Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Stacked Floor Joists

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Title: Stacked Floor Joists

I have been on vacation and just read this thread and offer the following paradox.

Stacked members may share the same deflection, but does this mean they share the same bending moment? If the members stay in contact, then the member on the concave side necessarily has a smaller radius of curvature and should have slightly higher bending moment than the lower member. (Remember 1/R = M/EI from basic mechanics?) So if the moments arent the same, how can the deflections be the same? Thats the paradox.

Jim Lutz, P.E., S.E.

720 3rd Avenue, Suite 1200

Seattle, WA 98104-1820

206 505 3400 Ext 126

206 505 3406 (Fax)