As construction cost rises due to attendant rise in prices of building materials, the trend of building houses directly on sand has been observed to be on the increase especially by unscrupulous developers and contractors. Having carried out an independent monitoring of construction activities in some areas in the Ajah axis of Lagos lately, it became obvious that in order to save cost people have resorted to constructing buildings directly on sand.

The awkward idea been adopted in most of the cases under study is to sand-fill the land, level and compact it with the use of machines and construct a reinforced concrete strip foundation directly over it without recourse to minimum construction/engineering standards. They do so very quickly so that before any of the regulatory bodies saddled with the responsibility of building control gets wind of their ill act, they are already on super-structure level at which point it is burdensome to ascertain how the foundation was actually built.

On a particular site, using this vague method the entire foundation including the ground floor slab was put up in one week and by the next, they were already building up the walls and frame. Dishonest developers thrive in such indecent acts and sell or lease these buildings to unsuspecting prospective buyers who in-turn occupy them or cause others to do so by way of lease/rent too. There is no consideration for lives and properties put at risk of an imminent collapse even as some of the buildings observed are already exhibiting symptoms of instability and sick building syndrome pre-occupancy.

Five years post-occupancy, the building over-settles (or sink) and then tilt in a particular direction. When asked, some of these developers claim that before there will be any major issue with the building, they would have recouped the returns on their investment
and its left to the new owner to do a repair by way of underpinning as the need arises. To know that some greedy professionals have joined the bandwagon of quacks in delivering such poor structures is condemnable. This act should not be encouraged in any form.

Here are some structural considerations; normally after leveling and compacting operation has been carried out on a sand filling land, it still remains a made-up ground. Although the land becomes stiff at sub-surface levels, this doesn’t in anyway erase the fact that the underlying bad soil (or peat) remains intact and retains its poor attributes. Peats are highly compressible soils and will naturally compress upon the impact of load.

As this happen, the building will settle indiffernetially, especially during seasonal changes and mass movement of the earth; which occurs at various times of the year. Such structural anomaly often leads to poor stability of the building and eventually a collapse if unable to bear the load, especially for single or multiple storied structures. Rising cost of building materials should not be a yardstick to adopt poor construction methods in the construction methods in the construction of buildings and estate infrastructure anywhere.

The authorities should not turn a blind eye to such activities that jeopardizes or threatens the lives of people as well as the overall health of the built environment. Project owners and developers should not connive with contractors or builders to manipulate well established engineering principles. It is important to select cost-saving methodologies like the use of dry construction methods; cold brick construction etc. but bad construction methods is never the way to go. Do visit www.naijapropertiesonline.com for listings of buildings with solid and reliable constructions.


Source:
www.99propertyng.com/why-it-is-structurally-wrong-to-build-directly-on-sand/

www.naijapropertiesonline.com

Insightful...

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FTC on an educative thread. But why would a normal person build on sand before?

Because it's not good nonni

Who dey build house on top sand before?

Even if the architect graduated with Dino Melaye result.

Even a primary school pupil should know this.

I need to ask If! I am coming.

RoyalBoutique:
Who dey build house on top sand before?

I taya oh!

This is because the bearing capacity of the sandy soil is very low and wont be able to carry the load from the structure above. Hence you need to excavate to a stratum of soil where the CBR is high enough to carry the load from the structure.

On Christ the solid rock I stand all other ground is sinking sand. Well said op, I thought I was the only one whose took note of this structural anomaly

Except for soak away, there's a level to which you can excavate the peats. Building is a science that evolves with time thus birthing new techniques and methods for construction. I have said this for the umpteenth time, Lagos Island and part of the mainland that are swampy should embark on PILING+RAFTING in construction. Any other method can be applied but at the discretion of a professional engineer. Think Safety, Build safely. Have a wonderful day.

More enquiries
Engr. Daniel
TerraStone Shelters
07037629947

Op..who dey build on top sand before?

daamazing:
FTC on an educative thread. But why would a normal person build on sand before?

FTC?...

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RoyalBoutique:
Who dey build house on top sand before?

Even if the architect graduated with Dino Melaye result.

Contact us for granite and sharpsand

The reasons are as old as time itself.
Christ's parable explains it explicitly.

No Wonder there are houses that u can view their foundation level now due to erosion

Even scriptures condemn it. On Christ the solid rock I stand, all other grounds are sinking sand, all other grounds are sinking sand.


Don't build your life on fleeting pleasure of sex, money, false religion, etc. It will soon collapse as the op has noted. Build on gidigba rock that is Christ the son of the living God.

Man is mans own problem, Sharp practices everywhere , may God save us ., and tomorrow such developer will go to church singing and thanking God for his blessings

This like telling people reason why if you fall asleep in the morning you will wake up in the morning.Shikena!! [color=#000099][/color]

Because a house built on sand cannot stand, a house built on the rock is better

PropertiesNaija:
As construction cost rises due to attendant rise in prices of building materials, the trend of building houses directly on sand has been observed to be on the increase especially by unscrupulous developers and contractors. Having carried out an independent monitoring of construction activities in some areas in the Ajah axis of Lagos lately, it became obvious that in order to save cost people have resorted to constructing buildings directly on sand.

The awkward idea been adopted in most of the cases under study is to sand-fill the land, level and compact it with the use of machines and construct a reinforced concrete strip foundation directly over it without recourse to minimum construction/engineering standards. They do so very quickly so that before any of the regulatory bodies saddled with the responsibility of building control gets wind of their ill act, they are already on super-structure level at which point it is burdensome to ascertain how the foundation was actually built.

