I have a problem and need the experience that I know is available here at the Creek. I have a house that is 120+ years old and has a sandstone foundation. I have a basement walkout that needs a door and door frame built. I dont know if I can attach the wood door frame I am going to build into the sandstones on the sides. I have a wooden header at the top, so that isnt a problem. I have a concrete bottom step. If I can attach a wooden threshold(just a 2x6) into the concrete bottom step, I can make a very solid frame by using pocket hole joinery. How can I bolt the 2x6 into the concrete step? Can the concrete be drilled? Or a construction adhesive? I have seen the devices that nail into concrete with a .22 caliber blank, but dont want to buy one just for 3 or 4 nails. Better would be a masonry bit. Or a tube of glue. Something economical. Thanks in advance.