b-1 tender form - Maharashtra Industrial Development Corporation

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Scaffolding will be double or single as is warranted by the work. Scaffolding shall be erected with steel
sections or pipes, bullies or bamboos of adequate strength so as to be safe for all construction
operations. The contractor shall take all measures to ensure the safety of the work and working
people. Any instruction of the Engineer-incharge in this respect shall also be complied with. The
contractor shall be entirely responsible for any damage to property or injury to persons resulting from
ill erected scaffolding, defective ladders and materials or otherwise arising out of his default in his
respect. Proper scaffolding shall be provided to allow easy approach to every part of the work.
Overhead work shall not be allowed.
2.6 Application of Plaster : Before commencing the plastering the surface to the plastered shall be
made wet sprinkling water.
The patches of mortar, with thickness equivalent to thickness shall be provided on the area to be
plastered. It shall be ensured that the surface all such patches is in true level/batter/plumb as the case
may be; to achieve this the thickness of patches may vary marginally, but average thickness shall not
be less than that specified.
1. Ceiling plaster shall be completed before commencement of wall plaster.
2. Plastering shall be started from the top and worked down towards the floor. All putlog holes shall be
properly filled in advance of the plastering as the scaffolding is being taken down. To ensure even
thickness and a true surface, plaster about 15x15 cm shall be first applied, horizontally and vertically,
at not more than 2 m intervals over the entire surface to serve as gauge. The surfaces of these
gauged areas shall be truly in the plane of the finished plaster surface. The mortar shall then be laid
on the wall, between the gauges with trowel. The mortar shall be applied in a uniform surface slightly
more than the specified thickness and then brought to a true surface by working a wooden straight
edge reaching across the gauges, with small upward and side ways movements at a time. Finally the
surface shall be finished off true with trowel or wooden float according as a smooth or a sandy
granular texture is required. Excessive trawling or over working the float shall be avoided. During this
process a solution of lime putty shall be applied on the surface to make the later workable.
3. All corners, arises, angles and junctions shall be truly vertical or horizontal as the case may be and
shall be carefully finished. Rounding or chamfering corners, arises, provision of grooves at junction
etc. where required shall be done without any extra payment. Such rounding, chamfering or grooving
shall be carried out using proper templates or battens to the sizes required.
4. When suspending work at the end of the day, the plaster shall be left, cut clean to line both
horizontally and vertically. When recommencing the plastering, the edge of the old work shall be
scrapped cleaned and wetted with lime putty before plaster is applied to the adjacent areas, to enable
the two to properly joint together. Plastering work shall be closed at the end of the day on the body of
wall and not nearer than 15 cm to any corners or arises. It shall not be closed on the body of the
features such as plasters, bands and cornices, nor at the corners of arises. Horizontal joints in plaster
work shall not also occur on parapet tops and coping as these invariably lead to leakage. No portion
of the surface should be left out initially to be patched up later on.
5. The surface of the under coat on which the punning is to be done shall be left rough. The punning
shall be applied, when the under coat is still green. The mortar for punning shall be applied in a
uniform layer slightly more than 3 mm thick between gauged pads, with which to ensure an even and
uniformly thick surface by frequent checking with a wooden straight edge. It shall be finished to an
even and smooth surface with trowels.
2.7 Finish : The plaster shall be finished to a true level and plumb surface and to the proper degree of
smoothness as required. The work shall be tested frequently as the work proceeds with a true straight
edge not less than 2.5 m long and with plumb bobs. All horizontal lines and surfaces shall be tested
with a level and all jambs and corners with a plumb bob as the work proceeds.
2.8 Thickness : The thickness of the plaster specified shall be measured exclusive of the thickness of
key i.e. grooves or open joints in brick work. The average thickness of plaster shall not be less than
the specified thickness or 12mm. The minimum thickness over any portion of the surface shall not be
less than specified thickness by more than 3 mm. The average thickness should be regulated at the
time of plastering by keeping suitable thickness of the gauges. Extra thickness required in doubling
Contractor.
Executive Engineer(E&M).