CHAPTER VIII

DRAWINGS, SPECIFICATIONS AND BOOKS OF REFERENCE

SECTION 'A' 

Plan of New and working installations 

8.1. Preparation—General Procedure :

8.1.1. All plans shall be prepared in accordance with the instructions issued by the Chief Signal and Telecommunication Engineer.

8.1.2. The names of the junction or terminal stations should be noted on plans, that on the left hand side being the one from which the kilometre progressively increases. The names of the adjacent block stations and mid-section sidings should also be indicated on the plans as also their respective distances from the center line of the station for which the plan is prepared.

8.1.3. Standard drawings shall not be departed from without the specific permission of the Chief Signal and Telecommunication Engineer.

8.1.4. The Signal and Telecommunication Engineer in charge should ensure that drawings submitted with an estimate for a work are complete and include all information necessary—

(i) For the proper understanding of the scheme, relevant notes being written on the drawings ; and 

(ii) For proper check of the design and estimate.

When part of the work has to be done to a standard plan or to an existing drawing, the fact should be stated . Such drawings need not be reproduced. If part of the information necessary has to be supplied by another department, the officer-in-charge should obtain and incorporate the details on the drawing.

8.1.5. The north point should be shown on every signalling plan.

8.1.6. All drawings should be quoted by number in their proper place in the estimate and in the covering letter accompanying the estimate.

8.1.7. Tentative signalling plans prepared for estimating purposes should bear the legend : "Tentative—For estimating purposes only". Tentative signalling plans issued for tender purposes should bear the legend : " Tentative—For Tender purposes only". Tentative signalling plan sent to Divisions for comments should bear the legend : " Tentative—For comments only ". All tentative plans should be signed by at least a Senior Scale Officer.

8.2. Plans for other Departments :

8.2.1. The Divisional/Senior Signal and Telecommunication Engineer may at his discretion prepare sketches for officers of other Departments or for Deposit Works. No detailed plans for Deposit Works should be prepared except on receipt of orders from the Chief Signal and Telecommunication Engineer.

8.2.2. The Divisional/Senior Signal and Telecommunication Engineer should obtain complete details from officers of other Departments when preparing plans that affect those departments and embody their requirements on the plans, if considered necessary. He should arrange for the plans, to be signed by the representative of the department concerned in token of approval.

8.3. General practice and sizes of Drawings :

8.3.1. The code of Practice for General Engineering drawings and the standard sizes of drawings— IS. 696 shall be followed as far as practicable.

8.3.2. In preparing plans or making ferro prints, wastage of drawing paper, tracing paper, tracing cloth and ferro paper should be avoided.

8.3.3. The following considerations govern the size of a drawing—.

(i) Folding, approximately to foolscap size to accompany correspondence and reports, 

(ii) The commercial size of drawings, tracing and ferro paper rolls and tracing cloth rolls.

8.3.4. The following sizes may be considered convenient, the tracing paper/cloth being cut to the outer dimensions shown:—

Size I.S.I. standard Measurement including Border Border
'A'     'B'          'U'       'C'       'D'       'W' A-4                     A-3                     --                        A-2                    A-1                     -- 210 mm. x 297 mm.                                                                              297 mm. x 420 mm                                                                              297 mm. x Any length                                                                          420 mm. x 594 mm.                                                                             594 mm. x 841 mm                                                                             841 mm. x Any length     10 mm.    10 mm.     10 mm.     10 mm.     10 mm.     10 mm.

On left hand side of each drawing, an extra margin of 30 mm. should be allowed of binding.

Size ' A ' may be adopted for preparation of sketches. Size 'B' may be adopted for Locking Tables and Selection Tables. Size ' U ' may be adopted for Locking Diagrams. For Signalling plans, any size as convenient may be adopted.

8.3.5. Drawings for a large project should be bound together, each such drawing should be marked as sheet 1,2 and so on as also the total number of sheets (e.g., 1/3, 2/3, 3/3) and bear in the proper place, the separate numbers by which each is identified. These numbers should be entered in the Office Register of Drawings and should also be marked on the outside bindings.

8.4. Titles and numbering of Drawings:

8.4.1. The title and number may be placed at the bottom right hand corner of the plan, sufficient space being left for " Notes " to be entered as necessary.

