1、 GUIDE FOR THE CLASS NOTATION MOVABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) APRIL 2007 Guide to Color Coding Used in Online Version of the Guide The following summarizes the colors corresponding to Rule Changes, Corrigenda items and editorial changes in the Guide files which are available fo
2、r download. Rule Changes: NOTICE NO. 1 November 2010 (effective 1 January 2011) Corrigenda: CORRIGENDA/EDITORIALS 28 October 2008 CORRIGENDA/EDITORIALS 1 February 2014 Editorials: Editorial Changes Guide for the Class Notation Moveable Platforms (Decks) for Vehicle Loading (MOVDK) GUIDE FOR THE CLAS
3、S NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) APRIL 2007 (Updated February 2014 see next page) American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 Copyright 2007 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 7706
4、0 USA Updates February 2014 consolidation includes: November 2010 version plus Corrigenda/Editorials November 2010 consolidation includes: October 2008 version plus Notice No. 1 October 2008 consolidation includes: April 2007 version plus Corrigenda/Editorials ABSGUIDE FOR THE CLASS NOTATION MOVEABL
5、E PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 iii Foreword Foreword There is a desire in the industry for an optional class notation for moveable/retractable decks. ABS currently has requirements for design of retractable decks in the Rules for Building and Classing Steel Vessels (Section 3-
6、2-3 for all vessels and Section 5C-10-2 for Vehicle Carriers) and in the Rules for Building and Classing Steel Barges (Section 3-2-3). The Rules for Building and Classing High-Speed Craft (Section 3-2-3) and the Rules for Building and Classing High Speed Naval Craft (Section 3-2-3) also contain requ
7、irements for decks intended for vehicle loading. In addition, the Guide for Certification of Lifting Appliances (Chapter 6) contains requirements for lifting appliances of moveable platforms (decks). This Guide consolidates the above requirements for easy application of the Rule requirements for the
8、 optional notation MOVDK. For convenience, an easy-to-follow road map for classification of moveable platforms (decks) is also provided. iv ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 Table of Contents GUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (
9、DECKS) FOR VEHICLE LOADING (MOVDK) CONTENTS SECTION 1 Introduction 1 1 Scope . 1 3 Application 1 5 Definitions . 1 7 Submission of Design Plans and Data . 1 SECTION 2 Design Criteria 3 1 General . 3 3 Plating . 3 3.1 General 3 3.3 Uniform Loading 3 3.5 Loading of Vehicles with Rubber Tires 3 3.7 Hig
10、her-strength Steels . 6 3.9 Fiber Reinforced Plastic 6 5 Local and Primary Support Members . 7 5.1 General 7 5.3 Steel Vessels and Steel Barges 7 5.5 High Speed Naval Craft . 7 5.7 Higher-strength Steels . 7 7 Loading of Vehicles with Rubber Tires . 8 7.1 General 8 7.3 Loads and Fixities 8 7.5 Allow
11、able Stresses 9 9 Lashing Points 9 FIGURE 1 Wheel Loading Curves of “K” . 4 FIGURE 2 Values for . 6 SECTION 3 Lifting Appliances for Moveable Platforms (Decks) 10 APPENDIX 1 Summary of ABS Requirements . 11 ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007
12、1 Section 1: Introduction SECTION 1 Introduction 1 Scope This Guide covers design criteria for moveable platforms (decks) on vessels classed with ABS. The Guide consolidates the requirements for moveable platforms (decks) currently found in the following Rules and Guides: Rules for Building and Clas
13、sing Steel Vessels (Steel Vessel Rules) (3-2-3/5.15, 3-2-3/7.3, et al.) Rules for Building and Classing Steel Vessels Vehicle Carriers (5C-10-2/11.11, 5C-10-2/11.13) Rules for Building and Classing Steel Barges (Steel Barge Rules) (3-2-3/15, 3-2-3/19, et al.) Rules for Building and Classing High-Spe
14、ed Craft (High-Speed Craft Rules) (3-2-3/1.9, 3-2-3/5.7.6, 3-2-4/1.15, et al.) Rules for Building and Classing High-Speed Naval Craft (HSNC Rules) (3-2-3/1.9, 3-2-3/5.7.6, 3-2-4/1.15, et al.) Guide for Certification of Lifting Appliances (Lifting Appliances Guide) (Chapter 6) cross-reference for cer
15、tification of lifting appliances See also the flowcharts in Appendix 1 for a detailed map of the above requirements. 3 Application This Guide is applicable to moveable platforms (decks) on steel vessels of all lengths, vehicle carriers, steel barges, high speed craft and high speed naval craft. Vess
16、els in compliance with this Guide will be assigned the notation MOVDK. 5 Definitions Moveable Platform (Deck) a deck intended for the stowage of vehicles that can be either a retractable tween deck or a hatch cover. Retractable Tween Deck a deck that allows an extra level of vehicle stowage within a
17、 hold and can be raised or lowered to stow out of the way when not in use. Hatch Cover a deck that allows an extra level of vehicle stowage within a hold and can be removed and stowed when not in use. These decks are often of pontoon-type construction. 7 Submission of Design Plans and Data (2011) Pl
