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3G Modular Access System Assembly Manual Page 52 of 77
5.5. TWO-LINE CLOSURE LOWER RAIL
5.5.1.
Locate a platform closure bracket. Clamp the closure bracket to the ramp handrail post such that
the short leg is centered on the lower Two-Line ramp handrail and aligned with the post. Orient
the bracket so the long leg is on the same side as and parallel to the platform post (FIG. 5.10).
5.5.2.
Measure the gap between the long leg of the closure bracket and platform post (FIG. 5.11).
5.5.3.
Trim the 1-1/2” diameter round tube to the measured gap length less 1/8” to account for the
threaded inserts which will be installed after trimming (FIG. 5.12).
5.5.4.
Using a metal file, smooth all sharp edges from trimming the round tube.
5.5.5.
Install 5/16”-18 round threaded inserts into both ends of the trimmed tube. Use a rubber
mallet or similar tool to fully seat the threaded inserts (FIG. 5.12).
5.5.6.
Install 5/16”-18 x 1” hex bolts through 5/16” flat washers, the slot in the long leg of the
closure bracket, and the third hole from the top of the platform post, into the threaded
inserts installed in the previous step, then tighten all fasteners securely (FIG. 5.12).
5.5.7.
Unclamp the closure bracket and drive a 5/16”-18 x 1-1/4” self-drilling, self-tapping hex washer
head screw, centered in the slot, through the platform closure bracket and into the ramp handrail
post. Tighten securely but use caution not to overtighten and strip the threads. (FIG. 5.12).
FIG. 5.10
FIG. 5.11
FIG. 5.12
1-1/2” DIAMETER TUBE TRIMMED
TO FIT GAP LESS 1/8”