1、*USACE / NAVFAC / AFCESA / NASA UFGS-27 05 28.36 40 (August 2011)-Preparing Activity: NASA SupersedingUFGS-27 05 28.36 40 (November 2008)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2011*SECTION TABLE OF CONTENTSDIVISION 27 - COMMUNICATIONSSECTION 27 05
2、28.36 40CABLE TRAYS FOR COMMUNICATIONS SYSTEMS08/11PART 1 GENERAL1.1 REFERENCES1.2 ADMINISTRATIVE REQUIREMENTS1.2.1 Pre-Installation Meetings1.3 SUBMITTALS1.4 QUALITY ASSURANCEPART 2 PRODUCTS2.1 SYSTEM DESCRIPTION2.2 MATERIAL2.3 FABRICATION2.4 COMPONENTS2.4.1 SupportsPART 3 EXECUTION3.1 INSTALLATION
3、3.1.1 Manufacturers Instructions3.1.2 Installation Drawings3.1.3 Grounding- End of Section Table of Contents -SECTION 27 05 28.36 40 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-27 05 28.36 40 (August 201
4、1)-Preparing Activity: NASA SupersedingUFGS-27 05 28.36 40 (November 2008)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2011*SECTION 27 05 28.36 40CABLE TRAYS FOR COMMUNICATIONS SYSTEMS08/11*NOTE: This guide specification covers the requirements for mater
5、ials and installation of communication cable-tray systems.Contract drawings should indicate the extent and general arrangement of the cables, equipment, and distribution systems and should indicate cable-tray supports.Adhere to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Stand
6、ard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and r
7、equirements not required in respective project, whether or not brackets are present.Comments, suggestions and recommended changes for this guide specification are welcome and should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL1.1 REFERENCES*NOTE: This paragraph is used to list the
8、 publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections S
9、ECTION 27 05 28.36 40 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue dates.References n
10、ot used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the
11、 text by the basic designation only.ASTM INTERNATIONAL (ASTM)ASTM A1008/A1008M (2011) Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake HardenedASTM A123/A123M (2009) St
12、andard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel ProductsNATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA VE 2 (2006) Cable Tray Installation GuidelinesNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2011; TIA 11-1; Errata 2011) National Electrical Code1.2 AD
13、MINISTRATIVE REQUIREMENTS*NOTE: If Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS is not included in the project specification, applicable requirements therefore should be inserted and the following paragraph deleted.*Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS appli
14、es to work specified in this section.1.2.1 Pre-Installation MeetingsThe Contracting Officer will schedule a pre-installation meeting within 30 _ days of Contract Award. Submit the following for review and approval:a. Fabrication Drawingsb. Installation DrawingsSECTION 27 05 28.36 40 Page 3Provided b
15、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Submit manufacturers product data for the following items:a. Cable Traysb. Supports1.3 SUBMITTALS*NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the followin
16、g list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control.A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an exi
17、sting “G” if the submittal item is not complex and can be reviewed through the Contractors Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to three chara
18、cters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the District Off
19、ice); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.*Gover
20、nment approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control approval.for information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government.
21、Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsFabrication Drawings; G; G, _Installation Drawings; G; G, _SD-03 Product DataCable Trays; G; G, _SECTION 27 05 28.36 40 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without
22、license from IHS-,-,-Supports; G; G, _SD-08 Manufacturers InstructionsManufacturers Instructions; G; G, _1.4 QUALITY ASSURANCEComply with NEMA Standards Publication Number VE1, “Cable Tray Systems.“Comply with NEC, as applicable to construction and installation of cable tray and cable channel system
23、s (Article 392 NEC).Provide products that are UL-classified and labeled.PART 2 PRODUCTS2.1 SYSTEM DESCRIPTION Provide ladder cable trays consisting of two longitudinal side members connected by individual transverse members.Provide trough cable trays consisting of continuous one-piece ventilated-bot
24、tom sections contained within longitudinal side members.Provide channel cable trays consisting of one-piece ventilated channel sections.Provide solid bottom trays consisting of two longitudinal side members connected by one-piece bottom section.2.2 MATERIALProvide cable trays constructed of high-str
25、ength corrosion-resistant aluminum Alloy No. 5052-H32 steel in accordance with ASTM A1008/A1008M with a zinc coating applied after fabrication. Provide hot-dipped galvanized steel trays with finish in accordance with ASTM A123/A123M.Provide stainless steel tray with straight section and fitting side
26、 rails and rungs made of AISI Type 304 or Type 316. Weld transverse members (rungs) or corrugated bottoms to the side rails with Type 316 stainless steel welding wire.2.3 FABRICATIONSubmit fabrication drawings for cable trays consisting of fabrication and assembly details to be performed in the fact
27、ory.Prior to assembly, coat contact surfaces of trays with an antioxidant compound. Finish edges, fittings, and hardware free from burrs and sharp edges. Include splice and end plates, dropouts, and miscellaneous hardware.2.4 COMPONENTS2.4.1 SupportsPermit both vertical and horizontal adjustment, wh
28、ere possible on supports SECTION 27 05 28.36 40 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-and hangers. Provide an adequate bearing surface for the tray on the horizontal and vertical tray supports and have provisions for holddown clamps o
29、r fasteners. Provide a secure means other than friction for fastening cable trays to supports.Support cable trays at not more than 1800 _ millimeter 6 _ -foot intervals. Place supports for horizontal-elbow tray fittings within 600 _ millimeter 2 _ feet of each fitting extremity and as recommended by
30、 the cable-tray manufacturer.When supported at 1800 _ millimeter 6 _ -foot intervals, the cable trays shall be capable of carrying not less than 225 _ kilogram per meter 150 _ pounds per linear foot. Tray fittings shall have not less than the load-carrying ability of straight tray sections and have
31、the manufacturers minimum standard radius.PART 3 EXECUTIONComply with NEMA VE 2 for cable tray installation.3.1 INSTALLATION3.1.1 Manufacturers InstructionsSubmit manufacturers instructions for cable trays including special provisions required to install equipment components and system packages. Det
32、ail impedances, hazards and safety precautions.3.1.2 Installation DrawingsThirty _ calendar days prior to shipment, submit installation drawings to the Contracting Officer for approval. Coordinate drawings with all other work in the immediate area that could come in conflict with the installation. I
33、nclude layout of cable tray work and details of both horizontal and vertical supports as specified in paragraph entitled, “Supports,“ of this section.3.1.3 GroundingProperly grounded cable trays by means of a low-resistance conductor of sufficient capacity, but in no case smaller than No. 1/0 AWG co
34、pperNo. 3/0 AWG aluminum. Bond grounding conductor to cable-tray sections and fittings by compatible bolted connections. Consider cable tray sections in tandem assembly as having electrical continuity when these sections are bonded with appropriate high-strength bolts. Provide permanent and continuo
35、us effective grounding with an impedance sufficiently low to limit the potential above ground and to facilitate operation of overcurrent devices in the circuit. Provide grounding and bonding of cable trays in accordance with NFPA 70.- End of Section -SECTION 27 05 28.36 40 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
