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  • A building situated at Dosunmu Street, Off Amara Olu Road, Agidingbi, Ikeja collapsed yesterday with a resident identified as Mrs. Faisa confirmed dead.The building collapse was caused by a landslide which occurred in the area.

    Rescue operators and officers of the Nigerian Police reportedly stormed the area afterwards to ensure safety of lives and properties.

    Also, the Lagos State Commissioner For Environment, Babatunde Adejare, reportedly visited the scene of the incident moments after it occured. He however advised residents of the shanties in the area to evacuate adding that the structures would be demolished soon.

    See photos above

    Source: http://www.trezzyhelm.com/2016/09/photos-building-collapse-in-lagosone.html
    Below are some other reasons buildings collapses by my study.

    n all, I have discovered the major reasons why buildings fail structurally are
    1. Lack of professionals on the project. The some sub reasons that owners give are that they don't have money to pay them since their charges are avoidable. And also that they themselves have ideas about buildings etc. When there are no professionals on the project, such project will not have the necessary CORRECT designs/drawings. Such projects won't have the right professionals Supervising the Construction Process.
    2. Another major reason for Structural failure and foundation issues is the use of substandard materials. These include reinforcements, Sharp sands, Granites, Cement even Water etc. So many Rebars being used can easily cut or rust. Water that contains impurities is not safe for concrete a since those impurities attack the concrete. (Chemistry 101). A Man wanted quote one day and I gave him. But he went for one desperate Contractor who used filling sand to cast concrete! After 6 months, the suspended slab (decking) started vibrating like water bed. I was also called upon and i corrected it at a cost 3 times the cost to build a solid slab. In addition, using the same size of granite (coarse aggregate ) can weaken the concrete.
    3. Another reason for failure in buildings is the use of wrong methodology in construction. For instance there is a method whereby wet concrete is vibrated in order to expel voids and holes inside. If you are using pole Romance-Machine, it has to be poked into it left in there for brief interval and removed and poked somewhere else. Some quack roadside casters just use stick to shook here and there or hit here and there. Even if the vibrating machine is used wrongly, it will trap voids. Every construction work has best practice that if not followed, the result will be bad. Another example is that when a carpenter lays the 1x12 for first floor slab, every hole between the planks must be covered with well sliced cement bags nailed with tiny nails. This should be done before laying of reinforcement. Reason being that when casting is done, the wet concrete usually slip through those holes thereby weakening the lower part of the slab which is subjected to tensile stress. But due to the leakage of the concrete at that bottom, what plasterers usually do is to fill it with mortar before plastering suffix of slab. But don't forget that the reinforcement were exposed before. So structurally, the bottom reinforcement is nonexistent. So when there are tensile forces, the slab cannot withstand them and what do you get? CRACKS!!! Then your fine POP starts cracking, blocks starts detaching at first floor and even crack etc.

    There is a vital aspect of using inadequate foundation. The determination of the type of foundation a building requires is done by the Structural designs matched with the Soil Investigation/tests. The Structural Engineer through his Analysis estimates the entire loads that is coming on the foundation at various points. Where the foundation required is raft, he determines the depth that will be both SAFE and COST EFFECTIVE. But in a conflict between safety and Cost, the safety takes precedence or else the architect is called in to redesign the building to make it smaller/lighter.
    Last year, I did an entire structural designs for an estate at Elegushi in lekki. And the Owner insisted I reduce the raft to 750mm depth. But based on my designs, 750 depth will fail. So I didn't. By the time they the foundations were done to my standard, as soon as the ground floor slabs were completed, heavy rain fell and the ground floor of many estates around the site were submerged, all the ground floor of all his own estate were not flooded.
    That was when he knew I did a good job for him.
    Apart from flooding, the ability of the foun

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