SIST EN 14975:2007
(Main)Loft ladders - Requirements, marking and testing
Loft ladders - Requirements, marking and testing
This European Standard specifies terms and definitions, product requirements and test methods for the construction and performance of loft ladders.
Bodentreppen - Anforderungen, Kennzeichnung und Prüfung
Diese Europäische Norm legt die Begriffe, Produktanforderungen und Prüfverfahren für die Konstruktion und Funktionsfähigkeit von Bodentreppen fest.
Ecscaliers du grenier - Exigences, marquage et essais
La présente Norme européenne spécifie les termes et les définitions applicables aux échelles de grenier et indique les exigences et méthodes d’essai relatives a la construction et aux performances de ces produits.
Lestve – Zahteve, označevanje in preskušanje
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Loft ladders - Requirements, marking and testingEcscaliers du grenier - Exigences, marquage et essaisBodentreppen - Anforderungen, Kennzeichnung und PrüfungTa slovenski standard je istoveten z:EN 14975:2006SIST EN 14975:2007en;fr;de97.145LestveLaddersICS:SLOVENSKI
STANDARDSIST EN 14975:200701-maj-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14975December 2006ICS 97.145 English VersionLoft ladders - Requirements, marking and testingEscaliers du grenier - Exigences, marquage et essaisBodentreppen - Anforderungen, Kennzeichnung undPrüfungThis European Standard was approved by CEN on 25 November 2006.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, Romania,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© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14975:2006: E
EN 14975:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Maximum load.8 5 Test methods.8 6 Ladder construction and design.13 7 Marking.18 8 User instructions.18
EN 14975:2006 (E) 3 Foreword This document (EN 14975:2006) has been prepared by Technical Committee CEN/TC 93 “Ladders”, the secretariat of which is held by DIN. 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 June 2007, and conflicting national standards shall be withdrawn at the latest by June 2007. 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 14975:2006 (E) 4 1 Scope This European Standard specifies terms and definitions, product requirements and test methods for the construction and performance of loft ladders. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 loft ladder ladder designed to be permanently fixed at its top end with sliding or hinged sections permitting it to be lowered to and raised from a lower level to provide access to a loft or similar point at a higher level 3.2 types of loft ladder
3.2.1 concertina loft ladder loft ladder with extendable climbing support NOTE See Figure 1.
Figure 1 — Concertina loft ladder
EN 14975:2006 (E) 5 3.2.2 hinged/folding loft ladder loft ladder with hinged or folded climbing support NOTE See Figure 2.
Figure 2 — Hinged/folding loft ladder 3.2.3 sliding loft ladder loft ladder with sliding climbing support 3.2.3.1 push-out sliding loft ladder sliding loft ladder with climbing support to be pushed out NOTE See Figure 3.
EN 14975:2006 (E) 6
Figure 3 — Push-out sliding loft ladder 3.2.3.2 pull-out sliding loft ladder sliding loft ladder with climbing support to be pulled out NOTE See Figure 4.
EN 14975:2006 (E) 7
Figure 4 — Pull-out sliding loft ladder 3.3 parts of a loft ladder
3.3.1 handrail rail fitted to loft ladder to give user support when climbing or descending loft ladder 3.3.2 trapdoor door giving access to loft or similar point at a higher level NOTE The loft ladder may or may not be attached to the trapdoor. 3.3.3 hinge connecting element between loft ladder or trapdoor and loft or trapdoor casing similar point at a higher level
EN 14975:2006 (E) 8 3.3.4 rung climbing support with a standing surface from front to back of less than 80 mm and more than 20 mm 3.3.5 stile side members to which the rungs, treads or cross-members are fitted 3.3.6 stile hinge connecting element between folding ladder parts 3.3.7 locking device mechanism to prevent unintended sliding out, extending or unfolding of the loft ladder 3.3.8 tread climbing support with a standing surface from front to back equal to or greater than 80 mm 4 Maximum load The requirements are based upon a maximum total load of 150 kg. Loft ladders are designed to be used by one person at a time. 5 Test methods 5.1 General 5.1.1 Tolerances For all tests, unless otherwise stated in the particular test, the following tolerances are permitted as uncer-tainty of measurement: ± 1 mm for linear measurements; ± 1° for the measurement of angles; ± 1 % for static forces and torque; ± 3 % for dynamic forces. 5.1.2 Test sequence Tests shall be performed in the order they are given in the standard. 5.1.3 Test temperature All tests shall be performed at room temperature (15 °C to 25 °C).
EN 14975:2006 (E) 9 5.2 Static load test Set up the ladder at its maximum length (fully extended) and adjust it in accordance with the manufacturer’s instructions, perpendicular to the pivot line of the top hinge. Position the feet on a platform provided with rollers so that the ladder is at the particular ladder’s median operating angle ± 3°. If a catch is fitted to one side only, carry out the test on the side opposite to the catch. Apply a pre-load of 1 000 N over 100 mm × 100 mm in the centre of: a) the central tread or rung F2; b) the top tread or rung F1; c) the tread or rung nearest to the joint(s), hinges(s) or overlap(s) of the stiles. Maintain the force on points F1 and F2 in turn for 60 s. Measure the deformation of the stile after the pre-load. This now represents the reference point from which subsequent deformation will be recorded. Apply the total test force of 2 600 N on each point in turn over 100 mm × 100 mm and maintain for 60 s. Remove the load and examine the stiles and record any permanent deformation. Also check that the ladder is capable of being stowed and un-stowed. After removal of the test loads no visible permanent deformation shall occur on the hinge-joints, opening restraint devices and their attachments. The ladder shall not show any visible damage such as cracks, indentations etc. For sliding and folding/hinged loft ladders the maximum permissible permanent deformation f is less than or equal to (0,005 × maximum extended length of stiles) mm. For all types of loft ladder any permanent deformation shall not impair the fitness for use of the ladder and the ladder shall still be capable of being stowed and un-stowed.
EN 14975:2006 (E) 10
Key 1 roller Figure 5 — Static load test 5.3 Fatigue test Set up the ladder at its maximum length (fully extended) and adjust it in accordance with the manufacturer’s instructions, perpendicular to the pivot line of the top hinge. If a catch is fitted to one side only, carry out the test on the side to which the catch is fitted. Apply cyclic
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