underground drainage system@gp mungsare - 1 laying and jointing pvc pipe. heading 2 item no 1 providing isi standard r.c.c.pipes in standard lengths of following class and diameter suitable for either collar joints or rubber ring joints, excluding gst levied by goi & gom in all respect including inspection a) 300 mm dia np2 rcc pipe 3 pipes in standard lengths of following class and diameter suitable for either collar joints or rubber ring joints, excluding gst levied by goi & gom in all respect including inspection a) 300 mm dia np2 rcc pipe 4 item no.3:excavation for foundation / pipe trenches in hard murum including removing the excavated material upto a distance of 50 m and lifts as below, stacking and spreading as directed by engineer-in-charge, normal dewatering, preparing the bed for foundation and excluding backfilling, etc. complete.bd-a-2/259)a) hard murum 5 item no 4 excavation for foundation / pipe hard murum and boulders, w.b.m. road切 including removing the excavated material upto a distance of 50 m beyond the area and lifts as below, stacking and spreading as directed by engineer-in-charge, normal dewatering, preparing the bed for foundation and excluding backfilling, etc. completo bra-a-2/2/50) trenches in 6 item no 4: lowering, laying and jointing in proper grade and alignment r.c.c. pipes with collar joints in c.m. 1:1 proportion or socketed r.c.c. pipes with rubber joints (excluding cost of rubber ring or r.c.c. collar,) including cost of conveyance from stores to site of work, cost of jointing material, labour, etc. complete as of jointing material,pipes.) as per is-783-1985. labour, etc. complete as directed by engineerin charge (for all class of ) 300 mm dia np2 rcc pipe 7 item no. 5:filling in plinth and floors murum bedding in trenches with approved murum from excavated materials from foundation 15cm to 20cm lavers including watering and 8 item no: 6 providing and laying in situ cement concrete of trap/granite/quartzite/ gneiss metal for pcc work below foundation and footing including normal dewatering,plywood form work, compaction, finishing and curing, etc, complete. 9 item no 7: providing and constructing b.b. masonry valve chamber with 15 cm thick 1:3:6 proportion pcc bedding, excluding excavation, b.b. masonry in c.m. 1:5 proportion precast rcc frame and cover, etc. complete as directed by engineer-in-charge. 10 item no.8: refilling the pipe line trenches with available excavated stuff with soft material first over pipeline and then hard material in 15 cm layers with all leads and lifts including consolidation, watering etc