First pic is straight on with finished look. This will help set the reference. Opening is big enough for sandals and tennis shoes. Not going to try fitting a pair of boots in there, but it does work for what we wanted...get the regular shoes we wear out of the doorway. I drilled a hole through the luan and then used a keyhole saw to cut out the opening. My Dremel battery was toast, so I had to revert to the manual saw.
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Now the camera is going into the open space in the photo on the bottom stair. You'll see the original stair framing. All I did was add a piece of plywood behind the framing to block off the bottom stair. I did this from inside the basement. Drill pilot holes for nails or screws. Stair framing is rock solid.
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Continue in with the camera on the next image and pan upwards. You can see the drawer bottom and how the framing along with the new plywood completely block in the space when the drawer is closed. Now all we need to do is put a rubber pan in place to catch water and debris.
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Final photo was taken by removing the drawer on 2d stair. I was trying to show how easy it was to simply scab in a piece of unfinished plywood to the frame from the basement side. You never even come close to seeing it, even when you enter the rig and it's more at eye level.
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