Are you cutting 20 ft Strut to 6 ft lengths?
Many contractors take a 20’ length section of strut and cut it to just over 6’ long for some overhang on each side. Conklin stocks and sells 6’8” long strut as a labor saving option.
Why 6’8”? Because 20’ divided by 3 = 6.7”
The 6’8” option is for those contractors buying 20’ lengths and cutting it to that size themselves.