I made the top U-channels from 6061 T6, 1 1/2 x 1/2 x .032 Top sheet metal is clecoed in place with piano hinges. Running a straight edge down the U-channel shows a sag of about 3/32 in the middle. Is this normal? My first reaction was to fab and rivet .032 doublers on the legs of the U-channel, thus forcing it straight. But maybe it simply isn't noticeable when all is done?
If I had noticed before riveting all the nutplates to the U-channel, I would have added a slight curve with the metal shrinker...too late now.
If I had noticed before riveting all the nutplates to the U-channel, I would have added a slight curve with the metal shrinker...too late now.
