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1、BRITISH STANDARD BS EN 790:1995 Inland navigation vessels Stairs with inclination angles of 45 to 60 Requirements, types The European Standard EN 790:1994 has the status of a British Standard UDC 629.122.011.57:531.747:614.8 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2
2、006, Uncontrolled Copy, (c) BSI BS EN 790:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 July 1995 BSI 12-1999 The following BSI references relate to the work o
3、n this standard: Committee reference GME/32 Draft for comment 92/80641 DC ISBN 0 580 24501 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GME/32, Steering committee for shipbuilding and marine standards, upon which the
4、 following bodies were represented: British Marine Equipment Council British Maritime Technology British Motor Ship Owners Association British Waterways Board Chamber of Shipping Lloyds Register of Shipping Marine Safety Agency Ministry of Defence Shipbuilders and Shiprepairers Association Amendment
5、s issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 790:1995 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 7903 Licensed Copy: s
6、heffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 790:1995 ii BSI 12-1999 National foreword This British Standard has been prepared by Technical Committee GME/32 and is the English language version of EN 790:1994 Inland navigation vessels Stairs with in
7、clination angles of 45 to 60 Requirements, types, published by the European Committee for Standardization (CEN). EN 790 was produced as a result of international discussion in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of
8、 a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages
9、 2 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
10、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 790 August 1994 UDC 629.122.011.57:531.747:614.8 Descriptors: Inland navigation, ships, stairs, slope, definitions, specifications, safety, parapets, handrails, dimensions, mechanical strength, tests, designation English version Inland navigation
11、vessels Stairs with inclination angles of 45 to 60 Requirements, types Bateaux de navigation intrieure Escaliers angles dinclinaison entre 45 et 60 Exigences, types Fahrzeuge der Binnenschiffahrt Treppen mit Steigungswinkeln von 45 bis 60 Anforderungen, Bauarten This European Standard was approved b
12、y CEN on 1994-08-09. 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
13、 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 translation under the responsibility of a CEN member into its own language and notified to the
14、Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN Europ
15、ean Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 790:1994 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncon
16、trolled Copy, (c) BSI EN 790:1994 BSI 12-1999 2 Foreword This European Standard was prepared by Technical Committee CEN/TC 15, Inland navigation vessels, of which the secretariat is held by DIN. CEN/TC decided to submit the final draft for formal vote by its resolution. The result was positive. This
17、 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 February 1995, and conflicting national standards shall be withdrawn at the latest by February 1995. According to the CEN/CENELEC Internal Regulations,
18、the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 1Scope3 2Normative references
19、3 3Definitions3 4Safety requirements4 4.1Design4 4.2Safety dimensions4 4.3Safety specifications4 5Testing7 6Designation7 Figure 1 Coordination of dimensions for stairs and railings5 Table 1 Explanation and dimensions6 Table 2 Dimensions !, a, b6 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07
20、 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 790:1994 BSI 12-19993 1 Scope This standard applies to stairs with inclination angles of 45 to 60 used in working areas of inland navigation vessels. It does not apply to stairs accessible to passengers. For stairs in the outside area inclinati
21、on angles up to 55, and for stairs in engine rooms and boiler rooms inclination angles up to 60 are admissible. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate place
22、s 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 references the latest edition of the publication referr
23、ed to applies. prEN 711, Inland navigation vessels Railings for decks Requirements, types. ISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications. ISO 5485, Shipbuilding Inland vessels Fixed steel deck stairs. 3 Definitions For th
24、e purposes of this standard the following definitions apply. 3.1 stair walkway with steps solidly fixed between two planes 3.2 inclination angle angle between the pitch line connecting the front edges of the steps and the horizontal lower plane 3.3 stair breadth clear breadth of the stair measured b
25、etween the strings 3.4 headroom vertical distance between the pitch line connecting the front edges of the steps and the fixed components 3.5 step tread of the stair 3.6 space between steps vertical distance between the upper edges of successive steps 3.7 depth of steps distance between the front an
26、d rear edges of the steps measured on the tread 3.8 string lateral limitation of the stair supporting the steps 3.9 railing a construction of stanchions, handrail and, if necessary, intermediate rail Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (
27、c) BSI EN 790:1994 4 BSI 12-1999 3.10 height of railing vertical distance between the pitch line connecting the front edges of the steps and the upper edge of the hand rail 3.11 hand rail 3.11.1 upper continuous part of a railing running in parallel to the string and serving as a handhold to persons
28、 using the stair and protecting them from falling outboard of the railing 3.11.2 round section which is fixed at a bulkhead adjacent to the stair, running in parallel to the stairway and serving as handhold 3.12 stanchion part of the railing connecting hand rail and intermediate rail, if any, to the
