PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

5.16 Caution cum information boards.
Before commencing an excavation, "Caution-Cum-Information" board shall be
installed at site by the Contractor. Such board shall remain at site as long as the
trench remains open. The board shall be installed at both the ends of the trench
atleast 100m before the approach to the area, if the trench is less than 600m in
length. Additional boards at every 300m shall be installed, if the length of the trench
exceeds 600m. If the streetlight is inadequate, lettering with fluorescent paint shall
be used for these boards. The boards shall also contain information regarding dates
of commencement and completion of the work, name and phone number of the
Engineer in charge of the work. See also Clause 5.19. The size of lettering shall be
adequate to be read by passing vehicles.
5.17 Barricading.
To prevent persons from injury and to avoid damage to the property, adequate
barricades, construction sign, torches, red lanterns and guards as required shall be
provided and maintained during the progress of the construction work and until it is
safe for traffic to use the roadways. The manhole trench shall be barricaded on all
four sides. Barricading for laying pipe lines consists of fixing casuarina posts
8-10cm dia. and 1.52m high at 1.53m centre to centre tied with coir ropes in two
rows or by any other method as approved by the Engineer. Barrication also
includes watching during night, fixing danger flags, danger lights/reflector and
painting in different colours. The Contractor who has dug up the trench shall be
responsible for any mishap, which may occur.
5.18 Fencing, watching, lighting.
The parts of the fencing shall be of timber, securely fixed in the ground not more
than 2.50m apart, they shall not be less than 10cm in dia. or not less than 1.25m
above the surface of the ground. There shall be no two rails, one near the top of the
posts and the other about 0.50m above the ground and each shall be of 5cm to 10cm
in diameter and sufficiently long to run from post to post to which they shall be tied
with strong ropes. The method of projecting rails beyond the posts and tying
together where they meet will not be allowed on any account. All along the edges
of the excavated trenches, a bund of earth about 1m high shall be formed when so
required by the Engineer for further protection. Proper provision shall be made for
lighting at night and watchmen shall be kept to see that this is properly done and
GTS : General Technical Specification. Page 39