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    ASHRAE 160 ADD C-2012 Criteria for Moisture-Control Design Analysis in Buildings.pdf

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    ASHRAE 160 ADD C-2012 Criteria for Moisture-Control Design Analysis in Buildings.pdf

    1、ANSI/ASHRAE Addendum c toANSI/ASHRAE Standard 160-2009Criteria forMoisture-ControlDesign Analysisin BuildingsApproved by the ASHRAE Standards Committee on June 23, 2012; by the ASHRAE Board of Directors on June 27, 2012; and bythe American National Standards Institute on June 28, 2012.This addendum

    2、was approved by a Standing Standard Project Committee (SSPC) for which the Standards Committee has estab-lished a documented program for regular publication of addenda or revisions, including procedures for timely, documented, con-sensus action on requests for change to any part of the standard. The

    3、 change submittal form, instructions, and deadlines may beobtained in electronic form from the ASHRAE Web site (www.ashrae.org) or in paper form from the Manager of Standards. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE Web site (www.ashrae.org) or from ASHRAECustomer Ser

    4、vice, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: ordersashrae.org. Fax: 404-321-5478. Telephone:404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For reprint permission, go towww.ashrae.org/permissions. 2012 ASHRAE ISSN 1041-2336SPECIAL NOTEThis Americ

    5、an National Standard (ANS) is a national voluntary consensus standard developed under the auspices of ASHRAE.Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved thisstandard as an ANS, as “substantial agreement reached by direc

    6、tly and materially affected interest categories. This signifies the concurrenceof more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that aneffort be made toward their resolution.” Compliance with this standard is voluntary

    7、 until and unless a legal jurisdiction makes compliancemandatory through legislation.ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review.ASHRAE Standards are prepared by a Project Committee appointed specifically for the p

    8、urpose of writing the Standard. The ProjectCommittee Chair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, allmust be technically qualified in the subject area of the Standard. Every effort is made to balance the concerned interests on all Pr

    9、ojectCommittees.The Manager of Standards of ASHRAE should be contacted for:a. interpretation of the contents of this Standard,b. participation in the next review of the Standard,c. offering constructive criticism for improving the Standard, ord. permission to reprint portions of the Standard.DISCLAI

    10、MERASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information andaccepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components,or systems tested, insta

    11、lled, or operated in accordance with ASHRAEs Standards or Guidelines or that any tests conducted under itsStandards or Guidelines will be nonhazardous or free from risk.ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public

    12、by offering a uniform method of testing for ratingpurposes,bysuggestingsafe practicesindesigningandinstallingequipment,byprovidingproperdefinitionsofthisequipment,andbyprovidingother information that may serve to guide the industry. The creation of ASHRAE Standards and Guidelines is determined by th

    13、e need forthem, and conformance to them is completely voluntary.In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied,that the product has been approved by ASHRAE.ASHRAE Standing Standard Project Committee 160Cogni

    14、zantTC:TC 4.4, Building Materials and Building Envelope PerformanceSPLS Liaison: Charles Barnaby*Denotes members of voting status when the document was approved for publicationAnton Tenwolde, Chair* Achilles N. Karagiozis* Elbert G. Phillips*William B. Rose, Secretary* Hartwig M. Kunzel* Paul H. Shi

    15、pp*Lixing Gu* Wahid Maref* Raoul A. Webb*Jonathan Humble* Robert R. Marshall* Theresa A. Weston*Richard E. Peters*ASHRAE STANDARDS COMMITTEE 20112012Carol E. Marriott, Chair Krishnan Gowri Janice C. PetersonKenneth W. Cooper, Vice-Chair Maureen Grasso Douglas T. ReindlDouglass S. Abramson Cecily M.

    16、Grzywacz Boggarm S. SettyKarim Amrane Richard L. Hall James R. TaubyCharles S. Barnaby Rita M. Harrold James K. VallortHoy R. Bohanon, Jr. Adam W. Hinge William F. WalterSteven F. Bruning Debra H. Kennoy Michael W. WoodfordDavid R. Conover Jay A. Kohler Craig P. WraySteven J. Emmerich Frank Myers Ec

    17、khard A. Groll, BOD ExOAllan B. Fraser Ross D. Montgomery, COStephanie C. Reiniche, Manager of Standards ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.AN

    18、SI/ASHRAE Addendum c to ANSI/ASHRAE Standard 160-2009 1(This foreword is not part of this standard. It is merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not beenprocessed according to the ANSI requirements for astandard and may contain material t

