SIST EN 12446:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Abgasanlagen - Bauteile - Außenschalen aus BetonConduits de fumée - Composants - Enveloppes externes en bétonChimneys - Components - Concrete outer wall elements91.100.30Beton in betonski izdelkiConcrete and concrete products91.060.40Dimniki, jaški, kanaliChimneys, shafts, ductsICS:Ta slovenski standard je istoveten z:EN 12446:2011SIST EN 12446:2011en,fr,de01-oktober-2011SIST EN 12446:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12446
June 2011 ICS 91.060.40 Supersedes EN 12446:2003English Version
Chimneys - Components - Concrete outer wall elements
Conduits de fumée - Composants - Enveloppes externes en béton
Abgasanlagen - Bauteile - Außenschalen aus Beton This European Standard was approved by CEN on 25 May 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations 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 CEN-CENELEC Management Centre or to any CEN member.
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Test methods . 16 Heat stress resistance and heat shock test . 16A.1 16 Apparatus . 16A.1.1 16A.1.2 Test assembly . 16SIST EN 12446:2011

Requirements of sampling plan according to ISO 2859-1 at an Acceptable Quality Level (AQL) and inspection level S2 Inspection Procedure . 24B.1 Acceptability determination . 24B.1.1 General . 24B.1.2 Single sampling . 24B.1.3 Double sampling . 24B.2 Normal inspection . 24B.3 Reduced Inspection . 26B.4 Reduced to normal inspection . 26B.5 Tightened inspection . 26B.6 Tightened to normal inspection . 27B.7 Discontinuation of inspection . 27Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 28ZA.1 Scope and relevant characteristics . 28ZA.2 Procedure of attestation of conformity of concrete outer wall elements . 29ZA.2.1 System of attestation of conformity . 29ZA.2.2 EC Certificate and Declaration of conformity . 31ZA.3 CE Marking and labelling . 31Bibliography . 34 SIST EN 12446:2011

Key H Internal height Figure 1 — Internal height 3.7 manufacturer's declared structural height maximum safe constructional height of the outer wall elements as declared by the manufacturer 3.8 manufacturer's declared overall wall thickness dimensions at its thinnest point, between the inside face and the outside face of the outer wall element, not measured at any joint feature, e.g. spigot/socket end 3.9 outer wall element with handling reinforcement outer wall element having steel reinforcement to assist handling and transportation 3.10 solid wall outer wall element outer wall element without cavities in the thickness of its walls SIST EN 12446:2011

concrete that is cast in a place other than its final location of use [EN 1858:2008] 4 Materials
4.1 General Outer wall elements shall be made of pre-cast concrete. Materials shall be identified for factory production control purposes. NOTE Additions can include glass or steel fibres. 4.2 Reaction to fire Attention is drawn to the Commission Decision 96/603/EC, as amended, in which non-combustible masonry units containing not more than 1 % by mass or volume (whichever is the more onerous) of homogeneously distributed organic materials are classified as reaction to fire class A1 without testing. 5 Reinforcement for handling Where an outer wall element is reinforced for handling, the reinforcement shall have a maximum diameter of 8 mm and a minimum concrete cover of 15 mm on all sides for temperature classes up to and including T 250 and 20 mm on all sides for all other temperature classes. In outer wall elements having a bulk density of less than 2 000 kg/m3, when measured according to A.10 of EN 1857:2010, any reinforcement shall be protected against corrosion by one of the following means: a) use of stainless steel conforming to the requirements of EN 10088-2; b) by completely covering any mild steel reinforcement conforming to the requirements of EN 10218-2 with a coating (e.g. Portland cement CEM I or CEM II mixed with water to form a slurry, or epoxy resin). 6 Surface treatment Any surface treatment of the outer wall element, e.g. render, coating, shall be applied as described by the product manufacturer, prior to testing. SIST EN 12446:2011

a) Declared internal transverse dimensions below 300 mm: ± 3 mm 300 mm and above:
± 1,5 % b) Declared height below 300 mm ± 5 mm 300 mm to 700 mm: ± 7 mm above 700 mm: ± 10 mm c) Declared overall wall thickness below 10 mm: 21+− mm 10 mm to 40 mm : 51,5+− mm above 40 mm: 125+− % 7.4 Squareness of ends When tested in accordance with either procedure described in A.3 of EN 1857:2010, the permissible deviation from squareness of ends of concrete outer wall elements shall not be greater than 10 mm at 'G' for the first procedure. With the second procedure the deviation shall not be more than 5 mm at 'G' for elements up to 400 mm and 8 mm at 'G' for elements greater than 400 mm in height. SIST EN 12446:2011

