SIST EN 12951:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prefabricated accessories for roofing - Permanently fixed roof ladders - Product specification and test methodsMontažna oprema za prekrivanje streh - Pritrjene strešne lestve - Specifikacija za izdelek in preskusne metodeAccessoires préfabriqués pour couverture - Echelles de couvreur solidement fixées - Spécifications des produits et méthodes d'essaisVorgefertigte Zubehörteile für Dacheindeckungen - Fest installierte Dachleitern - Produktanforderungen und PrüfverfahrenTa slovenski standard je istoveten z:EN 12951:2004SIST EN 12951:2005en97.14591.060.20ICS:SLOVENSKI
STANDARDSIST EN 12951:200501-marec-2005







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12951November 2004ICS 97.140English versionPrefabricated accessories for roofing - Permanently fixed roofladders - Product specification and test methodsAccessoires préfabriqués pour couverture - Echelles decouvreur solidement fixées - Spécifications des produits etméthodes d'essaisVorgefertigte Zubehörteile für Dacheindeckungen - Festinstallierte Dachleitern - Produktanforderungen undPrüfverfahrenThis European Standard was approved by CEN on 18 March 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12951:2004: E



EN 12951:2004 (E) 2 Contents Page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms, definitions, symbols and abbreviations.5 4 Materials.6 5 Dimensions and design requirements.6 5.1 General.6 5.2 Dimensions.7 5.3 Design.7 5.3.1 General design requirements.7 5.3.2 Additional design requirements for roof ladders type TA.7 6 Performance requirements.8 6.1 Static strength.8 6.2 Resistance to torsion.8 6.3 Dynamic strength.8 6.4 Fire performance.8 7 Testing.8 7.1 Static strength test (see Figure 4).8 7.1.1 Number of samples.8 7.1.2 Test of steps and rungs.8 7.1.3 Stile test.9 7.1.4 Test of the support and fastening system.9 7.2 Torsion test of steps and rungs.9 7.3 Dynamic strength test.9 8 Evaluation of conformity.10 8.1 General.10 8.2 Type testing.11 8.2.1 Initial type testing.11 8.2.2 Further type testing.11 8.3 Factory production control (FPC).11 8.3.1 General.11 8.3.2 Equipment.12 8.3.3 Raw materials and components.12 8.3.4 Non-conforming products.12 8.3.5 Design process.12 8.3.6 Product testing and evaluation.12 9 Instructions for installation and maintenance.12 10 Designation.12 11 Marking.13 12 Figures.13 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.18 ZA.1 Scope and relevant characteristics.18 ZA.2 Procedure for attestation of conformity of permanently fixed roof ladders.19 ZA.2.1 System of attestation of conformity.19



EN 12951:2004 (E) 3 ZA.2.2 EC Declaration of conformity.19 ZA.3 CE Marking and labelling.20 Bibliography.22



EN 12951:2004 (E) 4 Foreword This document (EN 12951:2004) has been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous laying and products for wall cladding”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.  Annex ZA (informative): Clauses of this European Standard addressing the provisions of the EU Construction products directive. This European Standard does not take into account the EC Directive "Personal Protective Equipment" (89/686/EC, 93/95/EC and 96/58/EC). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 12951:2004 (E) 5
1 Scope
This document applies to permanently fixed ladders made of metal which are permanently installed on the load-bearing construction of pitched roofs and which may be stepped or walked on for purposes of inspection, maintenance and repair of equipment installed above the roof surface.
This document specifies essential dimensions, materials to be used, requirements with respect to the load-bearing capacity, and the extent of testing. This document does not cover walkways, single treads, single steps or roof ladders that are not permanently fixed nor does it cover fire escape ladders. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 364, Personal protective equipment against falls from a height — Test methods. ISO 1140:1990, Ropes-Polyamide-Specification. 3 Terms, definitions, symbols and abbreviations
For the purposes of this document, the following terms and definitions apply. 3.1 permanently fixed roof ladders
construction with steps or rungs which is permanently installed on a pitched roof 3.2 fastening system combination of elements which fastens the roof ladder to the load-bearing roof construction 3.3 load-bearing roof construction that part of the roof construction which is able to carry potential loads and to transmit them into the building structure 3.4 surface of roof covering highest elevation of roofing materials between the stiles of the roof ladder, smaller elevations (for example, standing seams of sheet metal covered roofs see Figure 1b), being ignored NOTE If the roof covering has wide profiles and the design of the ladder makes it possible to walk with the feet in the profiles, the profiles' bottom may be considered as the surface. 3.5 symbols and abbreviations
a Height of upstands or battens in order to protect people from slipping from ladders d Depth of steps or rungs



