Wood beam

Ok, I started doing Structural Framing in 89... a 3/4" hole is not an issue. But a 4x6 is... for load and span. As stated above, you would be better off with 2 2x's, with plywood in the middle, glued and bolted. We use 1/2" through bolts for residential. Or, as , above, but a variation, you could get some 1/4" angle steel... if I knew exactly what you were trying to do, i could help Ya design edit: gonna start fromthe Top and reread