Requirements for the Application of Standard Vehicle Gauges

Requirements for the Application of Standard Vehicle Gauges Synopsis This Railway Group Standard defines standard vehicle gauges and the associated application rules for rolling stock and for infrastructure. Copyright in the Railway Group Standards is owned by Rail Safety and Standards Board Limited. All rights are hereby reserved. No Railway Group Standard (in whole or in part) may be reproduced, stored in a retrieval system, or transmitted, in any form or means, without the prior written permission of Rail Safety and Standards Board Limited, or as expressly permitted by law. RSSB Members are granted copyright licence in accordance with the Constitution Agreement relating to Rail Safety and Standards Board Limited. Content approved by: Infrastructure Standards Committee on 09 January 2008 In circumstances where Rail Safety and Standards Board Limited has granted a particular person or organisation permission to copy extracts from Railway Group Standards, Rail Safety and Standards Board Limited accepts no responsibility for, and excludes all liability in connection with, the use of such extracts, or any claims arising therefrom. This disclaimer applies to all forms of media in which extracts from Railway Group Standards may be reproduced. Published by: Rail Safety and Standards Board Evergreen House 160 Euston Road London NW1 2DX Authorised by RSSB on 15 February 2008 Copyright 2008 Rail Safety and Standards Board Limited

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges Issue record Issue Date Comments One 05 April 2008 Original document Replaces GE/GN8573 Guidance on Gauging, issue one, Appendices 1, 2, 3, 4, 5, 6, 7, 8, 10, and 11 Superseded documents The following Railway Group documents are superseded, either in whole or in part as indicated: Superseded documents Sections superseded GE/GN8573 Guidance on Gauging, issue one Appendices 1, 2, 3, 4, 5, 6, 7, 8, 10, and 11 Date when sections are superseded 07 June 2008 Supply Other parts of GE/GN8573, issue one are superseded by GE/GN8573, Guidance on Gauging, issue two. Controlled and uncontrolled copies of this Railway Group Standard may be obtained from the Corporate Communications Department, Rail Safety and Standards Board, Evergreen House, 160 Euston Road, London NW1 2DX, telephone 020 7904 7518 or e-mail enquiries@rssb.co.uk. Railway Group Standards and associated documents can also be viewed at www.rgsonline.co.uk. Page 2 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges Contents Section Description Page Part 1 Purpose and Introduction 5 1.1 Purpose 5 1.2 Introduction 5 Part 2 Application of Standard Vehicle Gauges to Rolling Stock 8 2.1 General requirements for the application of standard vehicle gauges to rolling stock 8 2.2 Application of W6a gauge to rolling stock 9 2.3 Application of W7 gauge to rolling stock 11 2.4 Application of W8 gauge to rolling stock 12 2.5 Application of W9 gauge to rolling stock 12 2.6 Application of W9Plus gauge to rolling stock 14 2.7 Application of W10 gauge to rolling stock 14 2.8 Application of W11 gauge to rolling stock 15 2.9 Application of W12 gauge to rolling stock 16 2.10 Application of C1 gauge to rolling stock 17 2.11 Application of C1 (Appendix A) gauge to rolling stock 18 2.12 Application of UK1 (Issue 2) gauge to rolling stock 19 2.13 Application of locomotive gauge to rolling stock 20 Part 3 Application of Standard Vehicle Gauges to Infrastructure 22 3.1 General requirements for the application of standard vehicle gauges to infrastructure 22 3.2 Application of W6a gauge to infrastructure 23 3.3 Application of W7 gauge to infrastructure 24 3.4 Application of W8 gauge to infrastructure 24 3.5 Application of W9 gauge to infrastructure 25 3.6 Application of W9Plus gauge to infrastructure 25 3.7 Application of W10 gauge to infrastructure 26 3.8 Application of W11 gauge to infrastructure 26 3.9 Application of W12 gauge to infrastructure 27 3.10 Application of C1 gauge to infrastructure 27 3.11 Application of C1 (Appendix A) gauge to infrastructure 28 3.12 Application of UK1 (Issue 2) gauge to infrastructure 29 3.13 Application of locomotive gauge to infrastructure 29 Part 4 Application of this Document 31 4.1 Application infrastructure managers 31 4.2 Application railway undertakings 31 4.3 Health and safety responsibilities 32 Appendices 34 Appendix A W6a Gauge 34 Appendix B W7 Gauge 36 Appendix C W8 Gauge 38 Appendix D W9 Gauge 40 Appendix E W9Plus Gauge 42 Appendix F W10 Gauge 44 Appendix G W11 Gauge 46 Appendix H W12 Gauge 48 Appendix I C1 Gauge 50 Appendix J C1 (Appendix A) Gauge 56 Appendix K UK1 (Issue 2) Gauge 60 RAIL SAFETY AND STANDARDS BOARD Page 3 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges Appendix L Locomotive Gauge 62 Definitions 66 References 69 Tables Table 1 Standard vehicle gauges 6 Table 2 Fastening type tolerances 9 Page 4 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges Part 1 Purpose and Introduction 1.1 Purpose 1.1.1 This Railway Group Standard defines standard vehicle gauges and the associated application rules for rolling stock and for infrastructure. 1.2 Introduction 1.2.1 Gauging requirements in Railway Group Standards 1.2.1.1 A suite of Railway Group Standards mandates requirements for maintaining adequate clearance between the vehicle and adjacent structures, and maintaining adequate passing clearance between the vehicle and other vehicles operating on adjacent tracks, as described below. 1.2.2 GE/RT8270 Assessment of Compatibility of Rolling Stock and Infrastructure 1.2.2.1 GE/RT8270 permits the following gauging techniques to be used when assessing compatibility between infrastructure and rolling stock: a) Absolute gauging b) Gauging to standard vehicle gauges c) Comparative gauging: comparison with vehicles already cleared for the route d) Hybrid gauging. 