30 min ± 1 min, the element shall subsequently meet the requirements of 8.4. When an outer wall element has multiple passages with an equal wall thickness, the heat shock test shall be carried out on the passage with the highest temperature designation. NOTE The test described in A.1.4 is the method used to assess the sootfire resistance. 8.2.2 Bends or fittings, made of the same material mix and by the same method of manufacture as the tested straight outer wall element, shall be deemed to conform to 8.2.1. 8.2.3 Outer wall elements, made of a different material mix or using a different method of manufacture from those described in 8.2.2, shall be checked for heat shock resistance by testing a special straight test sample in accordance with 8.2.1. This straight test sample shall be made using the same material mix and manufacturing method as the outer wall elements. 8.2.4 The maximum temperature measured on the surface of adjacent combustible materials shall not exceed 100 °C when related to an ambient temperature of 20 °C, when test assembly is tested at the test temperature of 1 000 °C over a period of 30 min. The manufacturer shall declare the distance to the combustible partition and whether the gap between the outer wall element and the adjacent combustible partition is opened or closed. This distance shall not exceed the distance determined as described in 8.1.5. 8.3 Thermal resistance Thermal resistance shall be measured according to the method given in A.4 of EN 1858:2008 (reference method) or calculated according to the method given in Annex C of EN 1858:2008 and the value obtained declared. 8.4 Compressive strength 8.4.1 When tested as described in A.8 of EN 1857:2010, straight outer wall elements shall withstand an intensity of loading equivalent to 4 times the manufacturer's declared structural height before subjecting the element to the thermal performance test(s) and three times the manufacturer's declared structural height after subjecting the element to the thermal performance test(s). 8.4.2 Outer wall element bends and fittings made of the same material mix and by the same method of manufacture as the tested straight elements shall be deemed to conform to 8.4.1. 8.4.3 Outer wall elements made from a different material mix, or using a different method of manufacture from those described in 8.4.2, shall be checked for compressive strength by testing a special straight test sample in accordance with 8.4.1. This special straight test sample shall be made using the same material mix and manufacturing method as the bend or fitting. 8.5 Bulk density When outer wall elements are tested as described in A.10 of EN 1857:2010, the lowest and highest bulk density value shall be within a tolerance of ± 10 % of the manufacturers declared bulk density for the outer wall element. 8.6 Freeze-thaw resistance Where national regulations require freeze/thaw resistance of wall elements, they shall be tested in accordance with EN 14297. The product shall not present any damage of type 7, 8, 9 and 10 in accordance with EN 14297:2004, Table 1. SIST EN 12446:2011

Key 1 top of chimney excluding any terminal or chimney pot 2 last point of support Figure 2 — Explanation of last point of support Alternatively, the free standing part of the outer wall element above the last lateral support shall withstand a wind load of 1,5 kN/m2 (or a value according to national regulations) when tested in accordance with A.2. 8.8 Gas tightness of passages used for combustion air The gas tightness of the passage of an outer wall element, which is to be used for the air supply duct of a room sealed chimney application, shall be at least N2 (as defined in EN 1857) when measured after thermal testing. The gas tightness test shall be carried out in accordance with A.3. 8.9 Resistance to fire external to external Where national regulations require resistance to fire external to external (see EN 1443) of outer wall elements, they shall be evaluated and declared in accordance with those regulations. 8.10 Dangerous substances Materials used in products shall not release any dangerous substances in excess of the maximum permitted levels specified in a relevant European Standard for the material, or permitted in the national regulations of the member state of destination. SIST EN 12446:2011

NOTE An example of a designation system is given in Figure 3.
EN 12446
- T 120 (P)
- O(20)
-
Mi The number of this standard Flue gas temperature class (see 9.2) Pressure class application (see 9.3) Resistance to fire class G or O (see 9.4) followed by a distance to combustible material (xx) (see 9.5) Manufacturer’s information class Mi or Mn (see 9.6) Figure 3 — Example of a designation system 9.2 Temperature classes The temperature class shall be as specified in EN 1443. 9.3 Pressure class application The pressure class signifies the heat flow used for thermal testing of the outer wall element, i.e:  N for negative pressure conditions;  P for positive pressure conditions;  H for high positive pressure conditions. 9.4 Soot fire resistance class The soot fire resistance class, which shall conform to EN 1443, shall be as follows:  O for outer wall components tested without soot fire conditions;  G for outer wall components tested with soot fire conditions. 9.5 Distance to combustible materials The distance to combustible materials shall be as specified in EN 1443. The designation of the distance of the outer surface of the wall components shall be given as xx, where xx is the distance in mm for the tested temperature class and sootfire conditions. SIST EN 12446:2011
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