Our long-term client Mainbrace Constructions engaged Perfect Contracting to deliver a technically challenging penetration project in Central Park Mall at Chippendale.
There were many technical challenges to the project. As this mall is a multi-purpose building with residential housing there were strict noise restrictions to adhere to so noisy works could only be carried out from 7 am to 10 am. Also, the slab was 4 meters from the slab below which meant the design and installation of extensive multi-props to create a catch deck.
Scope of work
- Supply and installation of 16 x 1200 x1200 multi-prop 480 Frames with braces rated at 35kN under the existing beams.
- Supply and installation of 56 x 1200 x1200 multi-prop 480 Frames with braces rated at 20kN under the existing beams.
- Supply and installation of 30 x MP480 Multi-prop rated at 20kN/leg
- Perfect Concrete Care to road saw slab and wire cut beams
- Perfect Contracting to hammer, crush and remove concrete slab
- Retain existing post-tensioned cables in the slab
- Remove and recycle clean concrete and steel
Once the multi-props were installed, the next challenge was the cutting and demolition of the slab. Using two of our Brokk 200 demolition robots which run off 3-phase power eliminates issues of toxic emissions from petrol/diesel powered machines.
Additionally, the added benefit of the Brokk robots is their size-to-power ratio. They are small enough to fit in a three-tonne service elevator but can output the same kJ power as a fifteen-tonne excavator. This allows our operators to hammer and crush through concrete more efficiently while mitigating risks and drastically improving safety.
Perfect Contracting acknowledges the Aboriginal and Torres Strait Isander people as Traditional Custodians of the country on which we live and work. We pay our respects to the Traditional Custodians and Elders past, present and future, and honour their connection to the land and ongoing contribution to society.