1.2.2.2 This document defines standard vehicle gauges, and methods of application, for the purpose of assessing compatibility between infrastructure and rolling stock in accordance with GE/RT8270. 1.2.3 GM/RT2149 Requirements for Defining and Maintaining the Size of Railway Vehicles 1.2.3.1 GM/RT2149 mandates the methods of determining, and the requirements for maintaining, the operational envelope of rail vehicles. It mandates the format of the prescribed parameters for defining the size of railway vehicles. 1.2.3.2 GM/RT2149 permits the size of vehicles to be defined by reference to a standard vehicle gauge. 1.2.3.3 This document defines standard vehicle gauges, and methods of application, for the purpose of defining the size of rail vehicles in accordance with GM/RT2149. 1.2.4 GC/RT5212 Requirements for Defining and Maintaining Clearances 1.2.4.1 GC/RT5212 mandates requirements for monitoring and maintaining clearances. It also mandates requirements for new, altered and temporary infrastructure related to clearances; gauging conditions for passage of exceptional loads; standard vehicle gauges; and data relating to gauging and clearances, to be provided to Railway Group members and their suppliers. 1.2.4.2 GC/RT5212 requires that the infrastructure manager defines the standard vehicle gauges to be used for gauging acceptance. However, in response to a proposal by Vehicle / Structures System Interface Committee, the standard vehicle gauges have been documented in this Railway Group Standard () to ensure consistent application. 1.2.5 Supporting documents 1.2.5.1 This Railway Group Standard is supported by GE/GN8573 Guidance on Gauging. RAIL SAFETY AND STANDARDS BOARD Page 5 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 1.2.6 Gauges defined in this document 1.2.6.1 The following standard vehicle gauges are defined in this document: Appendix Vehicle gauge Application A W6a Freight vehicle gauge B W7 W6a extension for 8 0 containers C W8 W6a extension for 8 6 containers D W9 Swapbody wagon-load combination gauge E W9Plus Swapbody wagon-load combination gauge F W10 Wagon-load combination gauge G W11 Wagon-load combination gauge H W12 Wagon-load combination gauge I C1 Vehicle gauge for coaching stock J C1 (Appendix A) Vehicle gauge for coaching stock K UK1 (Issue 2) Vehicle gauge defined in High Speed TSIs (not a gauge for 373/X trains) L Locomotive Vehicle gauge for locomotives Table 1 Standard vehicle gauges 1.2.6.2 The gauges defined in this document are not intended to be exclusive. However, as new gauges are developed, they should be proposed for inclusion within this document to ensure consistent application by railway undertakings and infrastructure managers. 1.2.6.3 A number of the standard vehicle gauges defined in this document are long established gauges and their associated rules have therefore been retained, but adapted to conform to the concepts used in GC/RT5212. For example, W6a gauge retains the traditional static gauge but a dynamic gauge has been added, reflecting characteristics of the established suspensions (see definition) assumed when calculating infrastructure clearances. 1.2.6.4 The gauges defined in this document do not include provision for pantographs, shoe gear, tripcocks and similar equipment designed to come into contact with the infrastructure. These requirements are specified in GM/RT2149. 1.2.7 Gauge coordinates 1.2.7.1 Coordinates for each of the vehicle gauges are provided in the appendices. 1.2.7.2 For clarity, only principal dimensions and nominal numbered points are shown on the associated gauge diagrams. 1.2.7.3 Coordinates relate to the plane of the rails and a datum on the track centre line. 1.2.7.4 For each gauge, static coordinates are provided, which define the maximum gauge to which a vehicle may be built, including vehicle tolerances. 1.2.7.5 For each gauge, coordinates incorporating dynamic movements are provided, which define the maximum envelope that the vehicle is permitted to occupy when operating at up to its maximum speed and cant deficiency. Page 6 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 1.2.7.6 For some gauges, coordinates incorporating dynamic movements together with the effects of a side wind load are provided, which define the maximum envelope that the vehicle is permitted to occupy when operating at up to its maximum speed and cant deficiency, and including the effect of a 35 m/s side wind loading. RAIL SAFETY AND STANDARDS BOARD Page 7 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges Part 2 Application of Standard Vehicle Gauges to Rolling Stock This part is to be read in conjunction with Appendices A to L. 2.1 General requirements for the application of standard vehicle gauges to rolling stock 2.1.1 Application of standard vehicle gauges 2.1.1.1 For a vehicle or vehicle-load combination to be declared as conforming to a standard vehicle gauge listed in 1.2.6, it shall be assessed using the common application rules defined in 2.1 and the specific application rules defined in 2.2 to 2.13. 2.1.2 Construction of vehicles to comply with standard vehicle gauges 2.1.2.1 If a vehicle is to be declared as conforming to a standard vehicle gauge listed in 1.2.6, it shall be built within the static gauge. 2.1.2.2 If the vehicle also uses an established suspension (as defined), it is permissible to declare the vehicle to be compliant with the upper dynamic gauge without further demonstration. 2.1.2.3 The recognised established suspensions for each gauge are given in the section of this document defining that gauge. 