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Rack Requirements

The device can be installed in a rack. Many types of racks are acceptable, including four-post (telco) racks and open-frame racks. An example of an open-frame rack is shown in Figure 23.

The following sections describe rack requirements:

Rack Size and Strength

The device is designed for installation in a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association (http://www.eia.org).

With the use of adapters, the device is designed to fit into a 600-mm-wide rack, as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (http://www.etsi.org). Use approved wing devices to narrow the opening between the rails.

The rack rails must be spaced widely enough to accommodate the device chassis's external dimensions: 14.0 in. (35.6 cm) high, 24.5 in. (62.2 cm) deep, and 17.45 in. (44.3 cm) wide. The spacing of rails and adjacent racks must also allow for the clearances around the device and rack that are specified in Clearance Requirements for Airflow and Hardware Maintenance.

In general, a center-mount rack is preferable to a front-mount rack because the more even distribution of weight in the center-mount rack provides greater stability.

For instructions about installing the mounting hardware, see Installing the Mounting Hardware.

The chassis height of 14.0 in. (35.6 cm) is approximately 8 U. A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association. You can stack five SRX 5600 services gateways in a rack that has at least 48 U (84 in. or 2.13 m) of usable vertical space.

The rack must be strong enough to support the weight of the fully configured device, up to 163.5 lb (74.2 kg). If you stack five fully configured devices in one rack, it must be capable of supporting up to 818 lb (371.0 kg).

Figure 23: Typical Open-Frame Rack

Image g001011.gif

Spacing of Mounting Bracket Holes

The device can be mounted in any rack that provides holes or hole patterns spaced at 1 U (1.75 in.) increments. The mounting brackets used to attach the chassis to a rack are designed to fasten to holes spaced at those distances.

Connection to Building Structure

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets. For more information, see Rack-Mounting Requirements and Warnings.

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