Page 284 - IRSEM_Main Book

(k) Locking strips shall be in accordance with approved plans.

(l) Locking box covers shall be securely fixed so that it is not possible to
force the locking by displacing the locks or bars. The covers shall be
padlocked and sealed.

(m) After assembling locking, it shall be carefully checked and compared with
the approved Locking Diagram.

12.1.4 Checking of Components: The SSE/JE (Signal) shall carefully check the
components of a new interlocking frame on receipt against plans and take
necessary action.

12.1.5 Erection: Interlocking frames shall be erected in accordance with approved
plans and locking fitted in accordance with the approved Locking Diagram.
The locking shall then be carefully checked and compared with the approved
Locking Diagram and tested by pulling of individual levers against the
approved Interlocking Table as per instructions laid down in para 12.26.7.

12.1.6 Subsequent Additions and Alterations

(a) Any additions and alterations to interlocking frames shall be carried out only in
accordance with the approved revised plans and interlocking tables.

(b) The SSE/JE (Signal) shall requisition all requirements of materials in
accordance with the additions and alterations shown on the approved
revised plan and locking diagram and when requisitioning new plungers
shall quote correct drawing number and if that is not available, state the
type of frame and length of plunger required. When requisitioning new
mechanical interlocking locks (dogs), the locks (dogs) required must be
specified by quoting the type number shown against each lock on the
standard drawings.

(c) After carrying out additions and alterations, locking shall be checked
completely as detailed in para 12.26.7.

12.1.7 Information to the Divisional Signal & Telecommunication Engineer:
The SSE/JE (Signal) shall inform the DSTE/ADSTE incharge of the section
when a new interlocking frame or an alteration to the existing interlocking
frame is ready for his test and introduction.

Section 2: Point Rodding and Fittings

12.2.1 Point Rodding: Point rodding shall be solid and shall be in accordance with
I.R.S Specification No. S 5.

12.2.2 Alignment: Point rodding shall be straight before being laid. Runs of rodding
shall normally be in a straight alignment.

12.2.3 Distance from the Centre of Track: The distance from the nearest rod to
the centre of the nearest track shall not be less than 1905 mm on BG lines
and 1370 mm on MG/NG lines except when platform walls or other structures
render this impossible.

Chapter 12: Installation, Testing & Maintenance of Mechanical Signalling Equipment Page 238 of 535