18、ans should generally be submitted electronically to ABS. However, hard copies will also be accepted. Detailed structural drawings. Specification of vehicles to be loaded on moveable platform (deck) (i.e., total weight, axle width/loads, wheelbase, wheel imprint sizes). Stowage arrangement of vehicle
19、s. Details of moveable platform (deck) loading conditions, including moveable platforms (decks) self weight and center of gravity. Section 1 Introduction 2 ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 Arrangements and details of supporting/securing mea
20、ns. Calculations. Moveable platform (deck) general arrangement. Operations and Maintenance manual. If moveable platforms (decks) are arranged in ro-ro spaces, similar drawings of ramps for vehicle loading are to be submitted. ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOA
21、DING (MOVDK) .2007 3 Section 2: Design Criteria SECTION 2 Design Criteria 1 General The scantlings of moveable platforms (decks) are to comply with the requirements in this Section. 3 Plating 3.1 General The edges of the deck panels are to be stiffened to provide the necessary rigidity. 3.3 Uniform
22、Loading 3.3.1 Steel Vessels and Steel Barges The thickness of the moveable platform (deck) plating is to be not less than required by the following equation for platform decks in enclosed cargo spaces. t = 0.00395sbh + 1.5 mm but not less than 5.0 mm t = 0.00218sbh + 0.06 in. but not less than 0.20
23、in. where h = tween deck height, in meters (feet). When a design load is specified, h is to be taken as p/7.07 m (p/720 m, p/45 ft) p = uniformly distributed deck loading, in kN/m2(kgf/m2, lbf/ft2) sb= spacing of deck beams, in mm (in.) 3.5 Loading of Vehicles with Rubber Tires 3.5.1 Steel Vessels a
24、nd Steel Barges When moveable platforms (decks) are intended for the operation or stowage of vehicles having rubber tires, the thickness of the deck plating is to be not less than obtained from the following equation, except that for hatch covers, the thickness of plate panels adjacent to the edges
25、of the moveable platforms (decks) is to be at least 15% greater. The moveable platforms (decks) are to be secured against movement and effectively supported by the hull structure. t = 0.9kKn CW mm (in.) where k = 8.05 (25.2, 1.0) K = as obtained from Section 2, Figure 1 Section 2 Design Criteria 4 A
26、BSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 n = 1.0 where /s 2.0 and 0.85 where /s = 1.0, for intermediate values of /s, n is to be obtained by interpolation C = 1.5 for wheel loads of vehicles stowed at sea and 1.1 for vehicles operating in port W = s
27、tatic wheel load, in kN (tf, Ltf) a = the wheel imprint dimension, in mm (in.), parallel to the longer edge, , of the plate panel b = the wheel imprint dimension, in mm (in.), perpendicular to the longer edge, , of the plate panel s = the spacing of deck beams or deck longitudinals, in mm (in.) = th
28、e length of the plate panel, in mm (in.) Where the wheels are close together, special consideration will be given to the use of a combined imprint and load. Where the intended operation is such that only the larger dimension of the wheel imprint is perpendicular to the longer edge of the plate panel
29、, then b above may be taken as the larger wheel imprint dimension, in which case a is to be the lesser dimension. FIGURE 1 Wheel Loading Curves of “K” 3.5.2 High Speed Craft Where provision is to be made for the operation or stowage of vehicles having rubber tires, and after all other requirements a
30、re met, the thickness of steel moveable platform (deck) plating is to be not less than obtained from the following equation. Required deck thickness for aluminum moveable platforms (decks) will be subject to special consideration. t = 0.9kKn +21.1xxnW mm (in.) where k = 8.05 (25.2, 1) K = as given i
31、n Section 2, Figure 1 Section 2 Design Criteria ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 5 n = 1.0 where /s 2.0 and 0.85 where /s = 1.0. For intermediate values of /s, n is to be obtained by interpolation. W = static wheel load, in kN (tf, Ltf) nxx
32、= average vertical acceleration at the location under consideration as defined in 3-2-2/1.1 of the ABS High-Speed Craft Rules a = wheel imprint dimension, in mm (in.), parallel to the longer edge, , of the plate panel b = wheel imprint dimension, in mm (in.), perpendicular to the longer edge, , of t
33、he plate panel s = spacing of deck beams or deck longitudinals, in mm (in.) = length of the plate panel, in mm (in.) Where the wheels are close together, special consideration will be given to the use of the combined imprint and load. Where the intended operation is such that only the larger dimensi
