2.
Using a sheet metal screw, because of its
squared shoulder; put the screw in the center of the
horizontal hole.
|
3. Do not
tighten the screw. Leave it approximately 1/4 to 1/2 turn
loose.
|
4. When all
the screws are in the track you should be able to wiggle
horizontally a small distance.
|
5. Now the track
is able to expand or contract with temperture changes, and
shouldn't buckle or warp. |