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5.7.15. If installing a Single-Line Turn Back Closure the installation is complete.
5.7.16. If installing a Two-Line Turn Back Closure, a second 1-1/2″ diameter round tube is
installed in the second hole from the top of the ramp handrail posts in the same manner
as the curb at the bottom. The only difference is the platform closure brackets are
secured by installing the 5/16″-18 x 2-1/4″ hex bolts into the threaded inserts in the
lower ramp handrail rather than using a nut (FIG. 5.25).
FIG. 5.25
FIG. 5.26
5.7.17. The 8’ x 5’ Vertical Picket Closure can only be used with the 8’ x 5’ platform. If the ramps
have Vertical Picket or Horizontal Picket handrails, first remove the 5/16″-18 x 2-1/4″ hex
bolts and 5/16” flat washers from the uppermost rail and reinstall through the slots in the
8’ x 5’ Vertical Picket Closure brackets (FIG. 5.26). If the ramps have Single-Line or Two-
Line handrails, use the included 5/16″-18 x 2-1/4″ hex bolts and 5/16” flat washers with
5/16″-18 nuts inserted through the slots in the 8’ x 5’ Vertical Picket Closure brackets and
the uppermost hole in the ramp handrail post in a similar manner to FIG 5.22.
5.7.18. Attach the base of the 8’ x 5’ Vertical Picket Closure to the platform side rail using four
1/4″ x 1” long self-drilling screws (FIG. 5.26).
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