8.4.2. Drawings pertaining to any station, viz., Signalling plans, Locking Tables/Selection Tables, Locking diagrams, wiring diagrams etc. shall bear the same number. ,

8.4.3. If more than one sheet is used for a particular work, each must be distinguished by the sheet number as indicated in Para 8.3.5 immediately following the drawing number. The title may be placed below the number. If the drawing cancels the previous one, a note to this effect and the number of the cancelled drawing should be recorded at the right hand top corner of the drawing

8.4.4 Every plan should bear in small letters at the lower left hand corner, the name and initials of the Technical Assistant or Superintendent, Drawing Office, Head Draftsman/Draftsman and Tracer who prepared and checked the plan.

8.4.5. All signatures in tracings should be in indelible ink. All signature should be dated with date month and year.

8.5. Scale of Drawings.—It is desirable that signalling plans are prepared to the scales—

(i) 10 metres to a centimetre (1/1000) longitudinal;

(ii) 5 metres to a centimetre (1/500) transverse.

8.6. Details on Drawings :

8.6.1. All dimensions and distances shall be written carefully upon that part of the drawing to which they refer. The distance to be embraced by the figures shall be indicated by arrow heads. Figuring and descriptive matter should be so printed that without moving the plan, it can be read with ease.

8.6.2. The following information should invariably be shown on signalling plans:— 

(i) Standard of interlocking and class of station, 

(ii) Holding capacity of all running lines and sidings.

(iii) Direction of reception and despatch on running lines and description of sidings, 

(iv) Restriction on dead-end sidings (e. g., No stabling) if any.

(v) All gradients within the station limits and upto 2.5 kilometres in rear of first stop signal, 

(vi) Kilometrege and class of level crossings within the station limits, whether interlocked or not, 

(vii) Type of Block Working with adjacent station and location of block Instruments, 

(viii) Up and Down directions and names of important junctions on either side.

(ix) Reference to condonation of gradient infringements, CRS's dispensation for deviations from General Rules/Signal Engineering Manual, if any.

(x) Reference to approved Engineering plan on which the signalling plan is based.

(xi) Note regarding telephone communication provided between A. S. M./Cabinman and level crossings within and outside station limits.

(xii) Aspect sequence chart for colour light signals.

(xiii) Whether turnout is 1 in 8-1/2 or 1 in 12 or 1 in 16 etc.

(xiv) Details of Detection Table etc., which are not apparent in the plan.

(xv) Details of Track Circuits/Axle Counter/Treadles.

(xvi) Intestinal distances and distance between Warning Boards and Signals.

(xvii) Details of open bridges.

(xviii) Location of water column, ash pit/tray.

(xix) Signal overlap in big yards.

(xx) Custody of spare keys.

(xxi) Date of commissioning the installation.

8.7. Check and issue of Drawings :

8.7.1. Signalling Plans and Locking Tables/Selection Tables shall be checked in full by both Assistant Signal and Telecommunication Engineer and Senior Signal and Telecommunication Engineer before they are approved and signed by an officer in Junior Administrative grade or above, authorised by the Chief Signal and Telecommunication Engineer.

8.7.2. Locking Diagram for lever frames having more than 50 levers shall checked and approved as required in Para 8.7.1. Locking Diagram for lever frames having upto 50 levers, cable plans and power supply distribution diagrams shall be checked in full by Assistant Signal and Telecommunication Engineer before they are approved and signed by Divisional Signal and Telecommunication Engineer/Senior Signal and Telecommunication Engineer.

8.7.3. Circuit Diagrams for inter cabin control and automatic signalling  shall be checked in full by Assistant Signal and Telecommunication Engineer and Senior Signal and Telecommunication Engineer before they are approved and signed by Deputy Chief Signal and Telecommunication Engineer. Detailed wiring diagrams for individual stations prepared on the basis of these typical circuit diagrams should be checked in full by Assistant Signal and Telecommunication Engineer and Divisional Signal and Telecommunication Engineer or Senior Signal and Telecommunication Engineer who may approve and sign them.

8.7.4. For major signalling schemes, including power and electromechanical signalling.—

(i) Typical circuit diagrams for various circuit elements, such as route locking approach locking, sectional route release, point control, interlocking relay control, signal proving and lighting, etc., will be checked in full by both Divisional/Senior Signal and Telecommunication Engineer and Deputy Chief Signal and Telecommunication Engineer before they are approved and signed by Chief Signal and Telecommunication Engineer.

