Maintenance of Bailey Bridge at different locations under Chawmanu RD Block for the year 2026-27

Supplying & fitting fixing of the following spare parts for bailey bridges:-

Transom clamp

Bracing frame

Bracing bolt

Raker

Sway brace

Decan nut bolt

Steel work welded in built up section/framed work including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using steel etc. complete as required: In stringers, treads, landing etc. of stair cases including use of chequered plate wherever required, all complete.

Dismantling of existing bailey bridge type unit bridge inlcluding stacking of all the components as per direction of the engineer in charge (approved rate vide Agreement no. 12/EE/DD/PWD(R&B)/2021-22)

Carriage of steel type portable bridge with all accessories at work site including loading, unloading, stacking complete as per direction of the Engineer-in-Charge by mechanical transport lead upto 60.00 Km.(Rate vide approved agreement no. 12/EE/DD/PWD(R&B)/2021-22 of Dharmanagar Division PWD)

Erection of all components of portable steel type bridge having carriage way width 3.27 mtr. complete with steel decking, panel, bearing, post and other accessories as per direction of the Engineer-in-Charge.(Rate vide approved agreement no. 12/EE/DD/PWD(R&B)/2021-22 of Dharmanagar Division PWD)

Painting on Concrete/Steel Surfaces with Epoxy Painting two coats including prime coat with epoxy paint of approved brand on concrete/ steel surfaces after through cleaning of surface to give an even shade as per drawing and MoRD Technical Specification Clause 1701.

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.

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 centering 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 foundations complete including formwork as per drawings & MoRD technical specifications Clauses 802, 803, 900,1202 and 1203. (including centering, shuttering, staging etc. but excluding reinforcement). PCC M15(With stone aggregates) Nominial Mix(1:2:4)

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

3.4(301.5)Construction of Embankment with Material Obtained from Borrow Pits Construction of embankment with approved material obtained from borrow pits with all lifts, transporting to site,spreading, grading to required slope and compacting to meet requirement of Tables 300.1 and 300.2 with a lead upto 1000 m as per MoRT&H Technical Specification clauses of section 301.5.