at the bearings
Flitch beams have limited strength when analyzed about the minor axis. You MUST ensure that any flitch beam is provided with adequate lateral restraint.
See:
http://www.destefanoassociates.com/tech/flitch.pdf
http://www.toolbase.org/docs/MainNav/WoodFrameConstruction/2947_flitchplate.pdf
http://www.strucalc.com
Timber Construction Manual, AITC, 3rd ed
Design of Wood Structures, Donald E. Breyer, 3rd ed
RE: Wood/Steel Composite Beam
RE: Wood/Steel Composite Beam
A flitched beam 2-2x12 w 1/2 steel spacer fits in a stadard 4" wall cavity. Agree the steel takes the loading, but connections are critical.
RE: Wood/Steel Composite Beam
cheers
David Whitlock.
RE: Wood/Steel Composite Beam
Live load deflection = 5/384*[w(L**4) / (EI)]
gives us the functional inverse realtionship E * I and length to the fourth power