2.1.2.4 If the vehicle does not use an established suspension, it is permissible to declare the vehicle to be compliant with the upper dynamic gauge if it can be demonstrated that, at all conditions of speed and cant deficiency, its dynamic envelope remains within that of a vehicle with an established suspension conforming to the required standard vehicle gauge. 2.1.2.5 For gauges having an upper dynamic gauge including the effects of a side wind load, it is permissible to declare the vehicle to be compliant with the upper dynamic gauge, if it can be demonstrated that, at all conditions of speed, cant deficiency and specified wind loading, its dynamic envelope remains within that of a vehicle with an established suspension conforming to the required standard vehicle gauge. 2.1.3 Adjustments for effective position of the track 2.1.3.1 Gauges relate to the effective position of the track, as defined in GC/RT5212. Adjustments for the effective position of the track are taken into account by the application rules for infrastructure. 2.1.4 Adjustments for wheel flange wear and wheel / rail clearance 2.1.4.1 Adjustments for wheel flange wear and wheel / rail clearance are taken into account by the application rules for infrastructure, assuming that the combined wheel flange wear and the nominal wheel / rail clearance do not exceed 12.5 mm. 2.1.4.2 Limits on wheel flange wear and nominal wheel / rail clearance are delivered by compliance with the requirements for wheelsets set out in GM/RT2466. Page 8 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 2.1.5 Adjustments for width reduction on curves 2.1.5.1 Width reductions due to overthrow, where required, shall be calculated using an appropriate methodology. An example of such a methodology is set out in GE/GN8573 which uses the following nomenclature: R is the curve radius in metres A is the bogie centres or axle spacing in metres K is the overthrow allowed, in metres, at the specific curve radius 2.1.5.2 Where width reductions are applied, these shall ensure that vehicle crosssections within and without the bogie centres or wheelbase remain within the gauge. 2.1.6 Adjustments for vertical curvature 2.1.6.1 Vertical curve overthrows shall be calculated using an appropriate methodology. An example of such a methodology is set out in GE/GN8573. 2.1.7 Adjustments for overthrow of bogies 2.1.7.1 Overthrow of bogies shall be considered if the bogie wheelbase of the vehicle exceeds that specified for the gauge. 2.1.8 Tolerances associated with the fixity of fastenings for demountable loads 2.1.8.1 Where demountable loads are carried, the tolerances associated with the fixity of the fastenings used to restrain the loads shall be assumed: Fastening type BR twistlock fastenings Holland autolock fastenings UIC spigots Tolerances 6 mm 6 mm 12.5 mm Table 2 Fastening type tolerances 2.1.8.2 Where new fastenings are introduced, their fixity shall be considered in determining the load position in relation to the gauge. 2.1.8.3 For each of the freight gauges given in Appendices A to H, the fastenings for demountable loads that have been used to define the gauge are stated. Where a different fastening system is used, the vehicle profile shall be adjusted to take into account the difference in the tolerance between the fastening used and that already accommodated by the gauge. 2.2 Application of W6a gauge to rolling stock 2.2.1 Purpose of W6a gauge 2.2.1.1 W6a is a freight vehicle gauge for wagons. The gauge assumes that the wagons have maximum bogie centres or axle spacing of 12.8 m, maximum bogie wheelbase of 2.2 m and a maximum length such that end overthrow does not exceed centre overthrow. Wagons having larger dimensions than these can conform to the gauge by applying width reductions. RAIL SAFETY AND STANDARDS BOARD Page 9 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 2.2.2 The W6a coordinates 2.2.2.1 The W6a coordinates are given in Appendix A, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 2.2.2.2 Coordinate 5P in Appendix A, Table A.3 (highlighted in green) is for on-track machines. 2.2.3 Upper gauge 2.2.3.1 The static upper gauge shall include all parts of the vehicle above 1000 mm ARL including allowances and tolerances, but shall exclude allowances for wheel flange wear and wheel / rail clearance. 2.2.3.2 Established bogies / running gear consistent with the dynamic upper gauge are: a) 3 piece b) Y series c) LTF (low track force) d) TF (track friendly) e) Swing motion f) AM3 (axle motion) g) BR long link h) Friction pedestal i) UIC double link suspension. 2.2.4 Calculation of width reduction on curves for the upper gauge 2.2.4.1 Where the distance between bogie centres or axle spacing exceeds 12.8 m, width reductions shall be applied to both static and dynamic upper gauges. For the methodology set out in GE/GN8573 the gauge width shall be reduced by the difference between the actual maximum overthrow of the vehicle and that given by the following reference values: Curve radius (R) = 200 m Bogie centres or axle spacing (A) = 12.8 m Overthrow at curve radius R (K) = 0.102 m 2.2.5 Dynamic lower gauge 2.2.5.1 All dynamic movement of the items contained in the lower vehicle gauge, including suspension failure conditions, shall be contained within the area bounded by the coordinates incorporating dynamic movements. This shall include: Page 10 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges a) Full lateral suspension travel and wear limits b) Lateral curve overthrows as follows: i) 360 m radius 0 mm (2700 mm maximum width) ii) < 360 m 200 m radius 60 mm (2820 mm maximum width) iii) < 200 m 160 m radius 100 mm (2900 mm maximum width). c) Full downward vertical suspension movements to bumpstop condition and wear d) Vertical curve overthrows in underclearance planes at 75, 100 and 135 mm ARL (points 1 D to 5 D in Appendix A) when on a vertical curve of 500 m radius e) Parts of the vehicle should not come within 25 mm of line joining points 4 D and 5 D in Appendix A, under normal operating conditions, unless it can be demonstrated that under failure conditions this line cannot be infringed f) Radial wheel wear. 2.2.5.2 The following shall not be included: a) Vehicle roll movements b) Axle guard / horn guide deflections c) Wheel flange wear and wheel / rail clearance. 