Thanks for the DuraRock information. Yes it will be tiled, but my tile contractor won't install marble unless he knows the floor deflection is 1/720 or less, even with the DuraRock.
I am also curious to find the formulas that work with partially center stiffened beams. I have been on-line and...
just to clarify, I was only able to calculate deflection based upon an 8' long span, unreinforced and then reinforced, only in this span lenght did I come up with the 1/00000", i.e. zero. I just can't actually calculate the deflection of the 21' span with only the center 8' reinforced. Can't...
Thanks for the quick responses, but adding more joist is not an option. I already talked to the manufacturer about this configuration and there's not a problem with it, as this is essentially how they tell you to reinforce their joist when cantilevering them. I already convinced myself that...
I have floor that is designed to 1/460 with TJI 360 engineered joist 11-7/8" tall with a 21 foot span, 16" o.c.. I want to increase stiffness to 1/720. I had planned to add reinforcing web sections using 1/2" OSB in the center of each span, but just 8 ft. long, the OSB would be structurally...