(ii) The detailed circuit and wiring diagrams, including those submitted by the Contractors or firms for individual schemes shall be checked in full by both Assistant Signal and Telecommunication Engineer and Divisional/Senior Signal and Telecommunication Engineer before they are approved and signed by an Officer in junior Administrative grade or above, authorised by the Chief Signal and Telecommunication Enginee..

8.8. Completion Drawings;

8.8.1. The Signal and Telecommunication Engineer-in-charge of Construction should submit signed ferro copies to the Chief Signal and Telecommunication Engineer for works completed. These should indicate the work as actually carried out including the dimensional details as actually measured at site, location of signals, details of cables laid, wiring diagram, locking diagram etc.

8.8.2. On receipt of these drawings, the original tracings will be amended in the Office of Chief Signal and Telecommunication Engineer and marked "Completion Drawing". Requested number of copies of the completion drawing will be sent to the office of Divisional Signal and Telecommunication Engineer.

8.9. Supply of Plans ;

8.9.1. Plans of working installations- In addition to the Standard drawings, each Divisional Signal and Telecommunication Engineer/Assistant Signal and Telecommunication Engineer shall have copies of the following diagrams and charts of working installations :

(i) Engineering/Plan and Signalling Plan for each interlocked station including interlocked level crossings situated outside station limits and interlocked mid-section sidings.

(ii) Working Rule diagram where issued for each station including interlocked level crossings outside station limits.

(iii) Locking Table and Locking diagrams of each interlocking frame, Station Master's slide control frame, interlocking key box, power frame with mechanical locking.

(iv) Selection Tables for each electromechanical/Relay interlocked station,

(v) Panel diagram

(vi) Diagrams of track circuits for each yard showing complete layout and diagrams of individual track circuit showing location of insulation joints, jumpers, relay and feed ends, polarity, length, traction, bonds, etc.

(vii) Diagrams of connections at track, line and other relays, as necessary for each track circuited yard ;

(viii) Diagram; of electrical signalling and power signalling circuits for each yard.

(ix) Diagrams of single and double line block instrument circuits.

(x) Diagrams of Location/Junction boxes showing description of wires at terminals for each yard.

(xi) Arrangement of relays in relay racks and contact analysis sheet for Relay Interlocked stations ;

(xii) Diagrams showing connections of power supply panels for each power supply installation. 

(xiii) Cable route plan showing disposition of underground cables for each yard.

(xiv) Disposition charts of overhead lines for control telephones, block instruments, administrative trunks, telegraph and other railway circuits.

(xv) Disposition charts of overhead lines for circuits such as electrical reverses, key transmitters and other circuits under the charge of each inspector.

8.9.2. Sectional Signal Inspectors and Supervisory Signal Inspectors shall be supplied with copies of the above mentioned Drawings and charts.

8.9.3. Ai stations provided with electro-mechanical signalling or centralised operation of points and signals, a set of signalling plans, locking/selection tables, locking diagrams and wiring diagram, cable route plan etc. may be kept at the station for reference by the maintenance staff.

8.9.4. While signalling plans, locking tables, selection tables and wiring diagrams shall be supplied by Headquarters Office, other plans mentioned in Para 8.9.1 shall be prepared by Divisional Signal and Telecommunication Engineer (Construction) or (Maintenance) as the case may be. Signalling plans for non-interlocked stations shall be prepared by Divisional Signal and Telecommunication Engineer (Construction) or (Maintenance) as the case may be.

8.10. Care and file of tracings.

8.10.1. Tracings shall not be used for reference as they are apt to get lost or damaged. Required number of ferro-prints should be supplied to Officers and Inspectors. Each particular file should contain a ferro-print of the works relating to it.

8.10.2. Should it be necessary to send a tracing from one office to another, it shall be rolled and inserted in a cardboard cylinder.

8.10.3. Ferros should be folded concertina fashion and shall when folded measure approximately 210 mm x 300 mm. The folding should be arranged so as to make visible the title of the plan without unfolding the plan. When prints are rolled for despatch, they should be rolled with the working side outwards.

8.10.4. The Records section of each Drawing Branch may file every tracing and original drawing on the basis of the subject classification and the index card filing system. Each drawer of the index card cabinet should be distinguished by a classification number: each card should be complete as regards title of the drawing, other connected drawings, file reference and the drawer number in which the original is stored.

