Specification Part 3 - Road & Bridge Works - Urban Administration ...

202.6. Measurements for Payment
The work of dismantling structures shall be paid for in units indicated below by taking measurements
before and after, as applicable:
(i) Dismantling brick/stone masonry/concrete (plain and reinforced) cu. m.
(ii) Dismantling flexible and cement concrete pavement cu. m.
(iii) Dismantling steel structures tonne
(iv) Dismantling limber structures cu. m.
(v) Dismantling pipes, guard rails, kerbs, gutters and fencing linear m.
(vi) Utility services Nos.
202.7. Rates
(i) The Contract unit rates for the various items of dismantling shall be paid in full for carrying out the
required operations including full compensation for all labour, materials, tools, equipment, safeguards
and incidents necessary to complete the work.
(ii) These will also include excavation and backfilling where necessary to the required compaction and
for handling, salvaging, piling and disposing of the dismantled materials within all lifts and up to a lead
of 1000 m.
Summary of Site Clearance
1. The road land should be cleared of all materials unsuitable for the work by cutting, trimming,
removing and disposing of all materials, such as trees, bushes, shrubs, stumps, roots, grass, weeds,
top organic soil not exceeding 150 mm in thickness and rubbish, etc. This should be carried out well in
advance of earthwork operations.
2. The top soil removed during clearing and grubbing of site, if suitable for re-use shall be transported,
conserved and stacked for re-use.
3. All trees, stumps, etc. falling within the excavation and embankment lines should be cut to such
depth below ground level that in no case these fall within 500 mm of the sub-grade. Beyond these
limits, they need to be cut down to 500 mm below ground level.
4. Excavations below the ground level arising out of removal of trees, stumps, etc., should be filled in
layers with suitable material and compacted to the specified density given by the Engineer.
5. Measurement of trees having girth more than 300 mm should be done as per sizes given in the Bill of
Quantities (BOQ).
6. Ant-hills both above and below the ground shall be removed by excavating to a suitable depth as
directed by the Engineer. Cavities in the ground after removal of ant-hills shall be filled with appropriate
material and properly compacted to the specified density.
7. Existing structures which are within the road land and designated for removal should be dismantled
carefully and the resulting materials so removed as not to cause any damage to the serviceable
materials to be salvaged, the parts of the structure to be retained and any other adjoining properties
and utilities.
8. Holes and depressions caused by dismantling operations or caused by rats etc. shall be backfilled
with approved material and compacted to the required density.
9. Obtain prior permission of the competent authority for removing/disturbing any existing utilities etc.
required.
10. Conserve top-soil for re-use where suitable.
11. Do not disturb existing poles, fences, signs, monuments, buildings, pipelines, sewers, and trees etc.
which do not interfere with the work and are to be retained.
12. Do not damage parts of existing structures to be retained while dismantling portions interfering with
the work.