BS-MA-40-1-1975.pdf

BRITISH STANDARD MARINE SERIES CONFIRMED JULY 1999 BS MA 40-1:1975 Specification for Marine guardrails, stanchions, etc. Part 1: Guardrails for merchant ships (excluding passenger ships) UDC 629.12.011.79:629.123.4 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 This British Standard, having been approved by the Shipbuilding and Marine Industry Standards Committee, was published under the authority of the Executive Board on 30 April 1975 © BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference SME/2 Draft for comment 73/34145 ISBN 0 580 08542 2 Foreword This Part of this British Standard has been prepared under the authority of the Shipbuilding and Marine Industry Standards Committee and is based on a proposal of the British Ship Research Association. It forms Part 1 of BS MA 40 “Marine guardrails, stanchions etc.” and deals with guardrails and stanchions for merchant ships excluding passenger ships. Other Parts are as follows. Part 2: Gates and portable guardrail sections for merchant ships (excluding passenger ships); Part 3: Storm rails (exterior). Certification. Attention is drawn to the certification facilities described on the inside back cover of this standard. A British Standard does not purport to include all the necessary provisions of 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, pages 1 to 10, an inside back cover 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. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-2000i Contents Page ForewordInside front cover 1Scope1 2References1 3Definitions1 4Materials1 5Design, construction and installation1 6Quality of manufacture and finish2 7Inspection2 Figure 1 Typical stanchion arrangements for types A, B and C3 Figure 2 Typical stanchion arrangements for types D and E4 Figure 3 Details of stanchions5 Figure 4 Detail of wooden toprail6 Figure 5 Typical arrangements of guardrails7 Figure 6 Handrail for ladders8 Figure 7 Typical arrangements of guardrails at ladders9 Table 1 Components and materials of guardrails1 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-20001 NOTEUsers of this British Standard: Marine Series, should note that while observing the requirements of the standard, they should at the same time ensure compliance with such statutory requirements, rules and regulations as may be applicable to the individual ship concerned. 1 Scope This Part of BS MA 40 specifies dimensions, materials, quality of manufacture and finish for guardrails and stanchions which are fitted on exposed freeboard and superstructure decks of merchant ships to prevent personnel falling overboard or to lower decks and also for handrails at ladder positions. 2 References This standard makes reference to the following British Standards. BS 499, Welding terms and symbols Part 2: Symbols for welding. BS 729, Hot dip galvanized coatings on iron and steel articles. BS 1387, Steel tubes and tubulars suitable for screwing to BS 21 pipe threads. BS 4190, ISO metric black hexagon bolts, screws and nuts. BS 4320, Metal washers for general engineering purposes. BS 4360, Weldable structural steels. 3 Definitions For the purposes of this Part of BS MA 40, the following definitions apply. 3.1 guardrail a construction comprising stanchions, rails, toprails and stays (see Figure 3 and Figure 5) 3.2 stanchions the principal vertical structural members of a guardrail system 3.3 toprail the uppermost rail in a series of rails (may be of wood, steel or other suitable materials, e.g. PVC) 3.4 stay a secondary structural support attached to stanchions and deck 4 Materials The materials for the manufacture of individual components shall be as shown in Table 1. 5 Design, construction and installation 5.1 Principal dimensions 5.1.1 The height of the toprails shall be a minimum of 1 000 mm. This dimension shall be measured from the top of the toprail to the deck at a point vertically below the inner edge of the toprail, or, if the deck has a waterway, to the top of the deck plank or covering next to the waterway. 5.1.2 The opening below the lowest course of rails shall be a maximum of 230 mm, measured from the underside of the rail to the deck or waterway bar, where fitted (see Figure 1 and Figure 2). 5.1.3 The opening between the upper courses shall be a maximum of 380 mm (see Figure 1 and Figure 2). 