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Cable tray
Splice plat e
Fiberglass Cable Tray & Channel Installation Procedures
The following information shall be used as a guideline for installing fiberglass cable tray.
GLAS - Installation Procedures generous amount of FIBER-SEAL to the nut and bolt (inside surfaces and threads) just prior to assembly. Assembled splice joints should be tightened to approximately 12 ft/lbs. Tray sections should be joined using fiberglass encapsulated stainless steel nuts and bolts (Part #FECNBSS). For maximum protection in extremely harsh environments, apply a Special Considerations With few exceptions, the installation of fiberglass cable tray does not differ from that of metal tray. All standard installation practices and procedures apply. In general, special handling is not required. Tools Required Fiberglass tray is easy to cut and drill. For most installations, standard tools are sufficient; however, for large jobs where many sections require cutting and drilling, high speed steel tools may become dull due to the abrasiveness of glass. In such installations, the use of carbide tipped drills and abrasive (grit) saw blades is recommended. Cutting Tray in the Field Tray may be easily cut in the field using a standard hacksaw. If some type of power saw is used, abrasive grit-blades work best. When using a power saw, dust filter masks should be worn. Gloves and long sleeve clothing are also recommended. Sealing Edges All cut edges should be sealed In harsh environments; proper sealing ensures against future migration of corrosive elements into the cut sections. Drilling Holes for Splice Plates When drilling holes for splice plates, a ¹³/ 32 " drill bit will provide a properly sized hole. Clamp a splice plate (using a C-clamp) to the side of the tray and use this plate as a drilling template. The plate should be positioned to allow a 1⁄16" gap between joined side rails or fittings. Use of Encapsulated Hardware
Locating Splice Joints When possible, splice joints should be placed at or near the quarter point of any given support span. This is the point of least mechanical stress. For example: with a section of tray resting on supports spaced 20' apart, the splice plate joints should be located 5' from supports (support span divided by 4). Expansion Splice Plates Each fiberglass cable tray expansion splice plate allows 5⁄8" total expansion or contraction under varying temperature conditions. A complete table showing expansion plate placement intervals appears in the Fiberglass Splice plat e 500PU-200 FG bolt Cable tray side rail Accessories section of this catalog. Clamping & Securing Cable Tray Fiberglass cable tray provides a special hold down clamp (Part #HD4AB) which grips the bottom flange of the tray and prevents lateral movement. This clamp is commonly used to prevent lateral tray movement when long runs rest on I-Beams or other horizontal support members. Strut with 500 PU-CN strut nut installed FG washer HD4AB clamp Suppor t span 4
Splice plate joints should be located as close as possible to the qua rter point of the suppor t span
Suppor t span
Cable tray
HD4AB Clamps
Cable tray side rail
500PU-200 FG bolt
FG washer HD4AB clamp
For maximum stre use large diameter washers under bol
Strut with 500 PU-CN strut nut installed
The HD4AB may also be used to secure tray against a vertical wall or bulkhead. In such applications, the clamp should be located adjacent to and below a rung for extra support. When securing tray to a flat vertical bulkhead, it is also acceptable to drill and bolt directly through the bottom flange of the tray. Holes should be centered in the flange and kept as small as possible ( 3⁄8" diameter max). HD4AB Clamps
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