2.2.6 Fastenings for demountable loads 2.2.6.1 W6a gauge assumes the use of BR twistlock fastenings for the carriage of demountable loads. 2.3 Application of W7 gauge to rolling stock 2.3.1 Purpose of W7 gauge 2.3.1.1 W7 freight vehicle gauge is an extension to the W6a gauge to accommodate ISO 8 0 (2438 mm) high containers. 2.3.2 The W7 coordinates 2.3.2.1 The W7 coordinates are given in Appendix B, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 2.3.2.2 Coordinates highlighted in yellow in Appendix B.2, are the upper and lower extensions to the W6a gauge. RAIL SAFETY AND STANDARDS BOARD Page 11 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 2.3.3 Rules for W7 gauge 2.3.3.1 Rules applicable to the W6a gauge, as set out in 2.2.3 to 2.2.6, shall be used for the W7 gauge. 2.3.4 Rules for gauge extensions 2.3.4.1 The lower extension applies only to items not subject to overthrow on curves. In determining the horizontal coordinates for the lower extension, due account shall be taken of all lateral suspension displacements, as set out in 2.2.5. 2.3.4.2 The upper extension applies to the upper gauge. This shall be subject to gauge width reductions, as set out in 2.2.4. 2.4 Application of W8 gauge to rolling stock 2.4.1 Purpose of W8 gauge 2.4.1.1 W8 freight vehicle gauge is an extension to the W6a gauge to accommodate ISO 8 6 (2590 mm) high containers. 2.4.2 The W8 coordinates 2.4.2.1 The W8 coordinates are given in Appendix C, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 2.4.2.2 Coordinates highlighted in yellow in Appendix C.2, are the upper and lower extensions to the W6a gauge. 2.4.3 Rules for W8 gauge 2.4.3.1 Rules applicable to the W6a gauge, as set out in 2.2.3 to 2.2.6, shall be used for the W8 gauge. 2.4.4 Rules for gauge extensions 2.4.4.1 Rules for gauge extensions applicable to the W7 gauge, as set out in 2.3.4, shall be used for the W8 gauge. 2.5 Application of W9 gauge to rolling stock 2.5.1 Purpose of W9 gauge 2.5.1.1 W9 is a freight vehicle gauge that defines the maximum size of wagon-load combinations for UIC S-coded swapbody loads of up to 18.3 m when carried on a W6a compliant wagon with a bogie wheelbase of between 1.8 m and 2.2 m. The gauge assumes that the wagons have maximum bogie centres or axle spacing of 13.5 m. Wagons having larger dimensions than these can conform to the gauge by applying width reductions. Page 12 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 2.5.2 The W9 coordinates 2.5.2.1 The W9 coordinates are given in Appendix D, in three parts: a) Static coordinates of upper gauge (above 780 mm ARL), colour coded black b) Coordinates of upper gauge (above 780 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements, colour coded blue. 2.5.2.2 Items highlighted in yellow in Appendix D.2 only apply to cross-sections between bogie centres. 2.5.3 Upper gauge 2.5.3.1 The upper gauge shall include all parts of the vehicle above 780 mm ARL including allowances and tolerances, but shall exclude allowances for wheel flange wear and wheel / rail clearance. 2.5.3.2 Established bogies / running gear consistent with the dynamic upper gauge are: a) Y series b) LTF (low track force) c) TF (track friendly) d) Swing motion e) AM3 (axle motion) f) UIC double link suspension. 2.5.4 Calculation of width reduction on curves for the upper gauge 2.5.4.1 Where the distance between bogie centres or axle spacing exceeds 13.5 m, width reductions shall be applied to both static and dynamic upper gauges. For the methodology set out in GE/GN8573 the gauge width shall be reduced by the difference between the actual maximum overthrow of the vehicle and that given by the following reference values: Curve radius (R) = 200 m Bogie centres or axle spacing (A) = 13.5 m Overthrow at curve radius R (K) = 0.114 m 2.5.5 Dynamic lower gauge 2.5.5.1 The rules applicable to the W6a gauge, as set out in 2.2.5, shall be used. 2.5.6 Fastenings for demountable loads 2.5.6.1 W9 gauge assumes the use of UIC spigot fastenings for the carriage of demountable loads. RAIL SAFETY AND STANDARDS BOARD Page 13 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 2.6 Application of W9Plus gauge to rolling stock 2.6.1 Purpose of W9Plus gauge 2.6.1.1 W9Plus is a freight vehicle gauge that defines the maximum size of wagon-load combinations for UIC S-coded swapbody loads. This gauge is an extension of the W9 gauge. 2.6.2 The W9Plus coordinates 2.6.2.1 The W9Plus coordinates are given in Appendix E, in three parts: a) Static coordinates of upper gauge, (above 780 mm ARL), colour coded black b) Coordinates of upper gauge (above 780 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements, colour coded blue. 2.6.2.2 Items highlighted in yellow in Appendix E.2 only apply to cross sections between bogie centres. 2.6.3 Rules for W9Plus gauge 2.6.3.1 Rules applicable to the W9 gauge, as set out in 2.5.3 to 2.5.6, shall be used. 2.7 Application of W10 gauge to rolling stock 2.7.1 Purpose of W10 gauge 2.7.1.1 W10 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 2.7.1.2 The basic gauge defines an 18.3 m long ISO 9 6 high x 2500 mm wide load on wagons with bogie centres of up to 14.020 m and with bogie wheelbases of between 1.8 m and 2.2 m and deck heights of up to 945 mm with UIC spigots or 995 mm with BR twistlock fastenings. 2.7.2 The W10 coordinates 2.7.2.1 The W10 coordinates are given in Appendix F, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. 