Improvement works to Science park at Alagappa Road in Ward No.68, Central Zone.

Earth work excavation and depositing on bank with initial lead of 10 meters and initial lift of 2 meters in hard stiff clay, stiff block cotton hard red earth, murrains, gravel stoney earth and earth mixed with small size boulders and hard gravel soil etc., complete as per standard specification.

Plain Cement concrete 1:4:8 [one cement, four M-sand and eight course aggregates] using 40mm size Hard Broken/Machine crushed Granite Stone Jelly including dewatering if found necessary and laid in layers of not more than 15cm thick and compacted etc., complete complying with standard specification.

Supplying and erecting centering to sides and soffits including supports and strutting for drainage sides and culvert body wall sides using 90cm x 60cm and B.G 10stifened with welded mild steel angles of size 25mm x 25mm x 3mm for boarding laid over (silver oak joists) of size 10cm x 6.50cm spread at about 90cm etc. complete complying with standard specification.

Plain Cement Concrete 1:3:6 (one cement, two fine aggregates and four coarse aggregates) using 20mm size ISS HBG metal including cost and conveyance of all materials to site and including for the mixing, laying and labour charges etc., complete as per standard specification.

Plastering with cement mortar 1:5 mix, 12mm thick - 1 m2 etc Complete as per directional of Departmental Officers.

Providing and laying of Rubber Moulded Hydraulic Pressed Paver Block size 63mm thick in uniform shape of approved make to be laid in herring bone pattern with approved non sticking surface in the top and the rate including leveling 6 the base, preparation of sub base with sand cushion 100mm thick, laying out the pavement, cut the pieces to fit the edge, vibrating the pavers, sweeping the sand grouting, providing transporting, loading unloading and laying of paver block as per standard specification

Supply and Filling with well gravel layer by layer including cost of watering, consolidation,ramming and cost and conveyance of all materials etc., complete as per specifications.

Worm Wheel Mechanism

Crystal Structure Model