construction of pathway and providing and laying of pavers at ee eht c dnii gwalior office premises in 220 kv ss mahalgaon campus , earth work in excavation by mechanical means/manual means over area ( excluding 30 cm in depth 1 . 5 mtr in width as well as 10 sqm on plane ) etc . , p/l in position cement concrete of specified grade 1:3:6 ( m-7 . 5 ) , p/l in position cement concrete of specified grade 1:2:4 ( m-15 ) , p/l 60mm thick factory made cement concrete interlocking paver block of m-30 grade made by block making machine with strong vibratory compaction , of approved size , design and shape , laid in required colour and patter over and including 50m thick compacted bed stone dust , filling the joints with sand etc . all complete as per the direction of engineer-in-charge .