Deflection of non-metallic cable tray can be adversely affected by _ġ6. If a cable tray system will be subjected to thermal expansion and contraction, expansion splice plates must be considered during the installation T/Fġ5. Pre-galvanizing is the most widely used coating for steel cable tray. fittings are subject to NEMA/CSA load ratings T/Fġ3. Aluminum is often the material of choice for cable tray installations because it _ (is corrosion resistant in certain environmnents, is lightweight, has a high strength-to-weight ratio, is maintenance free, is nonmagnetic)ġ2. Lengths of straight sections of cable tray are generally manufactred in which of the following lengths (10', 12',20',24',25')ġ1. NEMA VE 2 addresses which of the following (handling, load capacity, maintenance, modification, shipping, storing)ġ0. USE ONLY AS A MECHANICAL SUPPORT FOR CABLES., or noneĩ. Each cable tray fitting must be marked with which of the following ( manufacturer's name or trademark, type of material, "WARNING DO NOT USE AS A WALKWAY, LADDER,OR SUPPORT FOR PERSONNEL.
Covers for cable trays should generally be installed _ (in a vertical tray run accessible by pedestrian & vehicular traffic, where falling objects may damage cables, outdoors, all)Ĩ.
A cable tray having openings on the bottom sufficient for the passage of air and utilizing 75% or less of the plan area of the surface to support cables is known as a _ħ. Cable trays containing conductors rated over 600 volts must have a permanent, legible warning notice carrying the wording "DANGER-HIGH VOLTAGE-KEEP AWAY" placed in a readily visible position on all cable trays. _ specifies the requirements for fiberglass cable trays and associated fittings designed for use in accordance with the requirements of the NECĤ A _ is a prefabricated metal structure consisting of two longitudinal side rails connected by individual transverse membersĥ. (aluminum, stainless steel, pre-galvanized steel, hot-dip galvanized steel, all of the above)ģ. A cable tray system is defined as a system of raceways and associated fittings used to securely fasten or support cables. Sometimes for appearance or at the end of the header beam where the standard flange out will not fit.Code and Pract ch 4 Introduction to cable tray systems Questionġ. JH24IN – an inverted flange or concealed flange hanger is installed the same way except the inverted flange is now hidden/concealed behind the end of the joist. JH24 – tie brackets nailing flange faces out (away from the joist) so the hanger can be nailed to the header beam then the joist is set into the hanger. 2” x 4” lumber finished dimension is l.5” x 3.5”) so a JH24 structural connector actually measures 1.625+ to allow for dimensional anomalies in the lumber industry. Tie brackets are typically sized for US dimensional lumber (i.e. PowrFab structural connectors are manufactured in Newport, Oregon USA and provide 316L stainless compatible bolts, lags, nails, screws and wedge anchors for installation. 316L stainless steel is an extra low carbon version of 316 stainless steel and ideal for heavy gauge welding application as well. Our Powrfab 316L stainless steel brackets are the answer for a lasting product. PowrFab tie brackets are manufactured using marine grade 316L stainless because it is resistant to rust, marine environment corrosion and chemical treated woods which are extremely corrosive to steel and galvanized brackets. PowrFab tie brackets not only simplify the framing process but also strengthen the deck or project you are building. These structural connectors are specifically used for decks, fences, sidewalks, walkways, boardwalks, piers, boat docks, stairways, foundations, flooring, framing and many other projects. Use ranges from complex marine applications (docks – ramps – piling connections – handrails), government facility projects, new commercial or renovation construction, new home construction to remodel projects. PowrFab Solid Stainless Brackets including tie brackets are manufactured from premium grade marine grade 316L stainless the most corrosion resistant available for a variety of applications and customers.
Each plate has twenty 3/16″ diameter nail holes. The overall dimensions are 3″ x 6″ flat plate.
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