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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12056-3:2000 The Eu
2、ropean Standard EN 12056-3:2000 has the status of a British Standard ICS 91.060.20; 91.140.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Gravity drainage systems inside buildings Part 3: Roof drainage, layout and calculation Licensed copy:RMJM, 29/08/2005, Uncontrolled Co
3、py, BSI This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 September 2000 BSI 09-2000 ISBN 0 580 36486 0 BS EN 12056-3:2000 Amendments iss
4、ued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12056-3:2000. It supersedes BS 6367:1983 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee B/505, Wastewater engineering, t
5、o Subcommittee B/505/21, Roof drainage and sanitary pipework, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related interna
6、tional and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. The national annexes are an informative element of this standard and contain information provided to support easier implementation of
7、EN 12056-3:2000 in the United Kingdom, within the framework envisaged by the scope of that standard. They therefore constitute a revision of those parts of BS 6367:1983 that are not otherwise superseded by BS EN 12056-3:2000. However, users are reminded that only the normative elements of the adopte
8、d European Standard set out the provisions to which it is necessary to conform in order to form part of a trade description when citing this British Standard by number or when compliance with it is claimed. Cross-references The British Standards which implement international or European publications
9、 referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a
10、 contract. Users of British Standards are responsible for their correct application. Additional information It is recognized that Figure 2, Figure 3, Figure 4 and Figure 11, along with the logic diagrams contained in annex D, are of poor quality. This has been reported to CEN in a proposal to correc
11、t them in the Engish language version of EN 12056-3:2000. Until the standard is corrected, which BSI is not authorized to do, it is strongly recommended that these figures be used with care. Textual errors The textual errors set out below were discovered when the English language version of EN 12056
12、-3:2000 was adopted as the national standard. They have been reported to CEN in a proposal to amend the text of the European Standard. Note 1 to Figure 8 should refer to Table 8, rather than Table 7. Note 3 to Figure 8 should refer to Table 8, rather than Table 7. Compliance with a British Standard
13、does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 83 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed copy:
14、RMJM, 29/08/2005, Uncontrolled Copy, BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12056-3 June 2000 ICS 91.060.20; 91.140.80 English version Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculation Rseaux dvacuation gravitaire lintrieur des btiments - Par
15、tie 3: Systme dvacuation des eaux pluviales, conception et calculs Schwerkraftentwsserungsanlagen innerhalb von Gebuden - Teil 3: Dachentwsserung, Planung und Bemessung This European Standard was approved by CEN on 27 October 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regula
16、tions which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This Eur
17、opean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the nat
18、ional standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES
19、KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12056-3:2000 E Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI Page 2 EN 12056-3:2000 BSI 09-200
20、0 Contents Page Foreword3 1Scope4 2Normative references5 3Definitions and symbols6 3.1Definitions6 3.2Symbols7 4Runoff calculations8 4.1Quantity of rainwater runoff8 4.2Rainfall intensity, r9 4.3Effective roof area, A10 5Hydraulic design11 5.1Eaves gutters11 5.2Valley and parapet gutters14 5.3Gutter
21、 outlets19 5.4Flat roof outlets21 6Rainwater pipes26 6.1Part filled (non-siphonic systems)26 6.2Siphonic systems27 6.3Drains28 6.4Connection to sanitary pipework28 7Layout29 7.1General29 7.2Gutters29 7.3Outlets29 7.4Emergency outlets29 7.5Access29 7.6Pipework29 7.7Trace heating30 7.8Change of buildi
22、ng use30 ANNEX A (NORMATIVE) TESTING OF GUTTERS AND OUTLETS31 A.1Capacity of gutter and outlet in combination31 A.2Capacity of gutter32 A.3Capacity of gutter outlet32 ANNEX B (INFORMATIVE) NATIONAL AND LOCAL REGULATIONS AND PRACTICE33 ANNEX C (INFORMATIVE) CAPACITY OF DRAINS38 ANNEX D (INFORMATIVE)
23、LOGIC DIAGRAMS39 Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI Page 3 EN 12056-3:2000 BSI 09-2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 165 “Waste water engineering“, the secretariat of which is held by DIN. This European Standard shall be given the
24、 status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2000, and conflicting national standards shall be withdrawn at the latest by June 2001. This part is the third in a series relating to the functional requirements of gravity draina
25、ge systems inside buildings. There will be five parts, as follows: Gravity drainage systems inside buildings Part 1:General and performance requirements Part 2:Sanitary pipework - Layout and calculation Part 3:Roof drainage - Layout and calculation Part 4:Waste water lifting plants - Layout and calc
26、ulation Part 5:Installation and testing, instructions for operation, maintenance and use According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finlan
27、d, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI ? ards organizatrganizat Austria, Belgium Belgium , Ireland, Italy, Land, Italy, L ? d and the Uni
28、tednd the United Page 4 EN 12056-3:2000 BSI 09-2000 1Scope This European Standard applies to wastewater drainage systems, which operate under gravity. It is applicable for drainage systems inside dwellings and commercial, institutional and industrial buildings. This third part of this European Stand
