SPECIAL REPAIR TO EXISTING WATER TANKS (SWTS) AT NDA KHADAKWASLA

Excavation of trenches in hard/dense soil for laying GI water supply pipelines, not exceeding 1.5 m in width and up to 1.5 m depth, including dressing and ramming of sides and bottom, getting out excavated material, shoring/strutting where required, dewatering if necessary, and disposing of surplus excavated earth within a lead of 50 m and lift up to 1.5 m, complete, all as specified and directed. (1) The rate shall include excavation in hard/dense soil, breaking clods, dressing of trench bed, and all incidental operations necessary for laying the pipeline. (2) Refilling, watering, ramming, and consolidation around the pipeline shall be measured and paid separately under the relevant BOQ item. (3) Any damage caused to existing underground utilities such as water mains, electrical cables, communication cables, drains, etc., during excavation shall be made good by the contractor at his own cost. (4) Excavated material suitable for backfilling shall be stacked separately as directed . (5) Disposal of unsuitable or surplus excavated material beyond the specified lead shall be measured and paid separately, if applicable.

ditto all as per ser item No 1 above but Soft/loose soil

M&L for Plain Cement Concrete Type D2 1:4:8 (using 40 mm graded stone aggregate) in foundations, filling and mass concrete complete all as specified and directed.

M&L cement concrete 1:2:4 type B1, (using 20 mm graded crushed stone aggregate) as in lintels upto 1.5 m clear span, cills, steps; seismic and other similar bands, plinth courses, string courses, lacing courses, parapets and railings upto 60 cm in height, copings, benching, kneelers, apex stones, bed plates, kerbs, water troughs and the like including weathering, slightly rounded or chamfered angles and throating and including necessary formwork complete all as specified and directed.

M&L precast cement concrete 1:3:6 type C-1 ( using 20mm graded aggregate ) block masonry with solid blocks exc10 cm thick in width and setting in cement mortar 1:6 complete in wall complete all as specified and directed

M & L for Galvanised steel wire netting mesh size 50mm x 50mm and dia of wire 4.00mm (conforming to IS 4826). The mesh shall be fixed to steel frame with suitable clamps, nuts, bolts and welding etc all as specified and directed. (Note: sample/ make of mesh shall be got approved from GE by contractor prior placing bulk order).

M&L for mild steel work as in bands, straps, supports or stays for rainwater, ventilating pipes, including bolts, if required: hooks (stay), heavy, for large gates; hook and pintle hinges: large hasps and staples; chains; handmade sliding bolts; clamps; hold fasts; wall ties; hooks for hanging fans; plain angle cleats for securing purlins to wood trusses or rafters; knee piece inserts; two way and three way straps, plate washers and similar small articles conforming to Fe-290 Gde-E-165 complete all as specified and directed.

S&F MS rungs fixed to sump of size 200mm x 300 mm with steel reinforcement 25mm dia in required shape and fixed to brick walls in as steps in sump of wall complete all as specified and directed.

M&L for cement concrete (1:3:6) type C2 using 20mm graded stone aggregate in plinth protection, 100 mm thick, finished even and smooth without using extra cement, including making joints 12 mm wide to the full depth of PCC at every 3 metres and at every change of direction and filling the same with & including bitumen85/25 and sand in the proportion of (1:3) by weight complete all as specified and as directed.

M&L for rendering 15 mm thick on fair faces of brick work or concrete surfaces in cement mortar 1:6 finished the surface even and smooth without using extra cement complete all as specified and directed.