I started off by cutting 45-degree miters in pine 1x5s to fit around the 16″x 60″ mirror Cutting a slots in the 1x5s for the mirror to slide into. Making multiple passes so it’s easier on the tablesaw. Used 90-degree angle brackets to assemble the frame. Slid the mirror in before assembling the last side. Cutting 45-degree miters in the 1.25″ square steel tubing. Tack-welding the steel frame while it’s in place around the wood frame to ensure a tight fit… Sanding up to 220-grit, then staining with 2 coats of Minwax Polyshades Espresso, hitting it with #000 steel wool between coats. Finishing up the welds (to the best of my ability!) Glamor-shot! (GO BRUINS) Using a grinding disc in my angle grinder to smooth out the welds, then hitting it with an 80-grit sanding disc. I should have been wearing a respirator or mask while doing this.. make sure you do if you’re grinding metal. To attach the wood frame to the steel frame, I used the same 90-degree brackets as before; however, they’re coated with zinc…. … which emits toxic fumes when welded, so I removed the zinc coating with a grinding disc. Welding on the brackets. Using a scrap piece of 1×5 to get the spacing right. Careful when welding on wood… It tends to catch fire…. Fitting it inside the steel frame. It sure was snug… maybe a little too snug, but it worked. I used 5/8″ screws in the angle brackets to attach it. Drilled some lag screws into studs to hang it. Done!