PROVISION OF MILD STEEL STRUCTURE FOR STRENGTHENING OF EXISTING RETAINING WALLS AT WET CANTEEN AND SILOXANE-BASED WATER REPELLENT TREATMENT TO EXTERNAL WALL CLADDING OF ADMINISTRATIVE BUILDING AT ITM MUSSOORIE UNDER GE(I) RND DEHRADUN

M&L for Excavating in post holes in hard dense soil (or similar holes) each n exc 0.5 cu. m, getting out, returning, filling in and ramming earth or broken rubble Mixed with earth around, in layers not exceeding 25 cm, complete all as specified and directed.

M&L for Cement concrete in foundations, filling and mass concrete Type B-2 40mm graded aggregate complete all as specified and directed.

S&F for Framed work such as grills, gratings, etc. with ends of bars shouldered and/or riveted, or forged into spikes; framed guard bars; barred iron doors; ladders; framed balusters; walk ways; railings; framework of water tanks and similar work conforming to Fe.290.Gde-E-165 complete all as specified and directed.

M&L for walling of random rubble, uncoursed, well bonded, bedded and solidly hearted, built in cement mortar 1:6 complete built in cement mortar or cement lime mortar including all quoins, arches, pillars, etc, but excluding ashlar facings, dressed stonework and precast concrete articles etc complete all as specified and directed.

M&L for preparing of new steel surfaces over 10cm width or girth and applying two coat of synthetic enamel paint on steel surfaces over a coat of red oxide primer complete all as specified and directed.

M&L for raised pointing to Random Rubble or Polygonal rubble brought upto course masonary in CM 1:4 complete as specified and directed.

M&L for PCC 1:2:4, type B-1 (using 20mm graded stone aggregate) as in lintels upto 1.5m clear span, cills, steps; seismic and other similar bands, plinth courses, string courses, lacing courses, parapets and railings upto 60 cm in height, copings, kneelers etc. incluing necessary form work complete all as specified and directed.

M&L for applying siloxane based water repellent impregnation on concrete/brick/stone/masonry surfaces (Make: Sikagard-700 S or equivalent), complete all as specified and directed, including the following:- (a) Preparation of surfaces by cleaning and removing dust, dirt, oil, grease, efflorescence, mould etc, using brush/roller/spray with detergent, degreaser, light blast cleaning, steam cleaning as required, including removal of any existing incompatible coating/paint which may block absorption. (b) Filling/repairing cracks wider than 200 microns using approved crack filler as per manufacturer’s instructions. (c) Ensuring surface is dry (maximum moisture content 5–6%) with no visible damp patches before application. Applying the first coat by low-pressure spray, roller or brush in vertical direction. (d) Applying second coat before the first coat is fully dried, strictly as per manufacturer’s instructions. Coverage rate: 0.30 to 0.50 Kg/Sqm per coat (corresponding to 0.375 to 0.625 L/Sqm per coat). Notes: (i) The work shall be carried out strictly under manufacturer’s directions and/or by an authorised applicator. (ii) Contractor shall produce manufacturer’s certificate after satisfactory completion of work.

M&L for Washed stone grit plaster on exterior walls in two layers, under layer 12mm cement plaster 1:4 (1 cement: 4 coarse sand ) furrowing the under layer with scratching tool, applying cement slurry on the under layer @ 3 Kg of cement per square metre, top layer 15mm cement plaster 1:1/2:2 (1 cement: 1/2 coarse sand : 2 stone chipping 10mm nominal size) in panels with groove all around as per approved pattern including scrubbing and washing, the top layer with brushes and water to expose the stone chippings .complete all as specified (Payment for providing grooves shall be made separately). complete as specified and directed.

M&L for Forming groove of uniform size 15mm wide and 15mm deep in the top layer of washed stone grit plaster as per approved pattern using wooden battens, nailed to the under layer including removal of wooden battens, repair to the edges of panels and finishing the groove complete as per specifications and direction of the Engineer-in-charge complete as specified and directed.