Guide the sections as they overlap.

Top section guides
Guide components connect the travel of the adjacent sections. The leaves remain parallel as the gate extends or retracts; they do not fold on hinges.

Wheels along the sections
The original detail shows the cast-aluminium wheel assemblies below adjacent sections. This ground-running support differs from the large head wheel shown on D-18.

Lower wind guide
The lower guide device keeps the moving section engaged with its travel line. This structural feature is not a stated wind-load certification.


