Moment of Inertia - 18-inch deep 2x4 Modified Warren Flat Truss

[DCEngr1]

I have calculated the moment of inertia of a 2x4, 18-inch deep modified metal-plated flat truss as 1312.79 from standard "equal rectangle" formula in the AISC manual. Can someone tell me where to obtain wood floor truss section properties listed? I believe this looks correct. I am not into wood trusses, but I need to check some deflection figures. Hmmm.

Thank you for your assistance.

 

[dcarr82775]

SteelPE,

If you make a little truss in RISA, you get something close to the 85% number. Could have just been dumb luck on my part. I can never come close to matching the Mitek software deflections.