Hello Everyone,

I am in the design stage of installing 10 foot long 5x7 white oak drop-in floor joists on a preexisting 11 foot long 10x11 white oak summer beam and I was wondering if there was a minimum drop in joist pocket depth? Looking at the "floor joist sizing rule of thumb" the depth should be less than or equal to 5/8ths of the width of the beam. Based on the spacing of the joists(31 inches on center) and the load each pocket will need to bear 715 lbs. I would prefer to make the smallest pocket possible because 1) I dont want to weaken the summer beam. 2) It's oak that's been drying for 10 years! I will be scoop cutting the floor joists down to 5 1/4 so my pocket dimensions will be 5 x 5-1/4 x depth... that's what I need help on! There will be 5 3/4 of wood underneath the joist pocket.

Thanks in advance!

Steve