In the article, “4 Ways to Demolish a Building,” Rodriguez (2018) has
stated that ways to demolish a building depends on the area, material, purpose
of demolition and dispose of debris. The author implies that the implosion
method is suitable for large scale building, by destroying the main beams. The
explosive placement and order of demolition are important. He further suggests
detailed study of the structure drawings and timing of the detonation is
required. The author stated that high reach arm method involved the removal of
inter-connected beams. Suitable for the
buildings above 20 meters and safer alternative compared to the wrecking ball
demolition. Expert is required to operate the wrecking ball during demolition due to
space constraint and equipment load. The author mention that this method emits
dust, vibration and noise. The author stated that selective demolition is a
cost saving method suitable for the reuse of materials for future construction.
High labor and time are needed for selection of reuse materials.
Thesis statement: Based on the
points elaborated, although the writer addressed the four ways to demolish a
building, he could have mentioned other demolition methods which are commonly used in the industry.
First of all, the writer should have included the
top-down demolition method. This method hoisted the concrete
breakers and crushers machines to the rooftop and demolish the building from a
top-down manner floor by floor. In the article “No explosives or swinging balls: How high-rise demolitions go down in
Singapore” (2017), wrecking balls and
explosives demolition are not suitable for high and compact buildings. The
top-down demolition began with floor slabs, followed by the beam, column and
the foundation. Dust emission could be reduced by using a mist machine. Clean
concrete from demolition debris are recycled to build footpaths and roadside
drains. After demolition the ground must be filled with soil to ensure the grass
grows. Based on the news report “Rochor centre to be torn down floor by floor.” (2018), a
demolition specialist Mr Tay stated:” This is the conventional method of
tearing down buildings,”
No explosives or swinging balls: How
high-rise demolitions go down in
Singapore. (2017). Channel NewsAsia.
Retrieved, December 31, 2017
from https://www.channelnewsasia.com/news/singapore/no-explosives-or-swinging-balls-how-high-rise-demolitions-go-9425362
Wong, D. (2018) Rochor Centre to be torn down floor by
floor. The Straits Times.
Retrieved,
June 27, 2018
from https://www.straitstimes.com/singapore/housing/rochor-centre-to-be-torn-down-floor-by-floor
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