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1、 ATIS-0600006.2006 MECHANICAL STRUCTURAL ISSUES A AMERICAN MERICAN N NATIONAL ATIONAL S STANDARD FOR TANDARD FOR T TELECOMMUNICATIONSELECOMMUNICATIONS ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards f
2、or the information, entertainment and communications industry. More than 250 companies actively formulate standards in ATIS 20 Committees, covering issues including: IPTV, Service Oriented Networks, Home Networking, Energy Efficiency, IP-Based and Wireless Technologies, Quality of Service, Billing a
3、nd Operational Support. In addition, numerous Incubators, Focus and Exploratory Groups address emerging industry priorities including “Green”, IP Downloadable Security, Next Generation Carrier Interconnect, IPv6 and Convergence. ATIS is the North American Organizational Partner for the 3rd Generatio
4、n Partnership Project (3GPP), a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications Sectors, and a member of the Inter-American Telecommunication Commission (CITEL). For more information, please visit . AMERICAN NATIONAL STANDARD Approval
5、 of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been r
6、eached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The use of American Nationa
7、l Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institut
8、e does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for
9、 interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken
10、periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Notice of Disclaimer other references include ANSI EIA/TIA 569 guideline. ATIS-0600
11、006.2006 5 Electronic equipment heat dissipation loads are presently so high that they must be distributed in equipment rooms to allow adequate building cooling. Space planning activities must consider the heat load and building cooling configuration to maintain temperature balance. Equipment weight
12、 must be considered under space planning activities to avoid overloading floor load capacities. Stacking of equipment into framework could concentrate very heavy equipment weights onto a small footprint. Floor load design capacity should be understood and equipment weight distributed to avoid overlo
13、ad. Aisle dimensions may be impacted by building code or fire/safety requirements. The Americans With Disabilities Act is another document that may influence aisle dimensions. All code requirements must be strictly adhered to. Administrative space assigned in an equipment building should be limited.
14、 Fire protection code requirements for occupied space may require fire suppression systems be provided. The fire suppression systems could present risks to equipment due to accidental release. 5.2 Equipment Frame Floor Loading An individual frame should be limited to a floor load of 560 kg/m2 (114.7
15、 lb/ft2). The floor load for an equipment frame is calculated by dividing the frame weight by the area of a rectangle bounded by the extended frame sides and the center line of the standard front 762 mm or (2 ft 6 in) and rear 610mm or (2ft.) aisles. In addition to the 560 kg/m2 (114.7 lb/ft2) equip
16、ment frame load, there is a 50 kg/m2 (10.2 lb/ft2) transient load. Floor loading in DC power rooms may be greater due to storage batteries and DC power equipment. Floor designs for power rooms have typically been required to be rated 300 lb/ft2 to adequately support this equipment. Floor load capaci
17、ty will need to consider ceiling loads if the building floor has lower story floors and will be used for overhead equipment. Cable rack loads, superstructure loads, and building services loads suspended from the ceiling may add up to 20 lb/ft2 to building floor. 6 ANCHORING Securing equipment to a b
18、uilding assures reliability of network service due to manmade and natural hazards. Unsecured equipment could experience risks for overturning, equipment walking, or movement. Equipment movement may be a result of ground motions from natural disasters, inadvertent impact, vibrations excited by buildi
19、ng-mounted rotating devices, or outside of building activities. Equipment securing typically means, as a minimum, the equipment frame should be secured to the building by positive mechanical means. Securing could include floor anchoring, overhead securing, wall securing, or bracing to other structur
20、es. Equipment securing may be required by building codes in high seismic risk locations. It should be recognized that building code requirements are intended to protect occupants from risks of overturning equipment. Network reliability considerations require equipment securing beyond occupant safety
21、 to maintain service reliability. ATIS-0600006.2006 6 The securing methods required depend upon the stability of equipment configuration, mass of equipment, weight distribution, and external loads acting on equipment. Securing methods also rely on building structural surfaces available to secure equ
22、ipment. Building floors are usually the most common building surface available for securing equipment. Floor anchoring systems should be considered based on suitability of material, installation ease, performance, and applicability to site conditions. Floor anchoring systems vary greatly and great r
23、isks to equipment may result in choosing incorrect system. The anchor manufacturers installation requirements must be followed carefully to assure the performance of anchoring system. Anchor loads should be determined in choosing the correct anchor type, size, and quantity. Depending on loads, the l
24、oad must be matched to the anchor that provides the performance necessary. Anchor performance is typically provided in values for ultimate loads and allowable loads. Reasonable safety factors should be considered when choosing anchors. 6.1 Anchor Performance Anchor systems shall be listed products t
25、o appropriate building code such as the Uniform Building Codes. Verification of anchor system performance may be conducted by static load tests and/or dynamic tests when seismic loads are expected at sites where equipment will be located. Tests shall be conducted on anchor systems configured as the
26、anchors will be applied. Anchors shall be embedded in reinforced concrete to the manufacturers recommended depth, diameter hole, and in concrete with compressive strength nominally rated at 3000 psi. Anchor pullout (tensile) performance shall not be less than 95 percent of manufacturers rated ultima
27、te strength. 7 FIRESTOPPING All penetrations in fire-rated walls, floors, or other structural elements shall be firestopped to meet the rating of the floor or wall with UL approved requirements and using UL rated systems. All firestopping shall be developed and installed systems per ASTM E 814. All
28、firestopped penetrations shall be smoke-sealed to the appropriate facility requirement. 8 SEISMIC CONSIDERATIONS Equipment, frameworks, and cable rack designs and installation practices shall consider the environment in which they will be deployed. For some site locations, there may be greater risk
29、for earthquake activity and those loads may have an impact on the physical integrity of equipment, framework and cable rack. Site seismic risks are discussed in various sources such as the International Conference of Building Officials document Uniform Building Code, Telcordia Technologies document
30、GR-63-CORE, NEBS Requirements: Physical Protection, or conditions as determined by specific site engineering studies. ATIS-0600006.2006 7 If it is determined that a site is at risk for earthquake loads, equipment, framework, and cable rack shall be designed and installed to accommodate those loads.
