Displaying items by tag: building collapse

Nigeria: Osita Anthony Aboloma, the Director General of the Standard Organisation of Nigeria (SON), has blamed poor cement as a major cause of building collapses. He made the comments via a deputy at a technical committee meeting for the review of the standard for cement (NIS444-1.2014) in Lagos, according to the Nigerian Sun newspaper. The standard is being reviewed for the next five years.

Also at the meeting, Joseph Odigure, the chairman of cement standards at Council for the Regulation of Engineering in Nigeria (COREN) at the University of Lagos, was appointed chairman of the technical committee. Professor Garuba Abu was appointed as its Vice Chairman.

Dangote Cement let everybody know this week that it is now producing 52.5MPa grade cement in Nigeria. The move was a response to building pressure from professional and civil groups in the country which have reacted in recent months to the high incidence of building collapses in the country. With the 42.5MPa grade looking likely to become the new legal standard, Dangote's adoption of an even higher standard looks like canny marketing.

The background to this tussle lies in the spate of building collapses that have plagued Nigeria in recent years. A widely cited paper in the Global Journal of Researches in Engineering from 2010 reported at least 26 incidents in Nigeria between 1975 to 1995 with 226 fatalities. Later figures from 2004 to 2006 reported at least 10 incidents with 243 fatalities, a significantly higher prevalence than in the earlier period. The paper recommended adopting standards for building materials such as cement among other measures. Since the publication of this paper news reports have been hard to collate. Commentators placed the toll at 15 collapses with 30 fatalities for the first eight months of 2013 alone.

The Standards Organisation of Nigeria (SON) reacted to the latest outcry over building collapses by saying that they were caused by poor application, such as a using the wrong quality of cement for a particular task, not poor standards. According to the SON, 32.5MPa grade cement is recommended for activities such as plastering, flooring, block moulding, culvert making and building simple domestic houses. 42.5MPa grade is designed for the construction of tall buildings, bridges and load bearing columns.

Adopting a national standard of 42.5MPa grade is intended to stop misuse of lower grade cement being used for the wrong applications. One example commentators have mentioned is how to help illiterate builders select the right kind of cement for a given task. Choosing an overall higher standard is one solution to this problem. Education is another.

One fact that has emerged from the debate is that, according to Dangote Chief Executive Officer DVG Edwin, the SON imposed 42.5MPa grade as the minimum for imports before most imports were stopped in late 2012. Edwin used this as an argument for the SON enforcing the same standard for domestic cement production. Anything that can cut the number of building collapses can only be a good thing.