ABT, Inc. • PO Box 837 • 259 Murdock Road • Troutman, NC 28166
(800) 438-6057 • (704) 528-9806 • Fax: (704) 528-5478

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Installation

PolyDuct Utility Trench can be installed in new construction or retrofits, eliminating many of the steps and materials required with cast-in-place methods. The modular system components can be pre-assembled or installed in stages, depending on site conditions and overall depth.

While conditions and contractor methods may vary, the following suggest two installation methods.

The suspended method can be used to hang components into a saw cut in an existing slab or from form boards set to grade alongside the trench area. If pipe strut is being installed in PolyDuct, pre-assembled units can be hung from 2x4's by running a threaded rod down through the strut. If strut is not used, channels can be attached to suspending boards by tie-wiring the boards to bolts installed in the threaded channel inserts along the outside of the channel. The concrete encasement can then be poured in one or two stages.

The bedding method is the fastest method for new construction. Pull a string line to the desired grade and place a bedding of low slump concrete (4" minimum thickness) in the bottom of the prepared excavation. Position channel sections into the bedding end-to-end, bringing the top outside edge of the channel to the string line. Pull bedding concrete around lower anchoring ribs. After concrete bedding sets, sidewall sections can be installed if necessary, and the final pour can be made.