tender for construction of gallery at pokhreybong high school; 1 excavation for structures earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, removing, spreading or stacking of spoils within a lead of 150 m. as directed and including trimming the sides of the trenches, leveling, dressing and ramming the bottom, and backfilling with approved material complete as per direction of the engineer-in-charge . 2 plum concrete work with 40 % cement concrete with 30 mm down graded stone metal and 60% stone boulder of size 150 mm and above, placed in position as directed excluding shuttering if any. (i) (1:3:6) proportion. 3 hire and labour charge for shuttering with centreing and necessary staging up to 4 m. using approved stout props and thick hard wood planks of approved thick ness with required bracing for concrete slabs, beams, columns, lintels curved or staight including fitting fixing and striking out after complection of works. (up to roof of ground floor). (a) 25 mm. to 30 mm. thick wooden shuttering as per decision & direction of the engineer-in-charge. .