27/HDA/EC OF 2026 2027

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, for all lift, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m Ref:-DSR-2023, Page No-87, Code No.-2.8

Structural steel work in single section, fixed with or without connecting plate, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete. Ref:-DSR-2023, Page No-170, Code No.-10.1

Steel work in built up tubular (round, square or rectangular hollow tubes etc.) trusses etc., including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete. Hot finished welded type tubes Ref:-DSR-2023, Page No-170, Code No.-10.1

Providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by Engineer-in-Charge) of total coated thickness 0.50 mm (base metal of minimum 0.45 mm thickness with total coating thickness of 0.05mm) with zinc coating 120 grams per sqm as per IS: 277, in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns. Sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length upto 12 metre or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling /self tapping screws of size (5.5x 55 mm) with EPDM seal, complete upto any pitch in horizontal/ vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required. Ref:-DSR-2023, Page No-192, Code No.-12.50

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade : Two or more coats on new work Ref:-DSR-2023, Page No-204, Code No.-13.61

Reinforcedcementconcretein open foundation complete all including vibrating and compacting, finishing, curing, sampling, testing etc. as per drawing and Technical Specifications (Reference to MORT&H'sspecifications1500,1700& 2200). RCC Grade M25 Using concrete Mixer Ref: Page-184, Sl no.8(E)I- PWD-NH sch 2019-2020.

By Mix in Place Method Constructionofgranularsub-baseby providing graded material such as natural Laterite Boulder/Moorum/crushed gravel/crushed stone/combination depending upon the required grading spreading in uniform layers with motor grader on prepared surface, mixing by appropriate mechanica lmixure (with controlled addition of water), and compacting with vibratory roller to achieveat least 98%of themaximum dry density for the material determined as per IS:2720 (Part 8), complete as per clause 401 Ref: Page-99, Sl no.1B(i) PWB-PWD-NH sch 2019-2020.

Wet Mix Macadam Providing, laying, spreading and compacting graded stone aggregate conforming to the grading of table 400 13 revised vide table2 of IRC : 109 (2015) to wet mix macadam specification including premixing the Material with water at OMC in mechanical mix plant carriage of mixed Material by tipper to site, laying inuniformlayerswithpaver in sub-base / base course on well prepared surface and compacting with vibratory roller to achieve the desired density .The thickness of a single compactedlayershallnotbelessthan 75 mm.(Reference to MoRT&H's specification 406. Ref: Page-106, Sl no.12 -PWD-NH sch 2019-2020.

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. b) Type - II (100 mm thickness) inter locking system Ref: Page-50, Sl no. B-3 -PWD-NH SOR 2019-2020.(2nd Addenda)