A closer look at the world’s largest demolition machine.
Last week, we brought you some exclusive footage of what is claimed to be the world’s largest demolition machine: a modified Komatsu PC4000 that was delivered to McMahon Services in Australia.
The video lit up our viewing figures and captured the imagination of demolition company owners and excavator operators the world over. And so we’re delighted to bring you some more in depth footage of that machine:
Urban explorers breach security to scale 22-storey Birmingham tower.
In my time, I have abseiled down a 20-storey tower block as part of an organised charity event, and I have climbed numerous tower cranes as part of my job. Heights do not bother me. But I can’t bare to watch this video that shows “urban explorers” taking their lives in their hands to scale the 22-storey Natwest Tower in Birmingham while it was undergoing demolition.
Keltbray calls upon one of world’s largest land cranes.
UK demolition giant Keltbray has employed one of the largest cranes in the world – the AL.SK190 – to remove and replace the 110 to 1,650-tonne beams that supported the weight of the recently-demolished Earl’s Court exhibition centres above the London Underground lines.
The machine has a 4,300 tonne capacity strand lift system and a 4,000 tonne capacity winch system. The unit, recently shipped from a previous application in Turkey, rotates around 4,000 tonnes of ballast, carrying out all lifts from a single, fixed position. Fully erected, the machine is 120 metres tall.
We will be covering the crane in more detail in the next edition of Demolition magazine. But, in the meantime, please check out this exclusive video:
As anyone that has ever been near or by a Rammer breaker in full flow, those Finns know a thing or two about hammers. So we were intrigued to learn that a bridge deck in Finland was being demolished using a drop-hammer.
Built in 1977, the bridge is 170 metres in length and 12 metres wide and is being demolished by contractor Huhtakallio. After removal of surface, the bridge deck was fractured with an MEP Breaker drop-hammer fitted to a 45 tonne class excavator.
Weighing nine tonnes and featuring a four tonne “bullet”, the drop hammer delivers an impact force of 200 kJ. This massive impact loosens the rebar from concrete, weakening it and making it easier to process further with a traditional hydraulic hammer and a crusher installed on smaller excavator.
Petri Kiiskinen, sales manager of MEP Steel says the contractor Huhtakallio has demolished dozens of bridges using the same method. It has used drop hammers for 20 years, and have influenced the development of the MEP breaker. The result is a simple, reliable and powerful machine. Most important of all, the operating cost is kept low, without compromising the productivity.
According to the company, a typical 500 m3 bridge is often demolished with two heavy hydraulic hammers and a pulverizer. “When one of the hammers is replaced with an MEP breaker, the productivity easily doubles, even triples,” Kiiskinen says.
Erith Contractors has been shortlisted for this year’s National Grid Property Awards, providing recognition of exemplary performance across the past 12 months. The awards ceremony, which will be hosted in the Hilton Hotel Bankside in London, welcome a number of industry leading consultants, designers and contractors, all associated with delivering National Grid Property Projects.
Erith’s shortlisted nominations include the following:
Most Considerate Projects – demolition of Taplow Gasholder, the remediation of Stony Stratford and the demolition scheme at Rochdale gasworks.
Best Stakeholder Engagement – the community engagement involved within the demolition scheme at Rochdale gasworks.
Best Large Project Delivery – the pre-sales programme of works at Staines and the demolition and infill associated with Rochdale gasworks.
Best Small Project Delivery – the pre-sales programme of works at Borehamwood
Best SHE Leadership – focusing on the Group’s health, safety and environmental performance achieved across National Grid’s Property portfolio within the past 12 months.
Best Project Documentation – in recognition of the quality of Erith’s project documentation.
The awards recognise excellence within the supply chain and reward property projects that have shown outstanding results.