29、ard describes a method of calculating the hydraulic adequacy of non-siphonic roof drainage systems and gives performance requirements for siphonic roof drainage systems. It also sets standards for the layout and installation of roof drainage insofar as they affect flow capacity. This part of this Eu
30、ropean Standard applies to all roof drainage systems where the outlets are large enough not to limit the flow capacity of the gutter (i.e. free discharge conditions). It applies to all materials used for roof drainage systems. Detailed information additional to that contained in this Standard may be
31、 obtained by referring to the technical documents listed in Annex B. Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI ? Page 5 EN 12056-3:2000 BSI 09-2000 2Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normativ
32、e references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated referenc
33、es the latest edition of the publication referred to applies. EN 12056-1:Gravity drainage systems inside buildings Part 1: General and performance requirements EN 12056-2:Gravity drainage systems inside buildings Part 2: Sanitary pipework, layout and calculation EN 12056-5Gravity drainage systems in
34、side buildings Part 5: Installation and testing, instructions for operation, maintenance and use Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI ? Page 6 EN 12056-3:2000 BSI 09-2000 3Definitions and symbols 3.1Definitions For the purposes of this European Standard, the following definitions a
35、pply: 3.1.1gutter angle deviation in gutter direction 3.1.2design water depth maximum depth of water under design rainfall conditions 3.1.3drainage length length of gutter from a stop end to an outlet or half the distance between adjacent outlets, in millimetres 3.1.4eaves gutter gutter where any sp
36、illover will discharge outside the building 3.1.5flat sole sole of the gutter, which is horizontal in cross-section for at least the width of the outlet 3.1.6freeboard total depth of gutter minus the designed water depth 3.1.7long gutter gutter whose drainage length is greater than 50 times its desi
37、gn water depth 3.1.8roof drainage of buildings all pipework and fittings outside and inside, fixed to or passing through the building structure, including drains below the building, to the point of connection to the buried drain adjacent to the building, used to remove precipitation from a roof (See
38、 Scope of EN 12056-1.) 3.1.9short gutter gutter whose drainage length is not greater than 50 times its design water depth 3.1.10siphonic drainage system drainage system in which the outlets and pipework enable the system to flow completely full under design conditions and make use of the total head
39、available between the outlets and the discharge point 3.1.11spillover level level at which water will overflow the gutter Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI ? utside and insideside and insid w the building, to thew the building, t remove precipitatiomove precipi gutterutter er wh
40、ose drainagwhose draina nic dric ? idth of the outlethe outle an 50 times its d0 times its Page 7 EN 12056-3:2000 BSI 09-2000 3.2Symbols For the purposes of this European Standard, the following symbols have been used: SymbolDescriptionUnitText reference Aeffective roof aream2Table 3 AEfull cross-se
41、ctional area of guttermm25.1.2 AWcross-sectional area of the gutter below the freeboardmm25.2.3 AOplan area of a gutter outletmm2Figure 8 BRwidth of roof from gutter to ridgemFigure 1 Crunoff coefficientdimensionless4.1 diinternal diameter of pipemmTable 8 Deffective diameter of a gutter outletmmFig
42、ure 9 DOactual diameter of a gutter outletmmFigure 9 ffilling degree of rainwater pipe which is equal to the proportion of cross-section of rainwater pipe filled with water dimensionlessTable 8 Fddepth factordimensionlessFigure 5 Fhoutlet head factordimensionlessFigure 10 FLcapacity factor for long
43、and sloping guttersdimensionlessTable 6 Fsshape factordimensionlessFigure 6 hhead at outletmmTable 7 HRheight of roof from gutter to ridgemFigure 1 hdwater depth in drainmmannex C ipipe or gutter gradientdimensionlessannex C kbeffective pipe roughnessmmTable 8 kOoutlet coefficientdimensionlessTable
44、7 Ldrainage length of gutter, i.e. length of gutter from a stop end to an outlet or half the distance between two adjacent outlets mmTable 6 LRlength of roof to be drainedmFigure 1 LSlength of sumpmmFigure 11 LKlength of taper of a gutter outletmmFigure 9 LWlength of weir over which water can flowmm
45、5.3.5 and Figure 12 Qrate of flow of waterl/s4.1 Qddrain capacityl/sannex C QLdesign capacity of “short“ gutter, laid levell/s5.1.2 QNnominal capacity of gutterl/s5.1.2 QOtotal flow to an outlet (calculated on area drained multiplied by the rainfall intensity) l/sTable 7 Licensed copy:RMJM, 29/08/20
46、05, Uncontrolled Copy, BSI Page 8 EN 12056-3:2000 BSI 09-2000 SymbolDescriptionUnitText reference QRWPcapacity of a rainwater pipel/sTable 8 QSEcapacity of an equivalent square eaves gutterl/s5.1.4 and Figure 3 QSVcapacity of an equivalent square valley or parapet gutter l/s5.2.3 Ris the radius of a
47、 gutter outletmmFigure 9 rrainfall intensityl/(s?m2)4.2 Swidth of gutter at solemmFigure 4 Twidth of gutter at designated water linemmFigure 4 TRdistance from gutter to ridge measured along the roofmFigure 1 Pwetted perimetermmannex A vflow velocitym/sannex C Wdesign water depthmmFigure 4 Ztotal dep
48、th of gutter to spillover level, including freeboard mmFigure 4 ?kinematic viscosity of waterm2/sannex C 4Runoff calculations 4.1Quantity of rainwater runoff The rate of flow of rainwater to be drained away from a roof under steady state conditions shall be calculated from equation 1: Q = r ? A ? C
49、(1) where Qis the rate of flow of water, in litres per second (l/s); ris the rainfall intensity, in litres per second per square metre l/(s ? m); Ais the effective roof area, in square metres (m); Cis a runoff coefficient (taken as 1,0 unless national and local regulations and practice state otherwise), dimensionless. Licensed copy:RMJM, 29/08/2005, Uncontrolled Copy, BSI Page 9 EN 12056-3:2000 BSI 09-2000 4.2Rainfall intensity, r 4.2.1Where ther