8.10.5. The storage-drawers should have placards on the outside indicating the contents in each. The plans should be stored flat in shallow drawers of convenient dimensions. Probability of damage by moths or white ants should be guarded against.

SECTION' B '

 Standard Drawings 

8.11 Indian Railway Standard Drawings.

8. 11.1. Indian Railway Standard Drawings, designated by the code word I. R. S. have been issued by the Director-General, Research Designs and Standards Organisation, Ministry of Railways, Lucknow. The signal drawings are marked IRS. (S)—" S " stands for " Signal ". The particulars of the drawings and their reference numbers are detailed in an "Index of Indian Railway Standard Signalling and Interlocking Drawings—IRS. (S)". This index shows all the IRS. (S) drawings arranged alphabetically, as well as serially, in the order of their numbers. Each drawing number is either prefixed with letters ' SA ' or letter I S ' ' SA ' stands for a signal assembly and ' S ' stands for a part of a signal assembly.

8.11.2. New designs and drawings which are accepttd for adoption as standards have the word " Advance " suffixed to their number e.g. S-8716 (Advance), pending their final adoption as Indian Railway Standard Drawings. For such drawings the manufacturers shall have a sample approved by the purchaser before undertaking the bulk manufacture.

8.12. Supply of Standard Drawings :

8.12.1. A set of all I. R. S. (S) drawings shall be supplied to the office of each Divisional Signal and Telecommunication Engineer, Assistant Signal and Telecommunication Engineer and to each Inspector as required.

8.12.2. I. R. S. drawings should not be traced by the Zonal Railway. Copies in reproduction tracings should be obtained from the Director General, Research, Designs and Standards Organization (Signal and Telecommunication), Ministry of Railways, Lucknow, whenever required. 

SECTION ' C ' 

Specifications 

8.13—Indian Railway Standard Specifications.—Specifications for materials used for signalling purpose have been drawn out by the Director, Research General, Designs and Standard Organisation, Ministry of Railways, Lucknow and are titled as " Indian Railways Standards Specifications". These specifications are issued under a fixed serial number e. g. S-12-54, the letter " S " denoting " Signals " the number " 12 " representing the serial number of the specifications and the final number " 54 " indicating the year of original adoption as standard, or in the case of revision, the year of last revision. A list of I. R. S. Signal specification is at Annexure " 34 ".

8.14.—Other Specifications.—-Specifications issued by the British Standards Institution, the Indian Standards Institution and the British Railway Board have also been adopted for items of equipment used for signaling purposes for which no I. R. S. specification exists. Some of these specifications pertaining to items in common use are detailed in Annexure '' 35 "

8 15.—Supply of Specifications.—Each Divisional Signal and Telecommunication Engineer and Assistant Signal and Telecommunication Engineer should have a copy of all Indian Railway Standard (Signal) specifications in his office. Copies of such British Standard and Indian Standard specifications that are generally required may also be kept. He should also have a copy of all specifications issued by Chief Signal and Telecommunication Engineer for local use.

8.16.—Availability—

8.16.1. Indian Railway Standard Specifications are obtainable from the Manager of Publications, Civil Lines/Delhi-6.

8.16.2 Indian Standard Specifications are obtainable from the Indian Standards Institution, Manak Bhavan, Bhadur Shah Zafar Marg, New Delhi, or its branch offices at Bombay, Calcutta, Madras, Hyderabad, Kanpur and Bangalore.

8.16.3 British Standard Specifications may be purchased from Indian Standard Institution Offices at New Delhi, Bombay, Calcutta and Madras.

SECTION 'D'

 Books of Reference

8.17 Books of Reference—Scale of.—Books of reference should be supplied to Officers, Inspectors and Maintainers for their personal use, as well as for use in their officers. A statement showing the various books and their distribution is at Annexure - 36 .

8.18 Reports of Signal Standards Committee, Technical papers and Journals.—Each Divisional Signal and Telecommunication Engineer should arrange to have the under mentioned technical literature in the Divisional Library.—

(i) Reports of the Signal Standards Committee.

(ii) Proceedings and Technical papers issued by the Institution of Railway Signal and Telecommunication Engineers, New Delhi.