2.7.3 Vehicles built to carry W10 loads 2.7.3.1 Vehicles built to carry W10 loads shall conform to the W6a gauge when not carrying a load. The size and movements of the load when carried on the wagon shall remain within the appropriate envelope under both tare and laden conditions. Page 14 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 2.7.4 Dynamic gauge 2.7.4.1 Wagons with established bogies / running gear consistent with the dynamic gauge are: a) IKA b) FSA c) IFA d) KFA e) KAE f) FFA g) FLA h) IFB i) FCA j) FKA k) FIA l) FTA 2.7.4.2 Further information on the defining vehicles and swept envelope calculation is set out in GE/GN8573. 2.7.5 Fastenings for demountable loads 2.7.5.1 W10 gauge assumes the use of UIC spigot fastenings for the carriage of demountable loads between a height of 995 mm ARL to 3841 mm ARL and BR twistlock fastenings above and below this range of heights. 2.8 Application of W11 gauge to rolling stock 2.8.1 Purpose of W11 gauge 2.8.1.1 W11 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 2.8.1.2 The basic gauge defines an 18.3 m long ISO 9 0 high x 2600 mm wide or 9 6 high x 2550 mm wide containers on wagons with bogie centres of 14.020 m, bogie wheelbases of between 1.8 m and 2.2 m, of up to 980 mm deck height with UIC spigot fastenings or wagons with up to 1000 mm deck height with BR twistlock fastenings. 2.8.2 The W11 coordinates 2.8.2.1 The W11 coordinates are given in Appendix G, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. RAIL SAFETY AND STANDARDS BOARD Page 15 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 2.8.3 Vehicles built to carry W11 loads 2.8.3.1 Vehicles built to carry W11 loads shall conform to the W6a gauge when not carrying a load. The size and movements of the load when carried on the wagon shall remain within the appropriate envelope under both tare and laden conditions. 2.8.4 Dynamic gauge 2.8.4.1 Wagons with established bogies / running gear consistent with the dynamic gauge are: a) FSA b) KFA c) FTA. 2.8.4.2 Further information on the defining vehicles and swept envelope calculation is set out in GE/GN8573. 2.8.5 Fastenings for demountable loads 2.8.5.1 W11 gauge assumes the use of UIC spigot fastenings for the carriage of demountable loads up to a height of 3723 mm ARL for 2600 mm wide loads or to 3876 mm ARL for 2500 mm wide loads. Above these heights, use of BR twistlock fastenings is assumed. 2.9 Application of W12 gauge to rolling stock 2.9.1 Purpose of W12 gauge 2.9.1.1 W12 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 2.9.1.2 The basic gauge defines an 18.3 m ISO 9 6 high x 2600 mm wide load on wagons with bogie centres up to 15.388 m and with bogie wheelbases of between 1.8 m and 2.2 m. It consists of: a) The uppermost portion of the W9 gauge b) The upper portion of the UIC S348 coded profile (set out in GE/GN8573) c) A 2600 mm wide box between 700 mm and 3900 mm ARL, with a 25 mm x 50 mm chamfered upper corner. 2.9.2 The W12 coordinates 2.9.2.1 The W12 coordinates are given in Appendix H, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. 2.9.3 Vehicles built to carry W12 loads 2.9.3.1 Vehicles built to carry W12 loads shall conform to the W6a gauge when not carrying a load. The size and movements of the load when carried on the wagon shall remain within the appropriate envelope under both tare and laden conditions. Page 16 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 2.9.4 Dynamic gauge 2.9.4.1 Wagons with established bogies / running gear consistent with the dynamic gauge are: a) FCA b) KAE c) FIA d) IFA e) IKA f) FKA g) FAA h) FFA i) FGA j) FSA k) FTA l) KFA m) IJA n) KHA. 2.9.4.2 Further information on defining vehicles and swept envelope calculation is set out in GE/GN8573. 2.9.5 Fastenings for demountable loads 2.9.5.1 W12 gauge assumes the use of UIC spigot fastenings. 2.10 Application of C1 gauge to rolling stock 2.10.1 Purpose of C1 gauge 2.10.1.1 C1 is a coaching stock gauge. The maximum size is defined by vehicles of 19.354 m over headstocks with 14.173 m bogie centres and a bogie wheelbase of between 2.591 m and 2.667 m. 2.10.2 The C1 coordinates 2.10.2.1 The C1 construction gauge, consisting of a series of straight lines and circular arcs, is set out in the diagram in Appendix I, Figure I.1. 2.10.2.2 The C1 construction gauge has been converted into numbered points which are within 1 mm of the true circular arcs, and is set out in Appendix I, Figure I.2. This method of presentation is suited to computerised methods of clearance calculation. 2.10.2.3 The C1 coordinates are given in Appendix I, in six parts: a) Static coordinates of upper gauge, colour coded black b) Static coordinates of upper gauge, enlarged for frangible items only, colour coded olive RAIL SAFETY AND STANDARDS BOARD Page 17 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges c) Coordinates of upper gauge, incorporating dynamic movements, colour coded magenta d) Coordinates of upper gauge, enlarged for frangible items only, incorporating dynamic movements, colour coded red e) Coordinates of lower gauge, incorporating dynamic movements, colour coded blue f) Coordinates of lower gauge, only for items on bogie frames between wheelsets, incorporating dynamic movements, colour coded green. 2.10.2.4 The difference in areas defined by a) and b) and by c) and d) is applicable only for frangible items. 2.10.2.5 The area for frangible items shall not be used for comparative gauging. 2.10.2.6 The area for frangible items shall not be used for new vehicles. 2.10.2.7 The difference in areas defined by e) and f) is only permitted for items on bogie frames between wheelsets. 2.10.2.8 Points above 1118 mm ARL on the upper gauges are for vehicles at the upper tolerance (new) limit. 