In
the article “4 Ways to Demolish a Building”, Juan Rodriguez (2018) states that
there are many considerations to take before resolving the way to demolish a
building, and the method used must be safe for the demolition crew and
surroundings. He mentions 4 ways to demolish buildings. Firstly, implosion is a
technique which uses explosives to demolish large structures in urban area and
it requires comprehensive planning by the blaster crews before carrying out.
Secondly, high reach arm method is used to tear down tall buildings from the
top by operating machine arm. Thirdly, wrecking ball method demolishes
buildings by swinging a heavy ball into the structure. The building size is
limited by using this method. Moreover, it requires professional crane operator
and will cause pollutions. Lastly, selective demolition is an environmentally
friendly and cost saving method as it allows to recycle materials. However, it
requires manpower and not efficient for light-framed buildings.
The
article mentions that large structures are commonly demolished by using
implosion technique in the urban areas. However, bring down a building by explosives
is not applicable when the buildings are close together. Moreover, it will
result in pollution to the city and may endanger the surroundings. Thus, high
reach arm method is more suitable to be implemented in urban area.
References
Aqil Haziq Mahmud. (2017). No explosives or swinging balls: How
high-rise demolitions go down in Singapore. Channelnewsasia. Retrieved from https://www.channelnewsasia.com/news/singapore/no-explosives-or-swinging-balls-how-high-rise-demolitions-go-9425362
Chitra Ramaswamy. (2015). ‘You can’t really test explosives’ – why
demolitions go wrong. The Guardian. Retrieved from https://www.theguardian.com/business/shortcuts/2015/oct/12/explosives-demolitions-go-wrong-red-road-flats-glasgow-controlled
High-Reach
Excavators Increase Demolition Accuracy. (2012). Elder Demolition. Retrieved,
September 27, 2018 from https://www.elderdemolition.com/commercial-industrial-demolition-high-reach-excavators-benefits-09-2012/
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