34、on of the wheel imprint is perpendicular to the longer edge of the plate panel, b above may be taken as the larger wheel imprint dimension, in which case a is to be the lesser one. 3.5.3 High Speed Naval Craft Where provision is to be made for the operation or stowage of vehicles having rubber tires
35、, and after all other requirements are met, the thickness of steel or aluminum moveable platform (deck) plating is to be not less than obtained from the following equation: t = axxnW )5.01(9.0mm (in.) where W = static wheel load, in N (lbf) nxx= average vertical acceleration at the location under co
36、nsideration as defined in 3-2-2/1.1 of the ABS HSNC Rules = as given in Section 2, Figure 2 a= design stress for decks, in N/mm2(kgf/mm2, psi) = 0.60yy= yield strength of steel or of welded aluminum in N/mm2(kgf/mm2, psi), but not to be taken greater than 70% of the ultimate strength of steel or wel
37、ded aluminum Where the wheels are close together, special consideration will be given to the use of combined imprint and load. Where the intended operation is such that only the larger dimension of the wheel imprint is perpendicular to the longer edge of the plate panel, then b below may be taken as
38、 the smaller wheel imprint dimension, in which case, a is to be the greater one. The use of aluminum sandwich panels for wheel loading will be specially considered. Section 2 Design Criteria 6 ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 FIGURE 2 Value
39、s for basb/s /s = 1 /s = 1.4 /s 2 a/s 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.8 1.2 1.4 0 0.4 0.8 1.2 1.6 2 0 1.82 1.38 1.12 0.93 0.76 2.00 1.55 1.12 0.84 0.75 1.64 1.20 0.97 0.78 0.64 0.2 1.82 1.28 1.08 0.90 0.76 0.63 1.78 1.43 1.23 0.95 0.74 0.64 1.73 1.31 1.03 0.84 0.68 0.57 0.4 1.39 1.07 0.84 0.72 0.62
40、0.52 1.39 1.13 1.00 0.80 0.62 0.55 1.32 1.08 0.88 0.74 0.60 0.50 0.6 1.12 0.90 0.74 0.60 0.52 0.43 1.10 0.91 0.82 0.68 0.53 0.47 1.04 0.90 0.76 0.64 0.54 0.44 0.8 0.92 0.76 0.62 0.51 0.42 0.36 0.90 0.76 0.68 0.57 0.45 0.40 0.87 0.76 0.63 0.54 0.44 0.38 1 0.76 0.63 0.52 0.42 0.35 0.30 0.75 0.62 0.57
41、0.47 0.38 0.33 0.71 0.61 0.53 0.45 0.38 0.30 Notes: s = spacing of deck beams or deck longitudinals, in mm (in.) = length of plate panel, in mm (in.) a = wheel imprint dimension, in mm (in.), parallel to the shorter edge, s, of the plate panel b = wheel imprint dimension, in mm (in.), parallel to th
42、e longer edge, , of the plate panel 3.7 Higher-strength Steels Where moveable platforms (decks) are constructed of higher-strength steel and provision is made for the operation or stowage of vehicles having rubber tires, the thickness of plating is to be not less than obtained from the following equ
43、ation: thts= tmsYM / mm (in.) where tms= thickness of ordinary-strength steel, as obtained from 2/3.3 or 2/3.5, as applicable Y = specified minimum yield point or yield strength, in N/mm2(kgf/mm2, psi), as defined in 2-1-1/13 of the ABS Rules for Materials and Welding (Part 2), for the higher-streng
44、th material or 72% of the specified minimum tensile strength, whichever is the lesser M = 235 (24, 34000) 3.9 Fiber Reinforced Plastic For moveable platforms (decks) constructed of fiber reinforced plastic, special consideration will be given to the required thickness where provision is made for the
45、 operation or stowage of vehicles having rubber tires after all other requirements are met. Section 2 Design Criteria ABSGUIDE FOR THE CLASS NOTATION MOVEABLE PLATFORMS (DECKS) FOR VEHICLE LOADING (MOVDK) .2007 7 5 Local and Primary Support Members 5.1 General Local and primary support members are t
46、o be efficiently arranged to support the loads on moveable platforms (decks). These supporting members are to have adequate structural stability. On moveable platforms (decks), both the web and flange are to be welded to the supporting member. At beam knees or at other bracketed end connections, con
47、tinuity of strength of the beam or longitudinal is to be maintained at the connection to the bracket and at the connection of the bracket to the supporting member. Welding is to be in accordance with 3-2-19/Table 1 of the ABS Steel Vessel Rules. Girders and transverses of the sizes required by 3-2-8
48、/5.3 through 3-2-8/5.15 of the ABS Steel Vessel Rules are to be fitted, as required to support the beams. In way of deck girders or special deep beams, the deck plating is to be of sufficient thickness and suitably stiffened to provide an effective part of the girder. 5.3 Steel Vessels and Steel Bar
49、ges The local or primary support members, in association with the plating to which they are attached, are to have section modulus, SM, not less than obtained from the following equation. SM = kchs2cm3(in3) where k = 7.8 (0.0041) c = 0.81 for the section modulus to the flange or face bar = 1.00 for the section modulus to the deck plating h = p/7.07 m (p/720 m, p/45 ft) p = uniform loading, in kN/m2(kgf/m2, lbf/ft2) s = spacing of the local or primary support members, in m (ft) = unsuppo
