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Complete Compiled Specification.pdf - Peck Ormsby Construction

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deflection exceeding 1/100 of the span. All edges of trays, rungs, and fittings shall be<br />

rounded and smooth. Corners shall have a 12" inside radius.<br />

C. Tray systems shall be supported by minimum 1/4-inch threaded steel rods fastened to<br />

connectors with 1/4-inch washer and nut. Right-angle connectors or T-connectors shall be<br />

used at 90 degree bends and crossings.<br />

1. Cable tray shall be supported maximum 8-foot on center.<br />

2. Cable tray support shall be via either wall brackets or trapeze support of connectors.<br />

Center hung support of the tray is prohibited.<br />

D. Accessories: Provide dropouts at terminal locations.<br />

E. At all rated and non-rated wall penetrations provide a permanent fire stop system as<br />

described below.<br />

1. The system shall consist of reusable heat expanding pillows or bags.<br />

2. The fire stop material shall be approved by Factory Mutual System and shall be<br />

Underwriters Laboratories classified and tested for use with both steel and aluminum<br />

cable tray. The penetration seal method and material shall have an Underwriters<br />

Laboratories fire rating equal to the wall or floor in which the openings are located.<br />

3. The penetration seal must allow future changes, such as addition or removal of<br />

cables, with no damage to the integrity of the seal.<br />

4. The seal method shall provide an immediate seal with no cure time.<br />

5. The penetration seal must be unaffected by atmospheric conditions, water exposure<br />

or constant high humidity.<br />

6. The fire seal shall be installed strictly according to the manufacturer/distributor<br />

published instructions.<br />

2.3 LADDER RACKS (IN TELECOM CLOSETS ONLY):<br />

A. Ladder rack as described below shall be used only in telecommunication rooms and closets.<br />

B. Provide all appropriate accessories including dropouts at terminal locations.<br />

C. Corners shall have a minimum 12" inside radius. Tee intersections do not need to be<br />

radiused.<br />

D. Ladder rack shall be firmly attached to the top of each free standing equipment rack that it<br />

passes over.<br />

PART 3 - EXECUTION<br />

3.1 INSTALLATION:<br />

A. Install cable tray to maintain 6 inches minimum clearance at top and sides of tray.<br />

Coordinate layout with work of other trades in advance of installation to provide required<br />

SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009<br />

CABLE TRAY 16115-2

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