(iii) I. R. S. specifications, British Standard specifications, Indian Standards specifications, specifications of the Association of American Rail Roads Signal section relating to Signalling and Telecommunication equipment as required.

(iv) Quarterly Technical Bulletin and other technical papers on Signalling and Telecommunication matters published by the Research, Designs and Standards Organization/Lucknow.

(v) Notes published by Indian Railways Institute of Signal, Engineering and Telecommunications, Secunderabad.

(vi) Technical books and journals of interest on Signalling and Telecommunication.

SECTION ' E ' 

Maintenance of Drawings, Specifications and Books of Reference

3.19 Folders.—Standard drawings, plans of working installations and specifications should be maintained in a book form separately bound in suitable folders.

8.20 Addenda and Corrigenda.

8.20.1 I. R. S. Drawings and Specifications.—A quarterly notification is issued by the Director General, Research, Designs and Standards Organization. It gives the details of the new Indian Railway Standard Specifications and drawings issued and also those which have either been modified or cancelled during the quarter covered by the notification.

8-20-2 British Standard Specifications.—British Standard Year Book is published by the British, Standards Institution, Victoria Street, London S. W. I. It contains a list of up-to-date British Standards in numerical order and also gives a brief description of each.

8.20.3. Indian Standards Specifications.—The I. S. I. Hand Book of Publications contains up to-date list of Indian Standards and is available from the Indian Standards Institution, Bahadur Shah Zafar Marg, New Delhi, or any of its branch offices at Bombay, Calcutta, Madras, Hyderabad, Kanpur and Bangalore.

8.20.4. Standard Drawings and Plans of working Installations.—Railway should publish lists of standard drawing as also lists of plans of working installations for the information of the staff. Addenda and Corrigenda slips should be issued to these lists regularly once in six months incorporating particulars of drawings and plans issued, modified or cancelled.

8.20.5. Books of reference.—Addenda and Corrigenda slips to the books of reference are issued from time to time by the Railway Board and the Railways, as the case may be.

8.21. Accountal.—All Indian Railway Standard drawings and Specifications, British Standard and Indian Standard Specifications as well as books of reference must be accounted for in the same way as tools and plant items ;

8.22. Responsibility.—

8.22.1. All officials to whom books of reference have been supplied shall be responsible for— 

(i) their safe custody and good order ;

(ii) pasting all addenda and corrigenda slips promptly and seeing that these are up-to-date to the last slip as modified from time-to-time.

(iii) returning all books issued to them for personal use prior to retirement.

8.22.2. Each Inspector shall be responsible to see that—

(i) the standard drawings and plans of working installations are properly maintained and kept up-to-date in respect of new drawings issued and old ones cancelled;

(ii) the staff working under him understand and carry out work in accordance with standard drawings and plans of working installations . Any mistake in drawings and plans that may come to his notice should be promptly intimated to the Divisional Signal and Telecommunication Engineer for arranging correction; and

(iii) the staff under them maintain their books of reference up-to-date and in good order.

8.22.3. Each Divisional Signal and Telecommunication Engineer shall be responsible to see that—

(i) the standard drawings, plans and specifications in his custody are kept up-to-date and that the obsolete and cancelled ones are destroyed.

(ii) all inspectors keep their standard drawings and plans up-to-date.

(iii) the staff properly understand and carry out work in accordance with the standard drawings and plans.

(iv) Any mistake in the standard drawings, working plans and specifications, which comes to his notice, is promptly intimated to the Chief Signal and Telecommunication Engineer for arranging necessary correction.

(v) each Divisional Signal and Telecommunication Engineer shall make periodical check to see that Inspectors maintain their books of reference up-to-date and in good order, He should encourage his Inspectors and other staff to study reports, proceedings, papers and journals mentioned in Para 8.18 so as to enhance their knowledge and to keep themselves informed about the up-to-date developments, methods and technique in Railway Signalling and Telecommunications.

SECTION 'F'

 Indian Railway Standard Equipment

8.23. Indian Railway Standard Designs.—Where Indian Railway Standard designs exist, they should invariably be followed for all new works and no modification of such designs should be introduced without the previous approval of the Railway Board.

If any defect in standard designs is noticed under service conditions or if certain modifications to the design are considered desirable, the matter should be brought to the notice of the Director-General, Re-search, Designs and Standard Organisation Signal and Telecommunications for examination in consolation with the Signalling Standard Committee.