Programming Documents for Pre-K for SA - The City of San Antonio
Programming Documents for Pre-K for SA - The City of San Antonio
Programming Documents for Pre-K for SA - The City of San Antonio
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8. Support Structures<br />
8.1 General<br />
Support structures are necessary to allow installation <strong>of</strong> telecommunications wire, cable, connecting<br />
hardware, and associated apparatus. <strong>The</strong>ses structures comprise components such as equipment racks,<br />
cabinets, distribution rings, hangers, J hooks, plywood backboard, cable trays, conduits, slots, sleeves,<br />
and their associated hardware.<br />
8.2 Pathways<br />
8.2.1 General<br />
When installing pathways, it is important to ensure that the route <strong>for</strong> the pathways are clear <strong>of</strong><br />
obstructions, such as heating, ventilation, and air conditioning HVAC ducts, large pipes, and<br />
structural beams within the building. Whenever fire barriers are penetrated, they shall be<br />
firestopped to maintain the fire rating <strong>of</strong> the barrier.<br />
Determine the entire route <strong>of</strong> a pathway be<strong>for</strong>e installation <strong>of</strong> supports. <strong>The</strong> route shall be<br />
surveyed prior to installation to ensure that obstacles are avoided. For example, if a wall<br />
penetration cannot be established, then the work done to install the support hardware may have<br />
to be repeated or modified to get to another location. Penetrations through fire rated walls and<br />
floors should be accomplished be<strong>for</strong>e installing the hangers, clamps, and trapezes. Once the<br />
pathway and cables are installed, firestop the penetrations.<br />
8.2.2 Cable Trays<br />
This section addresses the installation <strong>of</strong> a cable tray within a telecommunications room (TR),<br />
equipment room (ER) or entrance facility (EF). However, the principles involved can be<br />
applied to installing cable trays between telecommunications spaces (e.g., TR, ER, EF) and as<br />
horizontal or backbone pathways.<br />
Cable trays may be installed on single or multiple levels. Corners and changes in horizontal<br />
plane are accomplished by using sections <strong>of</strong> cable tray cut from standard stock and connected<br />
together with manufacturer specified hardware. <strong>The</strong> connecting hardware permits all angles,<br />
both vertical and horizontal, to be accommodated over the entire route <strong>of</strong> the cable tray.<br />
Cable trays shall be wall mounted or supported by the building structure from above using all<br />
threaded rods (ATR) and manufacturer specified attachments. ATR shall be installed using<br />
properly sized anchors and correct attachment hardware. Select the ATR to support the<br />
maximum load <strong>for</strong> which the cable tray is designed.<br />
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