1、*USACE / NAVFAC / AFCESA / NASA UFGS-07 72 00 (August 2009)-Preparing Activity: USACE SupersedingUFGS-07 72 00 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2009*SECTION 07 72 00ROOF VENTILATORS, GRAVITY-TYPE08/09*NOTE: This guide specification c
2、overs the requirements for gravity-type roof ventilators including stationary, turbine, and ridge types.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 info
3、rmation and requirements not required in respective project, whether or not brackets are present.Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization de
4、signation and telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to i
5、n 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 Reference Article to automatically place the reference in the Reference Article. Also use the R
6、eference Wizards Check Reference feature to update the issue dates.SECTION 07 72 00 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-References not used in the text will automatically be deleted from this section of the project specification whe
7、n 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 text by the basic designation only.AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)ASCE 7-05 (2006; Errat
8、a 2007) Minimum Design Loads for Buildings and Other StructuresASTM INTERNATIONAL (ASTM)ASTM A 653/A 653M (2009) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip ProcessASTM B 209 (2007) Standard Specification for Aluminum and A
9、luminum-Alloy Sheet and PlateASTM B 209M (2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)ASTM B 221 (2008) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and TubesASTM B 221M (2007) Standard Specification for Aluminum
10、 and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)SHEET METAL AND AIR CONDITIONING CONTRACTORS NATIONAL ASSOCIATION (SMACNA)SMACNA 1793 (2006) Architectural Sheet Metal Manual, Sixth Edition, Second Printing1.2 DESIGN REQUIREMENTS*NOTE: To determine the ventilator size and p
11、erformance requirements, the latest ventilator manufacturers recommendations should be used, including latest ASHRAE Handbook “Fundamentals“ published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers.*Design ventilators for use with the specific type of project roofin
12、g system, and to provide uniform and continuous air flow. Ventilator design shall provide protection against rain and snow, and shall be provided with a continuous weep along the bottom of both sides of wind band. Units shall be self-cleaning by the action of the elements, and shall have provisions
13、SECTION 07 72 00 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-for carrying water and normal wind-transported soil matter to the outside. Design units for windspeeds of not less than 36 _ m/second 80 _ mph in accordance with ASCE 7-05. Ventil
14、ators shall be free of internal obstructions or moving parts which will require maintenance, and shall be complete with type of mounting indicated on drawings.1.3 SUBMITTALS*NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to re
15、flect 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 existing “G” if
16、 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 characters within
17、 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 Office); “AO“ f
18、or 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.*Government approv
19、al is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control approval. information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. Submit the foll
20、owing in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsRoof Ventilators; G; G, _Dimensioned drawings indicating location of each type of ventilator including details of construction, gauges of metal, and methods of operation of dampers and controls.SECTION 07 72 00 Page 3P
21、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.4 QUALITY ASSURANCEManufacturer shall specialize in design and manufacture of the type of roof ventilators specified in this section, and shall have a minimum of _ years of documented successful experi
22、ence. Provide a ventilator installer experienced in the installation of ventilator types specified.1.5 DELIVERY, STORAGE, AND HANDLINGRoof ventilators shall be cartoned or crated prior to shipment. Protect ventilators from moisture and damage. Remove damaged items from the site.PART 2 PRODUCTS2.1 MA
23、TERIALS*NOTE: Materials selected for ventilators will be based on the degree of permanence of the installation. Typically, aluminum will be used for permanent-type installation, and galvanized steel will be used for a temporary nature. For special situations where appearance is important, or resista
24、nce to specific corrosive conditions is required, special paint type coatings are available from manufacturers. Manufacturers literature should be reviewed to specify special coatings.*2.1.1 Aluminum ExtrusionsAluminum extrusions shall be alloy 6063, temper T5 in compliance with ASTM B 221M ASTM B 2
25、21.2.1.2 Aluminum SheetsAluminum sheets shall be alloy 5005, temper H15 or alloy 3003, temper H14 in compliance with ASTM B 209M ASTM B 209.2.1.3 Galvanized Steel SheetsSteel sheets shall be commercial quality, zinc-coated steel (hot-dip galvanized) of quality established by ASTM A 653/A 653M, minim
26、um G90 coating thickness.2.2 RIDGE VENTILATORSProvide roof ridge ventilators fabricated of galvanized steel aluminum, and assembled to any desired length. Continuous-run ridge ventilators shall be connected with splice plates of type which will telescope together and not require fasteners, soldering
