Wood flitch beam design
Wood flitch beam design
(OP)
Hello
i am designing one flitch beam. i have one 4x10 sawn lumber and trying to put one channel on each side.
does any body have any reference calculation for flitch beam.
i am designing one flitch beam. i have one 4x10 sawn lumber and trying to put one channel on each side.
does any body have any reference calculation for flitch beam.






RE: Wood flitch beam design
IMHO - I would just use the channels for moment, deflection and maybe shear calcs. Wood could also carry shear loads - assuming good connections. The wood beam with good anchors will mostly just add torsional stability. It makes the calcs much simpler and more conservative. If you go through all the calcs - You will find the wood does not help all that much.
RE: Wood flitch beam design
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RE: Wood flitch beam design
RE: Wood flitch beam design
Garth Dreger PE
AZ Phoenix area
RE: Wood flitch beam design
RE: Wood flitch beam design
BA
RE: Wood flitch beam design
RE: Wood flitch beam design
BA
RE: Wood flitch beam design
Here is an article describing the approach to design flitch plate beam, where both the wood and steel capacities are used in the calculation.
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Does anyone have a rule of thumb on how much extra capacity they can achieve using flitch plates, versus the wood section alone? I usually figure 1.5x is safe, and may be able to go up to 2x. Beyond 2x, I figure that it won't work, and look to increase the wood beam size.
That said, I typically only use flitch beams in renovation work, where we are dealing with existing conditions that somehow limit the use of deeper sections. In reno work, I have encountered the condition where I need to face mount a flitch beam to existing construction, which goes back to my point of using only the wood to transfer shear. In new construction, I rarely use them, preferring to go with an engineered wood section instead.