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| 1 | Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means in foundation trenches or drains (not exceeding 1.5m in width or 10sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50m. (All kinds of soil) |
| 2 | Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means in foundation trenches or drains (not exceeding 1.5m in width or 10sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50m. (Ordinary rock) |
| 3 | Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means in foundation trenches or drains (not exceeding 1.5m in width or 10sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50m. (Hard rock- blasting prohibited) |
| 4 | Cutting 32mm MS rod in required length etc complete as perthe direction of the departmental officers. |
| 5 | Bending 32mm MS rod for crossing cable trench/ foundations/ risers etc. |
| 6 | Laying of earth mat of required size as specified using 40/32/25mm MS rodincluding levelling lowering and placing in trenches,complete as per the direction of departmental officers. |
| 7 | Drilling holes and driving down MS ground electrode from the bottom level of trench in all classes of soil including rock etc. complete as per the directions of department officers |
| 8 | Drilling bore holes of sizes 100mm or nearest in all classes of soil including hire charges of plant anfd machinery, cost of oil, fuel, tool etc. taking all necessary precautions for safety to the substation equipments etc. as per the direction of departmental officers at site. |
| 9 | Driving down the ground electrode upto a depth of 3m from the already taken earth pitas directed by the departmental officers. |
| 10 | Providing, laying and filling bore holes with conductive concrete using marconite and cement in the ratio 2:1 ( 2 Marconite :1 Cementin weight with 1Ltr of water per 4 kG of total mix)) ramming suitably to remove air pockets thoroughly as directed by departmental staff at site. |
| 11 | Welding of overlapping joints for mat,riser lap joints with 32/25mm MS rod placed in trenches, having 150mm in length 6mm in thick on both sides of the rod and both ends of overlapped MS rods with 6mm welding thickness after cleaning the surfaces neatly. Charges includes cost of low hydrogen DC electrode (No. E7018), hire charges of DC arc welding set and tools and plants required, current charges including labour charges for holding MS rod in position and applying two coats of anti corrosive paints at the welded joints etc. complete as per the directions of department officers. |
| 12 | Welding the nodal points (cross joints ) in the trenches at two sides to a thickness of 6mmafter cleaning the surface neatly. Charges includes cost of low hydrogen DC electrodes (No. E7018), hire charges of DC welding set and tools and plants required, current charges, labour charges for holding MS rod in position and applying two coats of anti corrosive paints at the welded joints etc. complete as per the directions of departmental officers. |
| 13 | Welding the ground electrodewith the main electrode ,after cleaning the surface neatly. Charges includes cost of low hydrogen content DC electrodes (No. E7018), hire charges of DC arc welding set, tools and plants, current charges, labour charges for holding MS rod in position and applying two coats of anti corrosive paints at the welded joints etc. complete as per the directions of departmental officers. |
| 14 | Filling available excavated earth (excluding rock) in trenches, plinth,sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50m and lift upto 1.5m. |