    19、hat has not beensubject to public review or a consensus process.Unresolved objectors on informative material are notoffered the right to appeal at ASHRAE or ANSI.)FOREWORDSSPC 160 changes Section 4.6 as indicated below. Thechanges are limited to Table 4.6.1 and the explanation ofterms directly below

    20、 the table. The changes are meant tosimplify the calculation of wind-driven rain without signifi-cantly degrading the accuracy of the calculation. Becausethe calculation has large errors associated with it, the speci-ficity of the old table did not improve accuracy. There is alsoconsiderable uncerta

    21、inty about the effect of building heighton rain deposition.Note: In this addendum, changes to the current standardare indicated in the text by underlining (for additions) andstrikethrough (for deletions) unless the instructions specifi-cally mention some other means of indicating the changes.Modify

    22、the standard as follows.4.6 Design Rain Loads on WallsB-15Design rain loads must be determined for walls exposedto rain. In the absence of a comprehensive wind-driven rainanalysis, the amount of rain striking a vertical surface shall becalculated using the following equation:B-16(4-6)whereFE= rain e

    23、xposure factorFD= rain deposition factorFL= empirical constant, 0.2 kgs/(m3mm) SI, 0.46lbh/(ft2miin.) I-PU = hourly average wind speed at 10 m (33 ft)height, m/s (mi/h)= angle between wind direction and normal to thewall (See Figure 4.6.1)rh= rainfall intensity, horizontal surface, mm/h (in./h)rbv=

    24、rain deposition on vertical wall, kg/(m2h) SI,lb/(ft2h) I-PThe exposure factor, FE, is influenced by the topographysurrounding the building and height of the building. Recom-mended values are given in Table 4.6.1.B-17Addendum c to Standard 160-2009rbvFEFDFLU cos rh =Figure 4.6.1 Plan view of buildin

    25、g with definition of wind angle to exposed wall.Table 4.6.1 Exposure FactorBuilding Height, m (ft)Type of TerrainSevere Medium Sheltered50 (164) 1.5 1.5 1.5 ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not p

    26、ermitted without ASHRAEs prior written permission.2 ANSI/ASHRAE Addendum c to ANSI/ASHRAE Standard 160-2009Severe exposure includes hilltops, coastal areas, andfunneled wind. Sheltered exposure includes protection byshelter from trees, nearby buildings, or a valley other perma-nent moderating featur

    27、es.The following deposition factors shall be used:a. Walls below a steep-slope roof: FD = 0.35 b. Walls below a low-slope roof: FD = 0.5c. Walls subject to rain runoff: FD=1.0B-18TABLE 4.6.1 Exposure FactorBuilding Height, m (ft)Type of Exposure CategorySevere Medium Sheltered10 and 20 (33 and 66) 1

    28、.4 1.2 1.0 20 ( 66) 1.5 1.5 1.5 ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.POLICY STATEMENT DEFINING ASHRAES CONCERNFORTHE ENVIRONMENTAL IMPACT OF ITS

    29、 ACTIVITIESASHRAE is concerned with the impact of its members activities on both the indoor and outdoor environment. ASHRAEsmembers will strive to minimize any possible deleterious effect on the indoor and outdoor environment of the systems andcomponents in their responsibility while maximizing the

    30、beneficial effects these systems provide, consistent with acceptedstandards and the practical state of the art.ASHRAEs short-range goal is to ensure that the systems and components within its scope do not impact the indoor andoutdoor environment to a greater extent than specified by the standards an

    31、d guidelines as established by itself and otherresponsible bodies.As an ongoing goal, ASHRAE will, through its Standards Committee and extensive technical committee structure,continue to generate up-to-date standards and guidelines where appropriate and adopt, recommend, and promote those newand rev

    32、ised standards developed by other responsible organizations.Through its Handbook, appropriate chapters will contain up-to-date standards and design considerations as the material issystematically revised.ASHRAE will take the lead with respect to dissemination of environmental information of its prim

    33、ary interest and will seekout and disseminate information from other responsible organizations that is pertinent, as guides to updating standards andguidelines.The effects of the design and selection of equipment and systems will be considered within the scope of the systemsintended use and expected

    34、 misuse. The disposal of hazardous materials, if any, will also be considered.ASHRAEs primary concern for environmental impact will be at the site where equipment within ASHRAEs scopeoperates. However, energy source selection and the possible environmental impact due to the energy source and energyt

    35、ransportation will be considered where possible. Recommendations concerning energy source selection should be made byits members. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.ASHRAE 1791 Tullie Circle NE Atlanta, GA 30329 www.ashrae.org7/12


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