Round table discussion of the advisory group on “How to ...€¦ · “How to overcome...
Transcript of Round table discussion of the advisory group on “How to ...€¦ · “How to overcome...
Round table discussion of the advisory group on
“How to overcome non-technological barriers”
Dipl.-Ing. Frank KoosEuroWindoor - The General Secretariat
Frankfurt a. M., Germany
http://www.eurowindoor.org
Best Practice For Double Skin FacadesDelphi, 12-19-2005
CE Marking for products - compulsory for building legislation
Initiated by Construction Products Directive (CPD)To show compliance with the Essential Requirements Based on harmonized European technical specificationLegal attestation of conformity in the form of
CE signifies that the product satisfies all the provisions of the CPD. It is fit for use as defined by Article 2(1) of CPD
EN 13830 Product standard - Curtain WallingBasis of CE mark/attestation of conformity
Framework for test and classification standardsLists specifications according to requirements of Construction Products DirectiveGives instructions to manufacturers:
Regulates scope of testing requiredSpecifies factory-production control and documentationSpecifies nature of marking
Leads to CE marking for curtain walling
Time Schedule EN 13830 “Product Standard Curtain Walling”
1.12.2005
Coexistence 1 year
2001 2002 2003 200620052004
Preparationfor Formal
vote
Formal vote
Publication as EN
Final draft
Publication in the EU OJ
Only CE
unexpected
Two examples of possible principles of curtain walling
Curtain Walling
Unitised constructionStick construction
Definitions
Curtain walling (EN 13830: 2003-11) -External building facade produced with framing mademainly of metal, timber or PVC-U, usually consisting ofvertical and horizontal structural members, connectedtogether and anchored to the supporting structure of thebuilding, which provides, by itself or in conjunction withthe building construction, all the normal functions of anexternal wall, but does not contribute to the load bearingcharacteristics of the building structure.
Double skin facade (prEN 13119: 2004) -A curtain wall construction comprising an outer skin ofglass and an inner wall constructed as a curtain wallthat together with the outer skin provide the full functionof a wall.
Regulated characteristics according to EN 13830
(Relevant for building authorities)
Reaction to fire
Thermal shock Resistance
Fire resistance
Resistance to live horizontal loads
Fire propagation
Air Permeability
Watertightness
Water vapour permeability
Resistance to dead load (self weight)
Thermal transmittance
Resistance to wind load
Airborne sound insulation
Resistance against impact
Durability
Classification of regulated product characteristics (I)
Characteristic/ designation
classification standard
Units Classification/value
Reaction to fire EN 13501-1
Class npd F E D C B A2 A1
Fire propagation npd verification, if required
Resistance to wind load EN 12179, EN 13116
kN/m² npd declared value
Dead load kN/m² npd declared value
Air permeability EN 12152 Class npd A1 A2 A3 A4 AE
(maximum test pressure) Pa (150) (300) (450) (600) (>600)
Water vapour permeability npd verification, if required
Watertightness EN 12154 Class npd R4 R5 R6 R7 RE
(maximum test pressure) Pa (150) (300) (450) (600) (>600)
Sound insulation EN ISO 140-3 and EN ISO°717-1, Rw (C;Ctr)
dB npd declared value
npd = no performance determined
Classification of regulated product characteristics (II)
Characteristic/ designation
classification standard
Units Classification/value
Thermal transmittance prEN 13947, Ucw
W/(m²K) npd declared value
Fire resistance (EN 13501-2)
Integrity (E)i → o, o → i, o ↔ i
min npd E 15 E 30 E 60 E 90 E 120
Integrity and insulation (EÌ)i → o, o → i, o ↔ i
min npd E 15 E 30 E 60 E 90 E 120
Integrity and radiation (EW)i → o, o → i, o ↔ i
min npd E 20 E 30 E 60
Resistance against impact EN 14019
internal Class npd I0 I1 I2 I3 I4 I5
(drop height) (mm) (n.a.) (200) (300) (450) (700) (950)
external Class npd E0 E1 E2 E3 E4 E5
(drop height) (mm) (n.a.) (200) (300) (450) (700) (950)
Thermal shock resistance Class npd verification, if required (Verglasung aus ESG,ESG-H TVG)
Resistance to live horizontal loads
kN at m sill hight
npd declared value
npd = no performance determined
Example: UCW for Double Skin Facade according prEN 13947: 2005, Annex D
secondary facade Ucw,2 = 6,0 W/m2K
primary facade Ucw,1 = 1,8 W/m2K
internalexternal
300 mm
slightly ventilatedlayer cw,2
sessicw,1
cw 111
URRR
U
U+−+−
=
0,6104,009,013,0
8,11
1
+−+−=
= 1,6 W/(m²·K)
For Information: UCW will change with prEN 13947: 2005
Ψg taken from EN ISO 10077-1: 2005, Annex E will rise and therefore input data for UCWo UW for windows will rise about 0,1 W/(m²K)o Ψm,g and Ψt,g will rise up to more then 100%
Additional Ψm,f and Ψt,f between façade framing and included windows must be addedThis lead to:
UCW,new ≅ UCW,old + 0,2
CE marking of curtain wallingExample from product standard EN 13830: 2003-11
01234
CE conformity marking, consisting of the “CE” symbol given in directive 93/68/EEC Identification number of the certification body (where relevant)
Any Co. Ltd, PO Box 21, B-1050
02
01234 –CPD-00234
Name or identifying mark and registered address of the producer Last two digits of the year in which the marking was affixed Certificate number (where relevant)
EN 13830
Curtain wall product Intended to be used in City Office application
Reaction to fire - Classes
Fire resistance - NPD
Watertightness - class R6
Resistance to own dead load - kN
Wind load resistance - 1200 kN/m²
Impact resistance - Technical classes
Thermal shock resistance - Glass type
Resistance to horizontal load - kN at m sill height
Thermal transmittance - NPD
Air permeability - class A3
Airborne sound insulation - dB
Number of European standard Description of product Information on regulated characteristics
Classification of voluntary product characteristics
Characteristic/ value/dimension
classification standard
Classification/value
Seismic shock resistance
npd verification, if required
Building and thermal movement
npd verification, if required
Equipotentiality EN 13830 Annex A
Ohm
npd declared value
Watertightness under dynamic conditions EN 13050
npd verification, if required
Bullet resistance In the style of EN 1522
npd FB1 FB2 FB3 FB4 FB5 FB6 FB7 FSG
Explosion resistance In the style of EN 13123-1 or -2
Shock tube npd EPR1 EPR2 EPR3 EPR4
Range test npd EXR1 EXR2 EXR3 EXR4 EXR5
Burglar resistance In the style of ENV 1627
Class npd 1 2 3 4 5 6
npd = no performance determined
Conclusion
There is already legal regulation for double skin facades in forceWith CE marking classes and declared values for regulated characteristics are givenThese legal declaration must be basis for any following planning tool or calculationAll characteristics of façade are important and have to be taken into accountAdvantages of double skin facades should not be limited to energy effectsPlease do the research with the newest standards in order to get future-proof results