5.1.4 The maximum distance between stanchions shall be 1 500 mm. 5.1.5 The dimensions of guardrails, stanchions etc., constructed in accordance with this British Standard shall be as set out in Figure 1 to Figure 7. Table 1 Components and materials of guardrails Ref. No.ItemMaterialBS No.Remarks 1StanchionsSteelBS 4360 Grade 43A. See 5.2 2StaysSteelBS 4360 Grade 43A. See 5.4 3aToprail, tubeSteelBS 1387 Medium quality. See 5.3.1 Toprail, woodTeak or other suitable hardwoodSee 5.3.2 4RailsSteelBS 4360 Grade 43A. See 5.3.3 5WashersBrassBS 4320 Form E, M12 6NutsBrassM12 7BoltsSteelBS 4190 M12 8Screws, coachBrass NOTEShip quality steel may be used in place of BS 4360, grade 43A. a See 5.3.3 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 2 © BSI 02-2000 5.2 Stanchions 5.2.1 Stanchions for guardrails shall be cut from 65 mm × 15 mm steel flat bar and shall be welded to the deck and side plate as shown in Figure 1, Figure 2 and Figure 3. 5.2.2 Stanchions shall be erected vertically. 5.2.3 Stanchions shall not be welded to the top edge of the shear strake within 0.5L amidships, but shall be welded to the deck clear of the sheer strake (see Figure 1, type A). 5.2.4 On decks with rounded gunwales, stanchions shall be welded to the flat portion of the deck clear of welded plate seams (see Figure 1, type B). 5.2.5 Stanchions on fore and aft gangways of tankers shall be fabricated to suit the gangway structure and should be in general accordance with Figure 2, type E. 5.2.6 Stanchions forming walkways on freeboard decks should be similar to those shown in Figure 1, type A. 5.3 Rails 5.3.1 Top rails shall be cut from nominal size 32 steel tube (42.4 mm outsize diameter) medium quality as specified in BS 1387 and welded to stanchions as shown in Figure 3. 5.3.2 Where wooden top rails are required, they shall be made from first quality teak, free from defects such as wane splits and checks. Other hardwoods may be used provided that they are at least as suitable in all respects and are equally acceptable to the purchaser (see Figure 4). 5.3.3 Toprails may also be manufactured from PVC and/or other suitable materials, provided that they meet the dimensional requirements of this standard and are equally acceptable to the purchaser. 5.3.4 Lower rails shall be cut from 20 mm diameter solid round steel bar. The rails shall be passed through holes drilled in the stanchions and welded into position. Rails shall not penetrate end stanchions. 5.3.5 Lengths of rail shall be continuous and shall be welded or joined only in way of stanchions. At stanchions, rail butts shall be welded all round. 5.4 Stays. Stays shall be cut from 65 mm × 15 mm flat bar and welded to every third stanchion or end stanchion where required (see Figure 3). 5.5 Fairlead positions. Typical arrangements of guardrails at fairlead positions are shown in Figure 5. 5.6 Ladder handrails 5.6.1 Ladder handrails shall be fabricated from nominal size 32 steel tube (42.4 mm outside diameter) medium quality and welded or bolted to ladder stringer (see Figure 6). 5.6.2 The minimum bending radius shall be 100 mm to the inside surface of the tube (see Figure 6). 5.6.3 The position of guardrail end stanchions at ladder positions shall be as shown in Figure 7. 6 Quality of manufacture and finish 6.1 Guardrails and stanchions shall be manufactured with a minimum of distortion. 6.2 Guardrails and stanchions shall be free from defects and imperfections liable to cause injury to persons using them. 6.3 The rails, stanchions and stays shall be given protective finishes appropriate to their shipboard location. Galvanizing shall be carried out, where specified, in accordance with BS 729. 6.4 The welding symbols used in the figures are in accordance with BS 499-2: the associated dimensions are expressed in terms of the weld throat thickness and not leg length. 7 Inspection The rails shall be subjected to visual inspection for freedom from defects and imperfections (see 6.1 and 6.2). Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-20003 Figure 1 Typical stanchion arrangements for types A, B and C Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 4 © BSI 02-2000 Figure 2 Typical stanchion arrangements for types D and E Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-20005 Figure 3 Details of stanchions Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 6 © BSI 02-2000 NOTEToprail secured to pad by coach screws or M12 bolts, with nuts and washers recessed into counterbore, then dowelled. All dimensions in millimetres Figure 4 Detail of wooden toprail Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-20007 Figure 5 Typical arrangements of guardrails Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 8 © BSI 02-2000 Figure 6 Handrail for ladders Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-20009 Figure 7 Typical arrangements of guardrails at ladders Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 10 blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 40-1:1975 © BSI 02-2000 BSI Certification Trade Mark The Kitemark The Kitemark is the registered certification trade mark of the British Standards Institution. 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