2.10.2.9 Points below 1118 mm ARL on the upper gauges apply to body mounted equipment and shall include the full effects of wear, including wheel tread wear. 2.10.3 Dynamic upper gauge 2.10.3.1 Established bogies consistent with the dynamic upper gauge are: a) BR1 b) BR2 (heavy duty) c) B4 d) B5 (heavy duty) e) Cast Commonwealth bogies 2.10.3.2 Where it is intended to declare the vehicle to be compliant in accordance with 2.1.2.2, the vehicle body parameters (for example mass, inertia, centre of gravity) shall be consistent with those of previous rolling stock design complying with the C1 gauge. 2.10.4 Dynamic lower gauge 2.10.4.1 All dynamic movements of the bogie and bolster shall be contained within the area bounded by the coordinates incorporating dynamic movements colour coded blue in Appendix I. 2.11 Application of C1 (Appendix A) gauge to rolling stock 2.11.1 Purpose of C1 (Appendix A) gauge 2.11.1.1 C1 (Appendix A) is a coaching stock vehicle gauge for vehicles with air suspension. The gauge applies to vehicles of 19.354 m over headstocks with 14.173 m bogie centres and a bogie wheelbase of between 2.591 m and 2.667 m. Page 18 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 2.11.2 The C1 (Appendix A) coordinates 2.11.2.1 The C1 (Appendix A) coordinates are given in Appendix J, in four parts: a) Static coordinates of upper gauge, colour coded black b) Coordinates of upper gauge, incorporating dynamic movements, colour coded red c) Coordinates of lower gauge, incorporating dynamic movements, which includes items not subject to overthrow or with overthrow included, colour coded magenta d) Coordinates of lower gauge, incorporating dynamic movements, colour coded blue. 2.11.2.2 Points above 1118 mm ARL on the upper gauge are for vehicles at the upper tolerance limit. 2.11.2.3 Points below 1118 mm ARL on the upper gauge apply to body mounted equipment and shall include the full effects of wear, including wheel tread wear. 2.11.3 Dynamic upper gauge 2.11.3.1 C1 (Appendix A) assumes the use of specific bogies (based upon the Continental 684 and 732 air springs). Established bogies consistent with the dynamic upper gauge are: a) Series 3, BX1 and BT13 bogies only (that is the original BR versions) b) Series 7 bogies. 2.11.3.2 Where it is intended to declare the vehicle to be compliant in accordance with 2.1.2.2, the vehicle body parameters (for example mass, inertia, centre of gravity) shall be consistent with those of previous rolling stock design complying with the C1 (Appendix A) gauge. 2.11.4 Dynamic lower gauge 2.11.4.1 All dynamic movements of the bogie and bolster shall be contained within the area bounded by the coordinates incorporating dynamic movements colour coded blue in Appendix J. 2.11.4.2 All dynamic movements of any part of the vehicle, including the effects of overthrows, shall be contained within the area bounded by the coordinates of lower gauge incorporating dynamic movements colour coded magenta in Appendix J. 2.12 Application of UK1 (Issue 2) gauge to rolling stock 2.12.1 Purpose of UK1 (Issue 2) gauge 2.12.1.1 UK1 (Issue 2) gauge is the GB specific case for the application of the High Speed Technical Specification for Interoperability (TSI). Its derivation is based upon vehicles with 17 m bogie centres and 24.024 m length of full body width. Vehicles having larger dimensions than these can conform to the gauge by applying width reductions. RAIL SAFETY AND STANDARDS BOARD Page 19 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 2.12.2 The UK1 (Issue 2) coordinates 2.12.2.1 The UK1 (Issue 2) coordinates are given in Appendix K, in three parts: a) Static coordinates of upper gauge, colour coded black b) Coordinates of upper gauge, incorporating dynamic movements, colour coded red c) Coordinates of lower gauge, incorporating dynamic movements, colour coded blue. 2.12.2.2 The area bounded by points 15 D to 18 D, highlighted yellow in Appendix K.2 and hatched blue on the diagram in Appendix K, is only available for use by footsteps. 2.12.3 Calculation of width reduction on curves for the upper gauge 2.12.3.1 Where the distance between bogie centres exceeds 17 m, width reductions shall be applied to both static and dynamic upper gauges. For the methodology set out in GE/GN8573 the gauge width shall be reduced by the difference between the actual maximum overthrow of the vehicle and that given by the following reference values: Curve radius (R) = 200 m Bogie centre spacing (A) = 17 m Overthrow at curve radius R (K) = 0.181 m 2.12.4 Dynamic lower gauge 2.12.4.1 The dynamic lower gauge shall include all dynamic movements, wear and lateral and vertical overthrows. 2.12.4.2 Points 12 D to 19 D may be widened laterally on curves of less than 360 m radius according to the following formula: dx = (26000 / R) 72 Where R is the curve radius in metres and dx is the width increase in mm. 2.12.4.3 Under loading and wear conditions, the vehicle shall not infringe the gauge underclearance when on a concave or convex vertical curve of 500 m radius using an appropriate methodology. An example of such a methodology is set out in GE/GN8573. 2.13 Application of locomotive gauge to rolling stock 2.13.1 Purpose of locomotive gauge 2.13.1.1 Locomotive gauge is a vehicle gauge for locomotives. 