Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
(OP)
Does anyone know of a known-successful method & procedure to add section to the bottom chord of a wood, metal-plated flat floor truss to decrease the deflection ?






RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
Mike McCann
MMC Engineering
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
Thank you.
Dana
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
But after that, it's a matter of increasing the Moment of Inertia. For a timber truss, the most efficient way to do this is to add steel plates to the top and bottom chords. Double the Moment of Inertia and you've cut the deflection in half. Just make sure the shear (that shear flow calculation that no one ever uses) is transferred from the timber to the steel along the chord.
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
I doubt if there is one for this span and depth (24' x 18") at 24" oc. Maybe adding 2x12 x 24' DF-L SS to each face of each truss would help to decrease the deflection enough. At least the contractor would be able to attach the 2x12's in the field. Doubt if they can move all the pipes, etc. to place them though.
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
Mike McCann
MMC Engineering
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection
RE: Reinforcing Bottom Chord of a Flat, Metal-plated Floor Truss To Decrease Deflection