29、 string 3.13 intermediate rail continuous part fixed between hand rail and string and protecting persons from falling outboard of the railing 4 Safety requirements Safety requirements refer to design, dimensions, strength and manufacture. 4.1 Design The stairs are not expected to conform to Figure 1
30、; compliance is only required in the case of the dimensions specified in clauses 4 to 6. 4.2 Safety dimensions Dimensions in millimetres. General tolerances: ISO 2768-c Details not specified shall be suitably selected. Stairs, railings, platforms as well as free spaces in front of and above the stai
31、rs have to conform to the specifications as given in Table 1 and Table 2 and Figure 1. 4.3 Safety specifications 4.3.1 Space between steps The space between steps is to be the same for all steps of a stair. The uppermost step of a stair shall be at the same horizontal level as the adjacent landing o
32、r shall end one normal step underneath. The distance between the lowest step and the floor may differ from the selected space between steps a by + 20 mm to 50 mm. 4.3.2 Landings/platforms adjacent to stairs In front of stairs there shall be a tread of at least 0,80 m depth and of at least the breadt
33、h of the stair. Platforms adjacent to stairs shall be provided with railings in accordance with prEN 711 at both sides of the walkway. If possible, coamings at platforms or the adjacent landing shall be scalloped in the walkway up to the height of the proximate step. 4.3.3 Safety of treads Steps and
34、 platforms shall have a non-slip surface. Steps shall be designed in such a way that they can be easily cleaned and that water cannot accumulate. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 790:1994 BSI 12-19995 Figure 1 Coordination
35、of dimensions for stairs and railings Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 790:1994 6 BSI 12-1999 Table 1 Explanation and dimensions Table 2 Dimensions !, a, b 4.3.4 Hand rails/railings Stairs with up to three steps shall have
36、a handhold at one side. Stairs with more than three steps shall be provided with railings or hand rails at both sides. Railings of stairs with an inclination angle not exceeding 55 shall have an intermediate rail in the middle of the railing height. Hand rails or railings shall be continuous for the
37、 full length of the stairway. At their upper ends they shall be suitably connected to structures or other continuous railings. At their lower ends hand rails and railings shall extend to the vertical line above the outermost point of the string. Hand rails shall be designed in such a way that their
38、connectors do not hinder the continuous movement of the hands. Their distance from adjacent structure shall be at least 60 mm. Their ends shall be arranged in such a way that injuries are prevented and damage to clothes is avoided. Dimensions in millimetres SymbolExplanationDimensions !Inclination a
39、ngle of the stairSee Table 2 Deviation of step inclination from the horizontal line aSpace between steps See Table 2 bDepth of steps cVertical distance between the front edge of the lowest step and the lower plane dHorizontal distance between the intersection of the pitch line connecting the front e
40、dges of the steps and the upper plane and the front edge of the upper landing 30 max. eHorizontal distance between the upper after edge of the upmost step and the front edge of the upper landing 30 max. f1Stair breadth between the strings600 min. f2Clear width between the hand rails600 min. gDistanc
41、e between hand rail and fixed components60 min. hHeight of railing iVertical distance between the middle of hand rail and the middle of intermediate rail . h/2 jDistance between stanchions measured at hand rail1 500 max. kHeadroom2 000 min. Dimensions in millimetres DimensionsStairs in the outside a
42、rea and for general use Stairs for engine rooms and boiler rooms !a45505560 ab bU 230U 200U 175U 150 a Intermediate values of ! are admissible, the values for a and b shall be interpolated. b Dimensional deviation for two consecutive steps shall not be more than 2 mm. 0 0 1 a + 20 60 900 + 50 0 200
43、+ 30 0 210 + 20 10 200 + 10 20 230 0 30 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 790:1994 BSI 12-19997 4.3.5 Headroom The clear height above stairs, treads and platforms shall be at least 2,0 m vertically. 4.3.6 Deviation for stair
44、s designed for a height difference of less than 1 m In contrast to the information given in Table 1, for stairs which are designed for a height difference of less than 1 m the difference between steps may be a = 230mm 4.3.7 Strength Stairs shall be solidly mounted. Steps shall be designed for a sing
45、le load of 1,5 kN. If the expected load of 5 kN/m2 leads to greater values, these are to be considered for calculation. The fixed stair shall withstand a load which corresponds to 50 % of the total of the step loads without producing permanent deformations. For treads and platforms adjacent to stair
46、s, a load (vertical traffic load) of 5 kN/m2 shall be taken into account. Hand rails and intermediate rails shall have to withstand a force of 500 N acting at any place without producing permanent deformation and being deflected by more than 20 mm. 5 Testing Testing of the safety requirements for st
47、airs with inclination angles of 45 to 60 is effected in accordance with the specifications of this standard by verification of strength, visual inspection and measuring carried out by accredited institutions. 6 Designation + 40 30 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:50:37 GMT+0
48、0:00 2006, Uncontrolled Copy, (c) BSI BS EN 790:1995 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incor
49、porated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on