On the back side if the door use locking nuts to secure the steel.
How to build old style barn door.
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You can countersink the nuts in the back if you want them flush.
This will ensure that your door is square.
Sliding doors should extend at least an inch beyond the sides of the opening that don t have trim or an inch beyond the moldings of openings with trim.
Use a straightedge to mark a centerline down the door s two inset panels.
Measure from both corners of the door before screwing the middle rail to the stiles.
It s time to assemble the frame of the barn door.
To determine the door width add at least two inches to the width of the opening or to the outside dimensions of the door trim.
Next glue and screw the bottom mullion to the bottom rail and middle rail.
Fasten the left and right wheels to the door with 1inch wide steel.
To do this we started by gluing and screwing the bottom rail to both sides stiles.
Starting at the top rail butt the mitered ends of two pieces of similar thickness and color together at the centerline forming an arrow.