Page 54 of 74
5.7.
TURN BACK CLOSURES
5.7.1.
There are three special closures available for filling the space between two ramps in a
turn back configuration. The Single-Line and Two-Line Turn Back Closures can be used
with platforms of any size but the 8’ x 5’ Vertical Picket Closure can only be used with
the 8’ x 5’ platform. Turn back closures can also be created using the methods
described in the proceeding sections by attaching the components to platform posts
between the ramps rather than directly from ramp handrail to ramp handrail.
5.7.2.
Regardless of style, first connect the ramp handrails by installing adjustable elbows in
the ramp handrails. Loosen the elbow assembly screws and position the adjustable
elbows so they are aligned with the elbow on the opposite side (but do not tighten),
and then measure the distance between the two larger round faces (FIG. 5.21).
5.7.3.
Cut a 1-
1/2″ diameter round tube to the measured gap (FIG.
5.21)
FIG. 5.21
FIG. 5.22
5.7.4.
Using a metal file, smooth all sharp edges from cutting the round tubes.
5.7.5.
Disassemble the adjustable elbows by removing the screw and nut (FIG. 5.4).
5.7.6.
Install an elbow half into each end of the cut tube (FIG. 5.4).
5.7.7.
Tighten the internal set screw using a T-handle Allen wrench or similar tool (FIG. 5.4).
5.7.8.
Reassemble the elbows by replacing center insert and securing with the screw and
nut (FIG. 5.5).
5.7.9.
Test to ensure all elbows are properly secured and attached. If needed, tighten
internal set screw in the closure elbow to secure more rigidly.
5.7.10.
Locate the platform closure brackets and attach the short leg of the brackets to the
lower holes in the ramp posts with 5/16″
-18 x 2-
1/4″ hex bolts, 5/16” flat washers
and 5/16″
-18 nuts (FIG 5.22). Orient the brackets so the long leg is on the same side
as and parallel to the bracket on the opposite side then tighten lightly (enough to
hold the brackets against the posts but still allow it to rotate).
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