The client’s requirement was to form new staircase openings from Level 5 to Level 3 through 380mm-thick reinforced concrete slab – all within an occupied building.
The works were carried out at night; however, no percussion vibration was permitted due to the close proximity of residential premises.
This meant that a different method had to be employed, which was to diamond drill and saw cut (using 110v and 3 phase electric equipment) the 5m x 4m area into manageable sections. These could then be lifted and removed in a controlled and quiet method, suiting the client’s requirements and with minimal noise produced.
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