2.13.2 The locomotive coordinates 2.13.2.1 The locomotive coordinates are given in Appendix L, in four parts: a) Static coordinates of gauge, colour coded blue b) Coordinates of gauge, incorporating dynamic movements, colour coded purple c) Static coordinates of gauge, for items not subject to overthrow on curves, colour coded black Page 20 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges d) Coordinates of gauge, incorporating dynamic movements for items not subject to overthrow on curves, colour coded red. 2.13.3 Calculation of width reduction for static and dynamic gauge 2.13.3.1 Where the distance between bogie centres exceeds 12.806 m, width reductions shall be applied to both static and dynamic gauge coordinates a) and b). For the methodology set out in GE/GN8573 the gauge width shall be reduced by the difference between the actual maximum overthrow of the vehicle and that given by the following reference values: Curve radius (R) = 200 m Bogie centre spacing (A) = 12.806 m Overthrow at curve radius R (K) = 0.1025 m 2.13.3.2 Coordinates subject to overthrow, a) and b), shall include upward and downward curve overthrows on a vertical curve of 500 m radius. RAIL SAFETY AND STANDARDS BOARD Page 21 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges Part 3 Application of Standard Vehicle Gauges to Infrastructure This part is to be read in conjunction with Appendices A to L 3.1 General requirements for the application of standard vehicle gauges to infrastructure 3.1.1 Application of standard vehicle gauges 3.1.1.1 For a route or section of route to be declared as cleared for a standard vehicle gauge listed in 1.2.6, it shall be assessed using the common application rules defined in 3.1 and the specific application rules defined in 3.2 to 3.13. 3.1.2 Adjustments for effective position of the track and overthrow on curves 3.1.2.1 Coordinates for each of the vehicle gauges relate to the effective position of the track which is defined in GC/RT5212. Coordinates therefore do not include the effect of lateral and vertical track alignment tolerances, continuous cross-level error, wheel / rail clearance, rail sidewear, or any other infrastructure tolerances. 3.1.2.2 Gauges shall be enlarged to accommodate the overthrow effects of track curvature, both laterally and vertically. 3.1.2.3 For each gauge, formulae are provided to calculate overthrow on curves, which use the following nomenclature: T i is the overthrow towards the centre of the curve in mm T o is the overthrow towards the outside of the curve in mm R is the curve radius in metres 3.1.2.4 In the calculations for overthrow, formulae are presented in simplified form. It is permissible to use an alternative method for the calculation of overthrows; an example of such a method is set out in GE/GN8573. 3.1.3 Clearances required 3.1.3.1 Clearances required are set out in GC/RT5212. 3.1.3.2 Clearances shall be calculated in relation to the dynamic coordinates. 3.1.3.3 Clearances shall be adjusted to include the effects of wheel / rail clearance. 3.1.3.4 In exposed locations, clearances shall be calculated in relation to the coordinates incorporating dynamic movements with side wind loading (where these are provided), in the appropriate direction. 3.1.4 Requirements for wheel / rail clearance 3.1.4.1 Clearances shall be adjusted to include the effects of 12.5 mm of wheel / rail clearance. Page 22 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 3.2 Application of W6a gauge to infrastructure 3.2.1 Purpose of W6a gauge 3.2.1.1 W6a is a freight vehicle gauge. 3.2.2 The W6a coordinates 3.2.2.1 The W6a coordinates are given in Appendix A, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 3.2.2.2 Coordinate 5P in Appendix A, Table A.3 (highlighted in green) is for on-track machines. 3.2.3 Rules for the calculation of overthrow on curves 3.2.3.1 The W6a dynamic upper gauge shall be adjusted for horizontal and vertical curve overthrow using the following formulae: T i = 21085 / R T o = 20480 / R 3.2.3.2 The W6a dynamic lower gauge shall not be adjusted for horizontal curve overthrow on curves of greater than (or equal to) 360 m radius. 3.2.3.3 The W6a dynamic lower gauge shall be adjusted for horizontal curve overthrow on curves of less than 360 m radius and greater than (or equal to) 200 m radius using the following formulae: T i = ( 27000 / R ) - 75 T o = ( 27000 / R ) - 75 3.2.3.4 The W6a dynamic lower gauge shall be adjusted for horizontal curve overthrow on curves of less than 200 m radius and greater than (or equal to) 160 m radius using the following formulae: T i = ( 32000 / R ) - 100 T o = ( 32000 / R ) - 100 3.2.3.5 The W6a dynamic lower gauge shall be adjusted for vertical curve overthrow on curves of less than 500 m radius using the following formulae: T i = 21085 / R T o = 20480 / R 3.2.4 Requirements for additional clearance to the W6a dynamic upper gauge 3.2.4.1 The clearances required in GC/RT5212 to the W6a dynamic upper gauge shall be increased by 20 mm on horizontal curves of between 160 m and 200 m radius. RAIL SAFETY AND STANDARDS BOARD Page 23 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 3.3 Application of W7 gauge to infrastructure 3.3.1 Purpose of W7 gauge 3.3.1.1 W7 freight vehicle gauge is an extension to the W6a gauge to accommodate ISO 8 0 (2438 mm) high containers. 3.3.2 The W7 coordinates 3.3.2.1 The W7 coordinates are given in Appendix B, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 3.3.2.2 Coordinates highlighted in yellow in Appendix B.2, are the upper and lower extensions to the W6a gauge. 3.3.3 Rules for the calculation of overthrow on curves 3.3.3.1 Rules applicable to the W6a gauge, as set out in 3.2.3 to 3.2.4, shall be used for the W7 gauge. 3.3.3.2 No overthrow shall be applied to the lower extension. 3.3.4 Requirements for additional clearance to the W7 dynamic upper gauge 3.3.4.1 Rules applicable to the W6a gauge, as set out in 3.2.4, shall be used for the W7 gauge. 3.4 Application of W8 gauge to infrastructure 3.4.1 Purpose of W8 gauge 3.4.1.1 W8 freight vehicle gauge is an extension to the W6a gauge to accommodate ISO 8 6 (2590 mm) high containers. 3.4.2 The W8 coordinates 3.4.2.1 The W8 coordinates are given in Appendix C, in three parts: a) Static coordinates of upper gauge (above 1000 mm ARL), colour coded black b) Coordinates of upper gauge (above 1000 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements colour coded blue. 3.4.2.2 Coordinates highlighted in yellow in Appendix C.2, are the upper and lower extensions to the W6a gauge. 