EN 12951:2004 (E) 6 D Diameter of rungs F1 (Test) load H Distance between highest elevation of roof covering and the upper edge of the step or rung between cross beams of the roof ladder, measured perpendicular to the roof surface L Length of steps or rungs x Horizontal distance between two steps or rungs
y Vertical distance between two steps or rungs (rise of the steps or rungs) PCS Gross calorific potential 4 Materials Permanently fixed roof ladders and their fastening systems shall be made of metal and resistant to corrosion as well as to atmospheric and climatic influences. The materials shall be free from faults and inclusions which may impair their performance abilities. The corrosion resistance shall be at least equivalent to that of hot-dip galvanised steel with a protective layer of 50 µm. Parts of the fastening systems beneath the roof covering may be from timber and shall then be protected against atmospheric and climatic influences. Parts of the fastening system may consist of products for roof coverage. 5 Dimensions and design requirements 5.1 General In the working position all ladders shall be designed for a maximum static load of 150 kg (mass of one person with equipment). Roof ladders shall be categorised as follows: C1: Roof ladders that shall not be used as anchor points for personal protective equipment against falls from a height nor be used for attaching collective protection devices. C2: Roof ladders that may be used as anchor points for personal protective equipment against falls from a height There are two different types of roof ladders: TA: Roof ladders with steps. NOTE 1 Roof ladders with steps should primarily be used on roof surfaces with an inclination of ≥ 10° and < 45°. TB: Roof ladders with rungs. NOTE 2 Roof ladders with rungs should primarily be used on roof surfaces with an inclination of ≥45°



EN 12951:2004 (E) 7 5.2 Dimensions Steps shall have a minimum depth (d) of 80 mm (see Figure 3: Roof ladder dimensions). Rungs shall have a depth (d) of ≥ 20 mm and ≤ 80 mm (see Figure 2a). If rungs consist of a round tube the diameter (D) shall be ≥ 25 mm and ≤ 40 mm (see Figure 2b: Roof ladder type B). The length (L) of steps or rungs shall be at least 300 mm for category 1 and 350 mm for category 2 (see Figure 3). The roof ladder shall be designed in such a way that when the roof ladder has been fixed to the roof construction there is a minimum distance between the upper edge of the step or rung and the surface of the roof covering of H ≥ 100 mm measured rectangular to the roof pitch. The sum of (d) + 2 × (y) shall not exceed 690 mm (see Figure 3). 5.3 Design 5.3.1 General design requirements
Permanently fixed roof ladders shall have supports at least at the top and at the bottom fixing them to the load-bearing roof construction. The surface of steps and rungs shall be designed in such a manner that slipping of persons and collection of water and snow is prevented.
In order to protect people against slipping from ladders, steps and rungs shall be equipped with upstands or side battens along the side which, measured at the centre of the step’s surface (d/2), shall have a minimum height of 20 mm (a) (see figure 2a). Where steps or rungs are installed between stiles, the stiles shall perform this function. Roof ladders and fastening systems above roof coverings shall be free from sharp corners or edges. For category 2 ladders any anchor point shall be designed in such a way that a connected rope of the personal protective equipment against falls from a height cannot be damaged. Roof ladders and their fastening systems shall be designed in such a way that the roof covering, the membrane, and the load-bearing construction are not damaged during installation and normal use and are protected against atmospheric and climatic influences.
5.3.2 Additional design requirements for roof ladders type TA
The area of holes in the surface of steps shall be at least 50 % of the total area of a step. If the roof ladder is installed on roofs with more than one angle of inclination, the fixings between steps and stiles shall be adjustable. Fixings shall, however, be designed to prevent unintended disconnection and rotation after installation. The supports of roof ladders shall be designed in such a way that after mounting on the roof construction the inclination across 80 mm of depth (d) is not greater than 3° from the horizontal.



EN 12951:2004 (E) 8 6 Performance requirements 6.1 Static strength Roof ladders of categories 1 and 2 including their fastening systems shall be designed for a characteristic load of F1 ≥ 1,5 kN both in the direction of the roof inclination and in the vertical direction. NOTE For further calculations see ENV 1993 and ENV 1999 (steel and aluminium) Under a load of F1 = 1,5 kN the elastic deflection of stiles shall be not more than 1/100 of the support span and not more than 10 mm. The deflection of steps and rungs shall not be more than 5 mm. Compliance with these requirements should be proven by static calculation. Otherwise, the product shall be tested in accordance with 7.1.
The specimen shall not break under a test load of 2,6 kN. 6.2 Resistance to torsion Roof ladders shall provide sufficient resistance to torque. To comply with this document, roof ladders shall pass the torsion test as described in 7.2. 6.3 Dynamic strength Roof ladders of category 2, including their fastening systems, shall have sufficient dynamic strength at any point to which personal protective equipment against falls from a height may be attached. To comply with this document, roof ladders shall pass the dynamic strength test as described in 7.3.
6.4 Fire performance Roof ladders covered by this document are reaction to fire Class A1 without the need for testing1), provided that any organic coating does not exceed 1% by mass or volume, whichever is the more onerous, and deemed to satisfy external fire performance requirements2), provided that any external coating is inorganic or has a PCS ≤ 4,0 MJ/m² or a mass ≤ 200 g/m². 7 Testing 7.1 Static strength test (see Figure 4) 7.1.1 Number of samples Each test shall be conducted three times with different test specimen. Each specimen shall pass the test. 7.1.2 Test of steps and rungs The test load shall be applied by means of a load-distributing rigid steel plate of 100 mm × 100 mm. An initial load of 200 N shall be applied for 1 minute. The position of the step/rung after removal of the initial load shall define the initial point.
1) See Commission Decision 96/603/EC as amended by Commission Decision 2000/605/EC 2) See Commission
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