WB/DKM/Admin/e-NIT-21/2026-27

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and for all lift, as directed by Engineer-in-charge. All kinds of soil

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 50 and for all lift.

Single Brick Flat Soling of picked jhama bricks including ramming and dressing bed to proper level and filling joints with local sand.

1:2:4 (1 Cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded stone aggregate 40 mm nominal size derived from natural sources)

1:1½:3 (1 Cement: 1½ coarse sand (zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources)

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. Thermo-Mechanically Treated bars of grade Fe-500D or more.

By Mix in Place Method Construction of granular sub-base by providing graded materials such as natural sand/crushed gravel/crushed stone/combination depending upon the required grading , spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator and compacting with vibratory roller to achieve at least 98% of the maximum dry density for the material determined as per IS:2720 (Part 8), complete as per clause 401 desired density, complete as per clause 401

Wet Mix Macadam ------Providing, laying, spreading and compacting graded stone aggregate conforming to the grading of table 400- 13 revised vide table 2 of IRC : 109 (2015) to wet mix macadamspecification including premixing the Material with water at OMC in mechanical mix plant carriage ofmixed Material by tipper to site, laying in uniform layers with paver in sub- base / base course on wellprepared surface and compacting with vibratory roller to achieve the desired density .The thickness of a single compacted layer shall not be less than 75 mm.(Reference to MoRT&H's specification 406. Note 1. As three wheeled smooth steel rollers are commonly in use, the same has been provided as an alternative which can be used if the thickness of individual layer does not exceed 100 mm .

Concrete Block Pavement ------------------- Supplying and Laying in the particular pattern of cement concrete block pavements with BIS certification and spacer nib of size and shape with aspect ratio as per IS 15658 with cement concrete grade not less than M40 on the prepared base course of specified CBR as mentioned in design and drawing with a cushion of bedding sand of 30 to 50 mm thick (grading of the bedding sand as per clause 6.5.1 of IRC SP-63) and filling up the gaps between two paver block with joint filling sand (the grading of the joint filling sand will be as per clause 6.5.2) complete as per IRC SP - 63 with proper confinement of bedding and joint filling sand, compaction,levelling and filling up of the edge gaps with mortar. Type I, II,III, IV should be as per design requeirment or instruction of E-I-C. Note : The IRC SP 63 will prevail out of the two codesa) c) Type - II (100 mm thickness) inter locking system

Centering and shuttering including strutting, propping etc. and removal of form work for :Foundations, footings, bases for columns