3.4.3 Rules for the calculation of overthrow on curves 3.4.3.1 Rules applicable to the W6a, as set out in 3.2.3 to 3.2.4, shall be used for the W8 gauge. 3.4.3.2 No overthrow shall be applied to the lower extension. Page 24 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 3.4.4 Requirements for additional clearance to the W8 dynamic upper gauge 3.4.4.1 Rules applicable to the W6a gauge, as set out in 3.2.4, shall be used for the W8 gauge. 3.5 Application of W9 gauge to infrastructure 3.5.1 Purpose of W9 gauge 3.5.1.1 W9 is a freight vehicle gauge that defines the maximum size of wagon-load combinations for UIC S-coded swapbody loads when carried on a W6a compliant wagon. 3.5.2 The W9 coordinates 3.5.2.1 The W9 coordinates are given in Appendix D, in three parts: a) Static coordinates of upper gauge (above 780 mm ARL), colour coded black b) Coordinates of upper gauge (above 780 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements, colour coded blue. 3.5.2.2 Items highlighted in yellow in Appendix D.2, only apply to cross sections between bogie centres. 3.5.3 Rules for the calculation of overthrow on curves 3.5.3.1 The W9 upper gauge shall be adjusted for horizontal and vertical curve overthrow using the following formulae: T i = 23386 / R T o = 18675 / R 3.5.3.2 Rules applicable to the W6a dynamic lower gauge, as set out in 3.2.3.2 to 3.2.3.5, shall be used for W9 dynamic lower gauge. 3.5.4 Requirements for additional clearances to the W9 dynamic upper gauge 3.5.4.1 Rules applicable to the W6a gauge as set out in 3.2.4, shall be used for the W9 gauge. 3.6 Application of W9Plus gauge to infrastructure 3.6.1 Purpose of W9Plus gauge 3.6.1.1 W9Plus is a freight vehicle gauge that defines the maximum size of wagon-load combinations for UIC S-coded swapbody loads. This gauge is an extension of the W9 gauge. 3.6.2 The W9Plus coordinates 3.6.2.1 The W9Plus coordinates are given in Appendix E, in three parts: a) Static coordinates of upper gauge, (above 780 mm ARL), colour coded black b) Coordinates of upper gauge (above 780 mm ARL), incorporating dynamic movements, colour coded red c) Coordinates of lower gauge (below 1000 mm ARL), incorporating dynamic movements, colour coded blue. RAIL SAFETY AND STANDARDS BOARD Page 25 of 69

Railway Group Standard Document Withdrawn as of 05/12/2009 Uncontrolled When Printed Standard Vehicle Gauges 3.6.2.2 Items highlighted in yellow in Appendix E.2 only apply to cross sections between bogie centres. 3.6.3 Rules for the calculation of overthrow on curves 3.6.3.1 Rules applicable to the W9 gauge, as set out 3.5.3 to 3.5.4, shall be used. 3.6.4 Requirements for additional clearances to the W9Plus dynamic upper gauge 3.5.4.1 Rules applicable to the W6a gauge, as set out in 3.2.4, shall be used for the W9Plus gauge. 3.7 Application of W10 gauge to infrastructure 3.7.1 Purpose of W10 gauge 3.7.1.1 W10 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 3.7.1.2 W10 gauge is designed to accommodate ISO 9 6 high x 2500 mm wide loads. 3.7.2 The W10 coordinates 3.7.2.1 The W10 coordinates are given in Appendix F, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. 3.7.3 Rules for the calculation of overthrow on curves 3.7.3.1 The W10 gauge shall be adjusted for horizontal and vertical curve overthrow using the following formulae: T i = 25175 / R T o = 16886 / R 3.8 Application of W11 gauge to infrastructure 3.8.1 Purpose of W11 gauge 3.8.1.1 W11 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 3.8.1.2 W11 gauge is designed to accommodate ISO 9 0 high x 2600 mm wide or 9 6 high x 2550 mm wide loads. 3.8.2 The W11 coordinates 3.8.2.1 The W11 coordinates are given in Appendix G, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. Page 26 of 69 RAIL SAFETY AND STANDARDS BOARD

Standard Vehicle Gauges 3.8.3 Rules for the calculation of overthrow on curves 3.8.3.1 The W11 gauge shall be adjusted for horizontal and vertical curve overthrow using the following formulae: T i = 25175 / R T o = 16886 / R 3.9 Application of W12 gauge to infrastructure 3.9.1 Purpose of W12 gauge 3.9.1.1 W12 gauge defines the maximum size of a load when carried on a W6a compliant wagon. 3.9.1.2 W12 gauge is designed to accommodate ISO 9 6 high x 2600 mm wide loads. 3.9.2 The W12 coordinates 3.9.2.1 The W12 coordinates are given in Appendix H, in three parts: a) Static coordinates of gauge, colour coded black b) Coordinates of gauge, incorporating dynamic movements, colour coded red c) Coordinates of gauge, incorporating dynamic movements, which includes the effects of a 35 m/s side wind load, colour coded green. 3.9.3 Rules for the calculation of overthrow on curves 3.9.3.1 The W12 gauge shall be adjusted for horizontal and vertical curve overthrow using the following formulae: T i = 30204 / R T o = 16886 / R 3.10 Application of C1 gauge to infrastructure 3.10.1 Purpose of C1 gauge 3.10.1.1 C1 is a coaching stock gauge. 3.10.2 The C1 coordinates 3.10.2.1 The C1 coordinates are given in Appendix I, in six parts: a) Static coordinates of upper gauge, colour coded black b) Static coordinates of upper gauge, enlarged for frangible items only, colour coded olive c) Coordinates of upper gauge, incorporating dynamic movements, colour coded magenta d) Coordinates of upper gauge, enlarged for frangible items only, incorporating dynamic movements, colour coded red e) Coordinates of lower gauge, incorporating dynamic movements, colour coded blue f) Coordinates of lower gauge, only for items on bogie frames between wheelsets, incorporating dynamic movements, colour coded green. RAIL SAFETY AND STANDARDS BOARD Page 27 of 69