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

8.1 Material.
Chapter 8
Form Work
All formwork for concrete work shall be mostly of MS Plates. The plates shall be
free from wrinkles, lumps or other imperfections. Steel plates shall have sufficient
thickness to withstand the construction loads and the pressure exerted by the wet
concrete as well as vibration during placing of concrete. Normally the thickness
shall not be less than 18 gauge for MS Plates.
The formwork may also be constructed of timber, or other approved material. It
shall be firmly supported, adequately strutted, braced and tied to withstand the
placing and vibrating of concrete and the effects of weather. One copy of the
contractors shoring and formwork drawings shall be submitted to the Empolyer for
record purpose only and not for review or approval. Forms, shoring and false work
shall be adequate for imposed live and dead loads including equipment and men,
height of concrete drop, concrete and foundation pressures and stresses, wind
pressures, lateral stability, and other safety factors during construction. The
contractor shall be responsible for the calculations and designs for the formwork.
The contractor shall be held solely responsible for any failure and for the safety of
work and workmen. He shall pay necessary compensation, if need be, for damages
to work, property and injuries to persons. The scaffolding, hoisting arrangements
and ladders shall have easy approach to work spot and afford easy inspection.
All formwork shall be fabricated in compliance with the best modern practice, so
that the finished surface is even, unblemished free of fins and true to line, level and
shape as shown in the drawings. The forms shall comply with the requirements of
IS: 456.
8.2 Arrangements.
All formwork shall conform to the shape, lines, dimensions as shown on the plans
of the concrete members. the formwork shall include all wedging, bracing, the rod,
clamps, stop off boards and other devices necessary to mould the concrete to the
desired shape. The formwork shall be constructed as to remain sufficiently rigid
during the placing and compacting of the concrete and shall withstand the necessary
pressure, ramming and vibrations without any deflection from the prescribed lines
GTS : General Technical Specification. Page 67