Tender Document - irpmu.railnet.gov.in

e so constructed that there are adequate facilities for climbing on the top of the
same with proper working space for conducting theodolite work. Necessary
base/reference lines and pillars as & where required for setting out of the bridge
and execution work are also to be constructed and maintained by contractor
without any extra cost as per directions of the Engineer-in-charge.
17.0 BARRICADING:
17.1 The contractor before starting the construction work along the running line shall
have to barricade the entire length of running line along which the work has to be
carried out. Barricading will also be done at all location where contractor’s vehicle
will ply along the track. Barricading has to be done as per approved plan and to
the entire satisfaction of the Engineer-in-charge.. Contractor has to take
precaution that the barricading should not fall towards the railway running line.
Payment for barricading will be made under relevant NS-item.
18.0 FORM WORK:
18.1 Form work shall be of steel plates of minimum 3.0mm thick fixed on the angle
iron frame or waterproof ply wood shuttering of adequate thickness unless
otherwise directed by the Engineer-in- charge. It should be watertight, sufficiently
strong and rigid to resist forces caused by vibration and incidental loads
associated with it and keep the form rigid.
18.2 If the work is to be executed in close proximity of running track, the shuttering
should be so planned so as not to infringe with schedule of minimum moving
dimension, B.G of 1963 (1973 reprint). Shuttering should be of self-supporting
nature as no centring or propping will be permitted on the running track side.
18.3 Work shall be executed without disturbing the existing position of running track as
shown in plan and entire work should be planned accordingly.
18.4 If at any stage of work during/ after placing the concrete in the structure, the work
is found defective, such concrete shall be removed and work shall be redone
with fresh concrete at the cost of contractor. The props for the centring wherever
permitted shall be supported by the double wedges in order to facilitate causing
& removal of the shuttering without jarring. Centring and shuttering should be
carefully released in order to prevent the loading being instantly transferred to
concrete. The period that shall lapse after the last pour of concrete for easing
removal of centring and shuttering shall be fixed by the Engineer-in-charge and
will be binding on the contractor/s.
18.5 It may be necessary to make provision for holes/ grooves in the form work to
house the various services, for which neither any extra payment shall be made to
the contractor/s for making these provisions nor any deduction shall be made on
a/c of any saving in RCC work due to these provision.
OS/Works 53