Two screws from top, two from bottom, forming a cross patten?
The beam thickness is about 2", so #10 7/8" screws should be good?
I planned to install just one 1/4" x 2 1/2" flat head machine screws, with a 1/4 x 1 1/4 fender washer and a 1/4 nyloc nut from bottom. Does this achieve the same...