On a particular site, using this vague method the entire foundation including the ground floor slab was put up in one week and by the next, they were already building up the walls and frame. Dishonest developers thrive in such indecent acts and sell or lease these buildings to unsuspecting prospective buyers who in-turn occupy them or cause others to do so by way of lease/rent too. There is no consideration for lives and properties put at risk of an imminent collapse even as some of the buildings observed are already exhibiting symptoms of instability and sick building syndrome pre-occupancy.

Five years post-occupancy, the building over-settles (or sink) and then tilt in a particular direction. When asked, some of these developers claim that before there will be any major issue with the building, they would have recouped the returns on their investment
and its left to the new owner to do a repair by way of underpinning as the need arises. To know that some greedy professionals have joined the bandwagon of quacks in delivering such poor structures is condemnable. This act should not be encouraged in any form.

Here are some structural considerations; normally after leveling and compacting operation has been carried out on a sand filling land, it still remains a made-up ground. Although the land becomes stiff at sub-surface levels, this doesn’t in anyway erase the fact that the underlying bad soil (or peat) remains intact and retains its poor attributes. Peats are highly compressible soils and will naturally compress upon the impact of load.

As this happen, the building will settle indiffernetially, especially during seasonal changes and mass movement of the earth; which occurs at various times of the year. Such structural anomaly often leads to poor stability of the building and eventually a collapse if unable to bear the load, especially for single or multiple storied structures. Rising cost of building materials should not be a yardstick to adopt poor construction methods in the construction methods in the construction of buildings and estate infrastructure anywhere.

The authorities should not turn a blind eye to such activities that jeopardizes or threatens the lives of people as well as the overall health of the built environment. Project owners and developers should not connive with contractors or builders to manipulate well established engineering principles. It is important to select cost-saving methodologies like the use of dry construction methods; cold brick construction etc. but bad construction methods is never the way to go. Do visit www.naijapropertiesonline.com for listings of buildings with solid and reliable constructions.


Source:
www.99propertyng.com/why-it-is-structurally-wrong-to-build-directly-on-sand/

www.naijapropertiesonline.com

because the Bible said a wise man builds on the rock, while a foolish man builds on the sand....


meanwhile.. check my signature

RoyalBoutique:
Who dey build house on top sand before?

Even if the architect graduated with Dino Melaye result.

PropertiesNaija:
As construction cost rises due to attendant rise in prices of building materials, the trend of building houses directly on sand has been observed to be on the increase especially by unscrupulous developers and contractors. Having carried out an independent monitoring of construction activities in some areas in the Ajah axis of Lagos lately, it became obvious that in order to save cost people have resorted to constructing buildings directly on sand.

The awkward idea been adopted in most of the cases under study is to sand-fill the land, level and compact it with the use of machines and construct a reinforced concrete strip foundation directly over it without recourse to minimum construction/engineering standards. They do so very quickly so that before any of the regulatory bodies saddled with the responsibility of building control gets wind of their ill act, they are already on super-structure level at which point it is burdensome to ascertain how the foundation was actually built.

On a particular site, using this vague method the entire foundation including the ground floor slab was put up in one week and by the next, they were already building up the walls and frame. Dishonest developers thrive in such indecent acts and sell or lease these buildings to unsuspecting prospective buyers who in-turn occupy them or cause others to do so by way of lease/rent too. There is no consideration for lives and properties put at risk of an imminent collapse even as some of the buildings observed are already exhibiting symptoms of instability and sick building syndrome pre-occupancy.

Five years post-occupancy, the building over-settles (or sink) and then tilt in a particular direction. When asked, some of these developers claim that before there will be any major issue with the building, they would have recouped the returns on their investment
and its left to the new owner to do a repair by way of underpinning as the need arises. To know that some greedy professionals have joined the bandwagon of quacks in delivering such poor structures is condemnable. This act should not be encouraged in any form.

Here are some structural considerations; normally after leveling and compacting operation has been carried out on a sand filling land, it still remains a made-up ground. Although the land becomes stiff at sub-surface levels, this doesn’t in anyway erase the fact that the underlying bad soil (or peat) remains intact and retains its poor attributes. Peats are highly compressible soils and will naturally compress upon the impact of load.

As this happen, the building will settle indiffernetially, especially during seasonal changes and mass movement of the earth; which occurs at various times of the year. Such structural anomaly often leads to poor stability of the building and eventually a collapse if unable to bear the load, especially for single or multiple storied structures. Rising cost of building materials should not be a yardstick to adopt poor construction methods in the construction methods in the construction of buildings and estate infrastructure anywhere.

The authorities should not turn a blind eye to such activities that jeopardizes or threatens the lives of people as well as the overall health of the built environment. Project owners and developers should not connive with contractors or builders to manipulate well established engineering principles. It is important to select cost-saving methodologies like the use of dry construction methods; cold brick construction etc. but bad construction methods is never the way to go. Do visit www.naijapropertiesonline.com for listings of buildings with solid and reliable constructions.


Source:
www.99propertyng.com/why-it-is-structurally-wrong-to-build-directly-on-sand/

www.naijapropertiesonline.com

Its deferentially. Differential settlement is when the building settles abnormally. When its indifferent, it means it has not settled abnormally.

Pple will do anything for money.d question. Shld be hw many years jail time shld d building team get

kingkennedt:
Boost your account... see details below hit them were it hurts... smile to your account with others.

why don't you sell your daddy's car and his house, then use the money to play your tickets or games. even Dagote will ask you for loan

U re just confusing ursef mixing technical termz u cnt phantom...Cbr!! Bearing Capacity!!! Excavate to stratum bawo!!!Oga ade cam dwn

Structuralman:
This is because the bearing capacity of the sandy soil is very low and wont be able to carry the load from the structure above. Hence you need to excavate to a stratum of soil where the CBR is high enough to carry the load from the structure.

boost account

Check out this inspirational architecture video.....

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