 and put it against the old beam, and then glue them together and bolt them together. Don't nail them, but screw them or bolt them together. And basically, that new beam acts as a splint, and it supports the weight that the old beam was supporting. And, of course, I hope you also had the house treated for termites at the same time. Otherwise, you'll be doing this again and again and again. All right, Ed. Good luck with that project, and hopefully you can keep that moss from coming back.