Hubbell Polycast 600 Series, Channel Installation Alignment Chair, Zinc Plated Steel

The Polycast installation alignment chair is the most efficient and economical means of setting a
precast trench system. The installation chair supports the ends of the channels, aligns and
locks the joint rigidly together, and prevents the channels from floating.

The installation chair is attached by tightening the alignment bolts into the channel
"dimples". Two pieces of rebar are set every 4-feet to correspond with the channel joints,
placed through the connecting clamp on the installation chair, and driven into the subbase.
The channels are then aligned and adjusted to achieve the proper elevation.