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

Scaffolding and ladders.
The Contractor shall ensure that suitable scaffolds are being provided for workers
for all the works, which cannot safely be done from the ground or from solid
construction, except such short period work, as can be done safely from ladders.
When a ladder is used an extra mazdoor shall be engaged for holding the ladder and
if the ladder is used for carrying materials as well, suitable footholds and handholds
shall be provided on the ladder and the ladder shall be given an inclination not
steeper than ¼ to 1 (¼ horizontal to 1 vertical). IS code for scaffolding and ladders,
IS:3696 Part-I and Part-II and its latest revision is to be followed. Every ladder
shall be securely fixed. No portable single ladder shall be over 7m in length. Width
between side rails in rung ladders shall in no case be less than 30cm. for ladders;
this width shall be increased by atleast 6mm for each additional 30cm length.
Uniform steps spacing shall not exceed 30cm.
Scaffolding or staging more than 3.25 metres above the ground or floor swung or
suspended from an overhead support or erection with stationary support shall have
guard rail properly attached bolted, braced or otherwise secured atleast at 1 metre
high above the floor or platform and the scaffolding of staging and extending along
the entire length of the outside and ends thereof with only such openings as may be
necessary for the delivery of materials. Such scaffolding or staging shall be so
fastened as to prevent it from swaying from the building or the structure.
All scaffolds, ladders and other safety devices mentioned or described herein shall
be maintained in a safe condition and no scaffold, ladder of equipment shall be
altered or removed while it is in use.
Working platforms.
Working platform, gangways and stairways shall be so constructed that they do not
sag unduly or unequally and if height of a platform or gangways or stairway is more
than 3.25 meters above ground level, it shall be closely boarded having adequate
width and be suitably fenced. Every opening in the floor of a building or in a
working platform shall be provided with suitable means to prevent fall of persons or
materials by providing suitable fencing or railing with a minimum height of
1 meter. Safe means of access shall be provided to all working platforms and other
working places.
Precautions when using electrical equipment’s.
Adequate precautions shall be taken to prevent danger from electrical equipment.
When workers are employed on electrical installations, which are already energised,
insulating mats, wearing apparel such as gloves, sleeves and boots, as may be
necessary shall be provided. Workers shall not wear any rings, watches and carry
keys or other materials, which are good conductors of electricity.
GTS : General Technical Specification. Page 20