Nigerian engineers say the design of the collapsed Lagos high site has changed News

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The 21-storey building that collapsed earlier this month was designed for only six floors, Nigerian engineers said.
Engineers said a 21-story building he fell The Nigerian commercial capital Lagos was designed for only six floors earlier this month before adding more to the structure.
The upper structure was still under construction in the city’s elegant Ikoyi district when it collapsed on November 1, trapping dozens of site workers and others inside.
At least 45 people were killed, including the owner of the building, and another 15 survived, according to a recent count by the state government.
Although the government has set up a panel to determine the cause of the collapse within a month, the Nigerian Organization of Structural Engineers (NIStructE) said the variations in the original design were to blame.
“There are clear indications of several short design changes to the project and the engineering and management of those changes appear to be highly inadequate,” NIStructE president Kehinde Osifala said Tuesday night.
“The building that was purchased was initially designed for only six floors, and then for 12 floors, before this was changed to 15 floors,” he said.
“It could not yet be established that the adequacy of any further revisions that were properly designed and documented were being established and fell to 21 floors (and tragically, definitely).”
Osifala said more than two structural-engineering-design firms were working on the project at different times.
“Previous research has also revealed some evidence of structural inadequacy in the building and that it has begun to show signs of a structural disaster within certain elements of the building,” he said.
Although some error-fixing measures are already being taken, “the method of implementing this was not in line with strong structural engineering practices.”
Since 2005, at least 152 buildings have collapsed in Lagos, a city of about 20 million people, according to data collected by researcher Olasunkanmi Habeeb Okunola of the Witwatersrand University in South Africa.
One of those incidents that particularly angered Nigerians was in 2014, when dozens of people were killed in a church collapse in Lagos.
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