Construction of RCC box culvert(3.00 x 3.00)mtr single cell Structure at Local cherra (Sonaichhari)(Near Md Ful Miah Land)at Sonamura Belonia road to Ghoshpara via Barnarayan road under Kathalia RD Block during the year 2025 26

Excavation for Structures (A) Without dewatering. Earthwork in excavation for structures as per drawing and MoRD technical specifications Clause 305.1 including setting out, construction of shoring & bracing, removal of stumps & other deleterious material and disposal upto a lead of 50 m, dressing of sides & bottom and backfilling in trenches with excavated suitable material. I. Ordinary Soil i) upto 3 m depth.

Filling in foundation trenches as per drawing & MoRD technical specification Clause 305.3.9, 1200 (I) Sand filling

Providing concrete for plain concrete ( using jhama brick aggregate ) in open foundations complete including formwork as per drawings & MoRD technical specifications Clauses 802, 803, 900, 1202 and 1203. (including centring, shuttering, staging etc. but excluding reinforcement ) I. P.C.C grade M 10 ( using jhama brick aggregate ). (i)Nominal mix 1:3:6

Providing concrete for plain/reinforced concrete in open foundationscomplete including form work as per drawings &MoRD technical specifications Clauses 802, 803, 900, 1202 and1203. (including centering, shuttering, staging etc. but excluding reinforcement). V) R.C.C grade M-25

Providing & laying reinforced cement concrete in substructure as per drawings & MoRD technical specifications Clauses 800, 900, 1205.4 & 1205.5 (including centring, shuttering, staging etc. but excluding reinforcement ) II. R.C.C M 25 1. For height upto 5 m

Supplying, fitting&placing Thermo-Mechanically treated bar/ Cold twisted deformed steel bar reinforcement in foundation complete as per drawings &MoRD technical specifications Clauses 1000 & 1202.

Supplying, fitting&placing Thermo-Mechanically treated bar/ Cold twisted deformed steel bar in substructure complete as per draings & MoRD technical specification Clauses 1002, 1005, 1010 and 1202.

Providing and fixing in position Drainage spouts complete as per drawing & MoRD technical specifications Clause 1209

Providing & laying filter media with jhama brick aggregates as per specification to a thickness of not less than 600 mm with smaller size towards the soil & bigger size towards the wall & providing over the entire surface behind abutment, wing wall, return wall to the full height, compacted to firm condition complete as per drawing and MoRD technical specification clause 1204.3.8

Providing and laying flat brick brick soling layer on prepared subgrade according to lines, grades and cross-section shown on the drawing, filling joints with Earth, free from clay with a Plasticity Index not exceeding 6, watering and rolling the same with three wheeled road roller 80-100 kN as per MoRD Technical Specification Clause 412.

Providing and laying brick edging laid lengthwise on prepared subgrade according to lines, grades and cross-section shown on the drawing, filling joints with Earth, free from clay with a Plasticity Index not exceeding 6, watering and rolling the same with three wheeled road roller 80-100 kN as per MoRD Technical Specification Clause 412.

2) WBM Grading-3 Water Bound Macadam Sub-Base / Base using Jhama Brick Aggragate. Providing, laying, spreading and compacting 53 mm to 0.075 mm jhama brick aggregates to water bound macadam specification including spreading in uniform thickness, hand packing rolling with three wheel roller 80-100 kN in stages to proper grade and camber, applying and brooming, binding materials to fill up the interstices of coarse aggregate, watering and compacting to the required density Grading 3 as per MoRD Technical Specification Clause 405. (A) By Manual Means

Tack coat using hot straight run bitumen of grade VG30 on WBM Providing and applying tack coat using hot straight run bitumen of grade VG30 including heating the bitumen , spraying the bitumen, cleaning and preparing the existing road surface the existing road surface as per specification on WBM @ 0.75 kg / sqm

20 mm thick Open-Graded Premix Carpet using Bitumen(penetration grade/modified bitumen)binder Providing , laying and rolling of open-graded premix carpet of 20 mm thickness composed of 13.2 mm to 5.6 mm aggregates either using penetration grade bitumen or emulsion to required line, grade and level to serve as wearing course on a previously prepared base , including mixing in a suitable plant, laying and rolling with a three wheel 80 - 100 kN static roller capacity, finished to required level and grades to be followed by seal coat of either Type A or Type B or Type C or Type D as per MoRD Technical Specification Clause 508. Case-1.(i) Bitumen (60/70 Grade) VG-30 (A) By Manual Means

Seal Coat Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using Type A or Type B or Type C or Type D as per MoRD Technical Specification Clause 510Case-iv.Type-D(Premix with fine sand) (i) Bitumen(60/70 Grade)VG-30. A.By Manual Means

Providing weepholes in brick masonry/ stone masonry, plain/ reinforced concrete abutment, wing wall, return wall with 100 mm dia AC pipe or PVC pipe (110 mm OD of 6.0 Kg/cm2 pressure) extending through the full width of the structures with slope of 1(V):20(H) towards drawing face complete as per drawing and MoRD technical specification clauses 614, 709, 1204.3.7.

Construction of R.C.C railing of M 25 grade in cast-in-situ with 20 mm nominal size aggregate, true to line & grade, tolerance of vertical railing post not to exceed 1 in 500, centre-to-centre spacing between vertical posts not to exceed 2000 mm including reinforcement as per drawing and MoRD technical specifications Clauses 800, 900 and 1208.3 (including centering, shuttering, staging etc. and reinforcement).

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