American Audio VELOCITY - REV 4-05 Instructions d'exploitation télécharger pdf (Page 102)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-97 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

D. Underplatform Duct Banks

1. General

a. The Underplatform Duct Bank will consist of the following elements:

1) Conduits from the guideway cable through to the Cable Turning

Room (CTR). (Pulling irons are required in every CTR.) One group

of conduits from each guideway to a common CTR.

2) Conduits in the platform from the CTR to both the TC & C room and

the CTR at the opposite end of the station.

2. All conduits shall be imbedded in concrete. Two conduits, one from each

guideway cable trough to the CTR and thence to the TC & C room shall be

GRS. All others may be PVC. Spacers are required for PVC duct banks at

6-1/2” inch spacing.

Duct banks extending the length of the platform shall be uninterrupted and

as straight as possible, bends shall be gradual sweeps (factory sweeps) and

shall not exceed 180 degrees of bend, for the entire length of the cable run.

3. Conduits from the guideway cable troughs to the CTR or TC & C rooms shall

be uninterrupted and as straight as possible, bends shall be gradual sweeps

(factory sweeps) and shall not exceed 180 degrees of bend, for the entire

length of this cable run.

4. Exposed cable trays shall include protective metal covers. Use of exposed

trays shall be minimized.

E. Station Conduit Routing

Subsystem Devices of the same system within a station area shall be grouped

and routed to an Area-Junction Box. From this Area-Junction Box, all wires of

that subsystem will share an adequately sized common conduit, for wire routing

to the designated Communications Interface Cabinet (CIC).

1. Conduit routing of Subsystem Devices shall be configured as to reduce the

quantities of single conduits runs from devices to a Communications

Interface Cabinet (CIC) or to the TC & C room.

2. Subsystem Devices located in close proximity to the TC & C room may be

grouped and routed directly into the TC & C room. If these conduits enter

the TC & C room from overhead, they shall be located 11'-6" above the

finished floor or 6" above the room cable tray.

3. Conduit routing shall be configured to provide the routing path with the

fewest changes of direction.

F. Radio Antenna Sleeves and Conduit (For Subway Use)

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American Audio VELOCITY - REV 4-05 Instructions d'exploitation Page 102