31、The industry has used the Uniform Building Code method of determining site risks with Zone designations 0, 1, 2, 3, or 4. Sites located in UBC Zones 3 and 4 are likely to experience strong ground motions; therefore, equipment, framework, and cable rack designs and installation methods must be design
32、ed for those loads. Other zones are less likely to experience strong ground motions, but building and floor movement is still possible and some measure of protection may be warranted. Seismic loads may be triggered by manmade disturbances such as demolition activities, construction activities, roadw
33、ays, or out of balance rotating devices. Strong wind storms may also cause building movement. While these forces are typically of lower amplitude, the ground motions they generate could pose problems for equipment, framework, or cable rack systems that have not been secured adequately. Equipment des
34、igns can be demonstrated to be resistant to earthquake loads by conducting tests to ATIS-0600329.2008, Network Equipment Earthquake Resistance, or Telcordia Technologies GR-63-CORE, NEBS Requirements: Physical Protection. Framework designs tested for Zone 4 service are available from manufacturers a
35、nd have been tested to specified mounted equipment weights. While industry-wide practices have not been developed for cable rack and auxiliary framing systems to Zone 4 requirements, there is best practice documentation available from manufacturers and service providers. Service providers will indic
36、ate whether they require their equipment, framework, and cable rack systems to be designed for earthquake resistance. 9 FRAMEWORKS This standard, when used with established common metal manufacturing practices, sets forth dimensional parameters, performance requirements, and acceptance criteria for
37、the manufacture and availability of equipment frames used to house telecommunications equipment. These frames are intended for installation in telecommunications and data equipment buildings and facilities. The purpose of this standard is to establish common dimensional footprints for telecommunicat
38、ions frameworks, provide frames for network equipment, and to establish design parameters for developing future telecommunications equipment. Frames should be available as a general-purpose product for use by those electronic equipment manufacturers that do not design and manufacture their own propr
39、ietary framework. The frames should be available to service providers that require a common dimensioned frame for housing electronic equipment from a variety of manufacturers. Frameworks must be designed and manufactured per EIA 310-D, section 1. The purpose of this section is to establish requireme
40、nts for general-purpose equipment frameworks with industry-compatible dimensions and minimum performance capabilities. The frameworks shall provide consistent external dimensions for planning and engineering equipment areas in telecom facilities. Manufacturers will utilize the requirements for desig
41、ning and providing telecommunications providers and suppliers with industry-compatible equipment frameworks. Electronic equipment manufacturers will utilize dimensional parameters in the development of products to be housed in the frameworks. Integrators will utilize the framework to supply systems
42、composed of either their own equipment or third-party equipment to service providers. Service ATIS-0600006.2006 8 providers may plan telecom facility equipment areas based on the dimensions of the variety of frameworks. Minimum performance parameters have been developed for frameworks to assure cons
43、istent load carrying capabilities and resistance to external loads. The framework provides protection from aisle traffic for equipment and rear cabling by establishing consistent external dimensions. 9.1 Applications Telecommunications equipment is typically located in an equipment room separated fr
44、om administrative space, tenant occupied space, and space shared with non-telecommunications equipment. The equipment rooms are provided with cable management systems, room cooling equipment, and telecommunications/data equipment housed in frameworks placed in long parallel lineups across the room.
45、Lineups are separated by aisles 2 to 4 deep, providing equipment access and equipment cooling. Equipment may be installed in frameworks of 11-6”, 9-0”, or 7-0” height with the 7-0” height being the most common Cable management is available above the equipment frame. Cable racks are supported on auxi
46、liary framing suspended from the ceiling and placed in parallel runs in front and back of equipment lineups. Room cooling air and lighting is provided by overhead ducts and fixtures directed down onto equipment. Ducts for room cooling occupy up to 4 feet of overhead clearance from a typical 14 feet
47、overall ceiling height. Electronic equipment is installed in frameworks by mounting brackets secured to uprights. The uprights of framework are provided with regularly spaced mounting holes to permit equipment placement anywhere along vertical height of uprights. Future applications may include inst
48、allation of frameworks on raised floor systems. Floor systems may be provided for cable routing and/or air plenum duty. Provisioning frameworks for cable access will be necessary to accommodate cable entry and exit. The intent of this clause applies to the design and construction of general-purpose
49、frameworks (two post or 4 post designs) for mounting electronic equipment shelves from various manufacturers that do not design and manufacture their own proprietary framework. Proprietary designed frameworks may or may not be in conformance to requirements herein and are more usually designed in compliance to internal company performance parameters. This clause is not intended to preclude the deployment of telecom equipment installed in these proprietary frameworks. Typical application guidelines for using frameworks described in this section are for: Use b