BID Document for Guest House with Boundary Wall.pdf - Integrated ...

finished off neatly and leveled smoothly at an angle of 45 0 with the outside of the pipe. The cement mortar
joint shall be cured at least for seven days before testing.
Each length of pipe sewer shall be completed from manhole unless otherwise ordered, perfectly straight and true in
level and gradient and the trench shall not be filled in until the length has been inspected, tested and passed by
the Engineer-in-Charge or his representative. If it is found before the expiration of the period of maintenance
that any length of sewer between certain manholes has become out of alignment or grade, leaky or damaged, the
contractor shall at their own expense readjust the work as per instruction of the Engineer-in-Charge.
9.5 Hydraulic testing of stone ware pipe sewer lines:
Hydraulic testing of stone ware pipe sewer lines is to be done is accordance with IS: 4127-1967. All new
sanitary sewers upto 460 mm dia except in case where sewerage facilities have been extended, shall be subject
to a test pressure of at least 2.5 m head of water at the highest point of the section under test. The tolerance of
two liter per centimeter of diameter per kilometer may be allowed during a period of ten minuets. The method
of testing should be adopted as per direction of the Engineer-in-Charge. Any leakage that will be visible and
the defective part of the work should be cut out and made good. A slight amount of sweating which is uniform
may be allowed but excessive sweating from a particular pipe or joints shall be watched for and taken as
indicating a defect to be made good. Any joints found leaking or sweating shall be rectified as per direction of
the Engineer-in-Charge. Filling of the trench shall not be commenced until the length of the pipes has been
tasted and passed.
9.6 Manhole
All manholes shall be of the size and type as given below and / or as per drawing. All manhole shall be circular /
rectangular in shape. The bed shall be of cement concrete of mark M-10 of 100 mm thickness or as shown in the
drawing. Top level of manhole shall be generally 100 mm above the surrounding ground levels or as directed by the
Engineer-in-Charge
Water sealed Manhole covers shall conform to IS:1726 & BS12592 RCPC or PFRC.
a) 20MT cover:- 685X100-110 mm, frame:- 900ϕ X 180mm, weight:- 240kg.(approx) for street Manhole
b) 5MT cover:- 425X55 mm, frame:- 540X540X100mm, weight:- 60kg.(approx) for plot level manhole and
for Box Drain.
c) 5MT cover:- 550X65 mm, frame:- 650X650X135mm, weight:- 90kg.(approx) for other manhole.
In cases where branch pipe sewers enter the manhole of main pipe sewer at the level more than 1 m from the
main sewer a drop connection shall be provided. All exposed surfaces shall be painted with 2 coats of
bituminous painting.
The construction of street manhole shall be carried out in two stages:
In the 1 st stage of construction the top level of manhole shall be kept at a depth 800mm below from the
finished level, and no manhole cover shall be fixed. The manhole opening shall be covered by a pre-cast RCC
slab of specified thickness as approved by EIC.
In the 2 nd stage of construction, the manhole shall be completed upto finished top level including fitting, fixing of
manhole cover after completion of construction of road or as directed by EIC. The offered rate shall include both the
stages of construction including cutting of road pavement & Lifting of pre-cast slab carefully but excluding the cost
of pre-cast slab.
B. SPECIFICATION FOR SUPPLY & LAYING OF DUCTILE
IRON PIPE LINES.
1.0 Specification for the Work
The work comprises of mainly three components i.e.
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