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

> PolyDrain > Installation > Suspension Method

Suspension Installation Method

This method of channel installation is ideal for retrofit installations (where parts of an existing slab must be removed for insertion of a trench drain) and other installations where brackets are not practical to use.

Channels are suspended from pre-drilled 2 x4 boards using 4-1/2" long bolts and toggle bars (properly positioned in the Red DOT PolyLock block) to securely support the channel while concreting. The 2 x 4 board must span the width of the trench and be supported by an existing finished surface (such as concrete or asphalt) or the boards may be supported by a structure of form work. In order to assure the grating will be slightly lower than the level of the surrounding concrete, insert shims (flat washers or wood shims at least 1/8" deep) on the top edge of both sides of the channel (between the board and the channel or frame). This will prevent puddling next to the drainage system and will aid in the positive flow of liquids into the channel.

Adjust the channel, sliding it forward or backward, to insure a tight connection between the tongue and groove butt joints at the channel ends. (Seal joints with appropriate sealant if required.)

Before placing concrete around the channel, be sure that all 2 x 4 boards are secured against channel flotation. To secure the boards, nail them to the original slab or weight the ends. If a single placement is desired, place 2 x 4 blocks under the 2 x 4 board at the channel edges and at the slab. Finished grade can then be troweled off with no obstruction.