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Causes of building failures in Africa: A case study on collapsing structures in Kenya

  • January 2014
DOI:10.9790/1684-11370910
Authors:
Jackson MUSYOKA Kioko at National Institute of Technology, Warangal
Jackson MUSYOKA Kioko
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IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE)
e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 11, Issue 3 Ver. VII (May- Jun. 2014), PP 09-10
www.iosrjournals.org
www.iosrjournals.org 9 | Page
Causes of building failures in Africa: A case study on collapsing
structures in Kenya.
Jackson Musyoka Kioko
(A Bachelor of technology student & a Kenyan scholar, Civil Engineering department at National Institute of
Technology-Warangal, India)
Abstract: This article elaborates the various causes of building failure in Africa, particularly Kenya. In
addition to various causes that lead to collapse of buildings, Lack of African code of practice can also be a
factor that should be put in consideration. Most codes of practice used in African countries are foreign codes
either from Britain or Indian codes yet we use local materials for construction.
Keywords: building; code of practice; collapse; Life & properties; materials.
I. Introduction
The cases of building failures and consequent collapse of structures in Kenya had reached an alarming
stage in the past few years. Reporting collapsed buildings in the country was comparable to flood disaster,
earthquake and aeroplane clash considering the loss of life and destruction of property in different parts of the
country. As I prepare this article, there is a sense of relief in the country as far as building collapsing is concern,
not because people have stopped doing construction work, but as a result of safety measures currently being
practiced in the construction industry along with tight government precautions. The aim of this article is to
elaborate various cases that occurred in the country leading to loses of lives and properties. It also mentions the
causes which could have caused such incidents, along with various suggestions which were not included in
speculations.
II. Collapsed buildings.
A five-storey building under construction collapsed in the central business district in Nairobi, in
January 2013. The building began to sway, then quickly
collapsed, killing at least 11 and injuring dozens. More than
280 construction workers were inside when the unfinished
structure in central Nairobi came down. Over 200 people were
trapped under the debris of the collapsed structure. Several
people remained trapped for hours and could be seen signalling
for help from under the debris with their hands. At least 90
people were pulled out of the rubble alive, but six of those later
died of their injuries Bystanders, including children, were
injured by collapsing material.
In kisumu city, a building adjacent to Imperial Hotel
tumbled down when workers were preparing to call it a day.
Most of the victims were day labourers and the construction
manager was said to have run away immediately the incident
occurred. Efforts to reach him remained futile as his phone
was off after the incident. Scores of people were still trapped
inside the debris even as rescue efforts led by the Kenya Red
Cross, fire fighters and police continued overnight.
Another incident occurred in which a 4-storey building that
was partly under use though under construction in Mlolongo, along
Mombasa Road, collapsed in on Saturday 9th June 2012, leading to the
deaths of five people and injury of ten others. It took the Fire Services
ssUnit, the Kenya Police and other stakeholders an overnight search
and rescue operation where by five bodies were finally retrieved from
the rubbles and ten injured people rescued and taken to the Hospital.
The operation took almost 36 hours.
Fig 2: collapsed five storey building in Nairobi
Fig 1: collapsed four storeys in kisumu,
Kenya.
Causes of building failures in Africa: A case study on collapsing structures in Kenya.
www.iosrjournals.org 10 | Page
III. Reasons suggested to have caused the failures
All the above incidences resulted to loss of lives
and property, but the question that begs many answers is
why do these buildings collapsed, and how will this be
brought to an end?
A number of reasons had been given to explain why these
buildings had collapsed and these include reasons like the
concrete mix ratio being not right, lack of enough
planking and strutting in place to uphold excavations, the
column spacing being too wide, poor reinforcement, the
slenderness ratio being too high, cost cutting by
contractors by changing recommended concrete mix or
reducing the amount of reinforcement recommended
and a multitude of other reasons.
Generally, building failures occurs due to use of
sub-standard building materials, poor workmanship by
contractors, use of incompetent contractors, faulty construction methodology, heavy downpour, non compliance
with specifications or standards by developers and contractors, lack of supervision, poor inspection &
monitoring, structural defects, defective design/structure, illegal conversion and alterations.
IV. Recommendation and suggestions
As responsible professionals in the built environment, I think it is good for the construction companies
to emphasize the need for use of qualified personnel in all construction activities as a step towards restoring
sanity in the industry. The tragedies are likely to keep occurring if left unchecked as construction activities
increase. The inability of Kenyan construction industry of having its own code of practice is another factor that
should be put into consideration. This would have taken into account the quality of the local materials used in
construction. For instance, it is important for the aggregates used in making concrete to be free from impurities
and the sand used to be free from silt and clay. Presence of impurities in concrete reduces its comprehensive
strength hence this aspect should be highly monitored while doing construction.
V. Conclusion
In order to reduce the incidences of building collapse in any country, the national society of engineers
and other government agencies should work on availing a code of practice which will match on the local
materials used in a particular region. They should also make sure that the client employs a qualified engineer to
supervise the project. The government should also play a key role of ensuring that all projects meet the required
standards before they are laid on site. Any sort of corruption, poor governance or poor construction materials
that do not meet the required standards of construction will always lead to loss of lives and properties.
References
[1] Kenya Red cross Society documentary 2013:-
http://www.crisocial.net/index.php?option=com_hwdvideoshare&task=viewvideo&Itemid=8&video_id=584
[2] Kenya digital standard news on collapsed structures in the various parts of the country.
http://www.standardmedia.co.ke/?articleID=2000075293
[3] 2012-2013: Concrete technology class-notes on major causes of building failure through various case studies on durability of
concrete structure by Prof. Rathish Kumar Pancharathi, National Institute of Technology, Warangal, Department of
Civil Engineering, India.
Author
Jackson M. Kioko
Civil Engineering Department,
506 004, National Institute of Technology, Warangal
Andhra Pradesh, India.
E-Mail: jackrosemk@gmail.com
Fig 3: Trapped workers in a collapsed 4-storey building.
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