27、 or welding. Provide ventilators with manually-operated single-leaf dampers complete with accessories to meet design and performance requirements. UL labeled fire-actuated damper system complete with accessories to meet building code requirements. Dampers and airshafts shall be complete with urethan
28、e gasketing for extra-tight enclosures. Provide metal closure strips, which match the panel roof rib contours, to close out weather and provide a secure seat for ventilators. Insect Bird screens shall be provided.SECTION 07 72 00 Page 4Provided by IHSNot for ResaleNo reproduction or networking permi
29、tted without license from IHS-,-,-2.3 STATIONARY VENTILATORS*NOTE: Review building code requirements to determine if no damper or manually-operated dampers are acceptable. If dampers must meet fire code requirements, carefully review code and ventilator manufacturers data before editing this spec.*P
30、rovide stationary roof ventilators fabricated of galvanized steel aluminum with seamless spun conical-shaped weathercap, and having straight-through drainage for eliminating the possibility of air-borne debris collecting in the ventilator openings. Insect Bird screens shall be provided.2.4 TURBINE V
31、ENTILATORSProvide turbine ventilators fabricated of galvanized steel aluminum corrugated flat sheets, complete with sensitive ball-bearing action to enable the slightest motion of air to move the rotor head where suction is maintained at low wind velocities. Ventilators shall have 360 degree operati
32、ng surface to assure access of wind currents regardless of wind velocities. Rotor head shall be anchored to prevent head from lifting or jumping off the rotor in high winds. Rotor crown plate shall be seamless. Bird Insect screens shall be provided.2.4.1 DampersTurbine ventilators shall be provided
33、with dampers manually-operated with direct pull-chain or rack and pinion push-button control electric gear motor-operated dampers thermostat control electric gear motor-operated dampers.2.4.2 Rotor ShaftRotor shaft bearings shall be entirely shielded in corrosion-resistant aluminum casing. Bearings
34、shall be pre-lubricated and shall have life-time warranty. Bearings shall be at top and bottom to assure accurate alignment. Shaft and bearings shall be easily replaceable as a unit. Rotor collar shall be rolled and welded.2.5 FABRICATIONVentilators shall be fabricated in accordance with approved sh
35、op drawings. Welds, soldered seams, rivets and fasteners shall be clean, secure, watertight, and smooth. Edges shall be wired or beaded, where necessary, to ensure rigidity. Joints between sections shall be watertight and shall allow for expansion and contraction. Galvanic action between different m
36、etals in direct contact shall be prevented by nonconductive separators.2.6 CURB BASES*NOTE: Delete this paragraph if flange-mounting is used.*Ventilator bases for curb-mounted installations shall be of size indicated SECTION 07 72 00 Page 5Provided by IHSNot for ResaleNo reproduction or networking p
37、ermitted without license from IHS-,-,-on drawings, and shall be designed specifically for the type of ventilator and roofing system approved for this project. Curb bases shall be factory-formed and flashed for a watertight installation. Curb bases shall be fabricated of material and finish to match
38、the ventilator.2.7 SCREENS*NOTE: Insect screens are typically required for ventilators in hospitals, mess halls, bakeries and similar buildings. Insect screens should not be used when exhausting noxious gases because insect screens will clog up. Bird screens should be used where insect screens are n
39、ot required. Edit as required.*Screens shall be furnished by ventilator manufacturer as part of ventilator assembly. Screen (with frames) shall be manufactured of material to match ventilators, and shall be designed to be easily removed for cleaning purposes.2.8 FINISH2.8.1 Galvanized Steel FinishGa
40、lvanized steel roof ventilators shall be factory-coated with rust-resistant primer and baked-on finish coats of acrylic finish coats to match metal roof panels two-coat high-performance coating system field-painted in accordance with Section 09 90 00 PAINTS AND COATINGS _.2.8.2 Aluminum FinishAlumin
41、um roof ventilators shall be factory-finished to match metal roof finish and color with two-coat fluoropolymer high-performance coating system _.2.8.3 ColorColor shall be in accordance with Section 09 06 90 COLOR SCHEDULE _.PART 3 EXECUTION3.1 PREPARATIONPrepare rough openings and other roof conditi
42、ons in accordance with approved shop drawings and manufacturers recommendations. Rough openings shall be field-measured and recorded on shop drawings prior to fabrication of roof ventilators. Before starting the ventilator work, protect surrounding roof surfaces from damage. Coordinate fabrication w
43、ith construction schedule.3.2 INSTALLATIONCoordinate roof ventilator installation with roofing work, and in accordance with approved shop drawings, manufacturers published instructions, and chapter 8 of SMACNA 1793. The ventilator installation shall be watertight and free of vibration noise. Protect
44、 aluminum surfaces SECTION 07 72 00 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-from direct contact with incompatible materials. Aluminum surfaces which will be in contact with sealant shall not be coated with a protective material. Aluminum shall not be used with copper or with water which flows over copper surfaces. Clean roof ventilators in accordance with vent
