Page 318 - IRSEM_Main Book

Para No. 12.3.1, 19.3.1 (b) Annexure: 12-A1

Essential Requirements before Interlocking of a Point

Before the interlocking work at points is undertaken, it must be ensured that the JE/SSE( P-Way) has:

(a) brought the track to correct level and alignment.
(b) eased off rail joints on either side of points to be interlocked and closed the stock rail joints

associated with lock bars.
(c) fully ballasted and packed all points which are to be interlocked and taken adequate measures

to prevent lateral and longitudinal movement of points.
(d) provided creep and level pillars.
(e) arranged the sleepers on adjacent tracks in alignment, where rods and wires have to cross.

(f) seen that the gauge is correct.
(g) provided and fixed special timbers as required.

(h) provided means to prevent creep in the vicinity of points.
(i) fitted gauge tie plates correctly.
(j) made the stretchers of such a length so that the throw of switches is as per approved

drawings.
(k) adjusted loose heel switches so that:

(i) they can be thrown both ways with ease and can be housed against the stock rail by hand
and remain there when the pressure is removed.
(ii) the planed surface of the switch rail fully houses against the stock rail as per approved

drawings.
(l) adjusted fixed heel switches so that :
(i) they normally lie in the mid-position and flex equally in the normal and reverse positions.

(ii) the planed surface of the switch rails fully houses against the stock rails as per approved
drawings.
(m) fitted flexible stretchers so that they flex equally in the normal and reverse positions,

(n) provided a stop for the open position of a single switch layout.

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