Common use of Risk of collapse of excavations Clause in Contracts

Risk of collapse of excavations. 3 Sides of trench and hole excavations not exceeding 1,5m deep. m2 30 Carried to Collection Section 3 Bill No. 4 Rainwater Tanks and Stands R Earth filling obtained from the excavations and/or prescribed stock piles on site compacted to 93% MOD AASHTO density: 4 Backfilling to trenches, holes, etc. m3 5 Earth filling (G5 material) supplied by the contractor compacted to 98% Mod AASHTO density: 5 Under footings. m3 5 Compaction of surfaces 6 Compaction of ground surface under floors, etc including scarifying for a depth of 150mm, breaking down oversize material, adding suitable material where necessary and compacting to 90% Mod AASHTO density. CONCRETE, FORMWORK AND REINFORCEMENT m2 20 UNREINFORCED CONCRETE CAST AGAINST EXCAVATED SURFACES 25 Mpa/19mm Concrete 7 Strip footings. m3 5 REINFORCED CONCRETE 25 MPa/19mm Concrete: 8 Tank concrete slab. m3 2 Carried to Collection R Section 3 Bill No. 4 Rainwater Tanks and Stands