Providing and laying water proofing treatment to the roof of Technical Block given on rent to Income Tax Department at RTTC Building, Vanivihar, Bhubaneswar.

Amount

Sub-Head : Concrete Work

Extra for providing and mixing water proofing material in cement concrete work in doses by weight of cement as per manufacturer’s specification.

Sub-Head : Roofing

Providing gola 75x75 mm in cement concrete 1:2:4 (1 cement :2 coarse sand : 4 stone aggregate 10 mm and down gauge) including finishing with cement mortar 1:3 (1 cement : 3 fine sand) as per standard design

In 75x75 mm deep chase

Sub-Head : Repairs to Buildings

Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq. meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground , all complete as per directions of Engineer-In-Charge.

With cement mortar 1:4 (1cement: 4 coarse sand).

Providing and laying APP (Atactic Polypropylene Polymer) modified prefabricated five layer 3mm thick water proofing membrane, black finished reinforced with non-woven polyester matt consisting of a coat of bitumen primer for bitumen membrane @ 0.40 ltr/sqm. by the same membrane manufacture of density at 25°C, 0.87-0.89 kg/ltr and viscosity 70-160 cps. Over the primer coat the layer of membrane shall be laid using Butane Torch and sealing all joints etc., and preparing the surface complete.

The vital physical and chemical parameters of the membrane shall be as under : Joint strength in longitudinal and transverse direction at 23°C as 650/450N/5cm. Tear strength in longitudinal and transverse direction as 300/250N. Softening point of membrane not less than 150°C. Cold flexibility shall be upto -2°C when tested in accordance with ASTM, D - 5147. The laying of membrane shall be got done through the authorised applicator of the manufacturer of membrane :

3 mm thick

Sub-Head : Dismantling and Demolishing

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge.

Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Demolishing brick work manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge.

In cement mortar

Sub-Head : Water Proofing

Grading roof for water proofing treatment with

Cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20mm nominal size)

Cement mortar 1:3 (1 cement : 3 coarse sand)

Sub-Head : LMR Item

Supplying of Labour for Cleaning of grass and debrises with removal of unserviceable anteena,wire and part of BTS equipment to ground all complete as directed by Engineer-in-charge.

Chipping of roof surface for removing loose lime concrete, mortar, other dposited material and applying a coat of cement slurry @2.20 Kg/Sqmt on roof surface as per direction of Engineer-in-Charge.

PRAKASH CHANDRA SAHU