lastpage:



@Brabus, @AbdulWastecx and @Spyderman

I am looking at the attached Suspended Slab and two things crossed my mind.

1.) Those voids below the Suspended Slab are surrounded by four sides of vertical concrete Walls. This means each "cubicle" is an enclosed space.
Since they are not sand-filled, it also means they would have water stored in them, below the suspended Slab.

I am wondering, will it be a bad idea to introduce a small PIPE in one of the sides of the vertical walls so as to act as a channel for such water to flow-away, in situations where the really become much?
It wont cost anything structurally but could help elongate the life of the structure or at least make underneath more "homely"!


2.) Those 1 x 12 Boards used to create the suspended slab will number no less than 300! At about a thousand each, that equates to about 300K!
I am not sure but l am assuming those Boards will be permanently buried under the Slab.
Since there is still a lot of need/use for those Boards as the building develops, l am wondering: Is there any way those Boards can be recovered (say for re-use).

I am always looking for ways to "innovate and be more efficient" in everything l do, so you can understand the way l see things.... maybe a lil'different.

whats your take?




Lastpage!

To your first question...
The condition of the enclosed space below depend on the natural water table, and surface run off during period of heavy rain. If the soil is relatively dry with a very low water table (>1.5m), the void below will be dry, otherwise, it may experience dampness and surface water.

Nothing to worry about if the damp proof course/german floor is water/air tight, so that it wouldn't become a breading ground for mosquito.

The grade beam a position at some depth below the ground to stop surface run off into the space below.

2. For your questions number 2.
The cost of the formwork for the suspended ground floor may be more than 300k as you have rightly highlited since you fail to put into account the cost of the following items, 2' x 4'*runners, nail, supporting bamboo, and workmanship. Putting all these cost into consideration may drive the cost to be twice the earlier estimate of 300k''. Having say this, I still believe it is a wise decision and a cost effective method compare to the cost of filling the supposed raft* ( structurally it is not a raft) . It may cost more than 1.5m to fill and compact the foundation up to that level, and it will take too much time to achieve that. There is also danger of poor compaction.

Another advantage is the possibility for a properly done iron detailed work when the floor is suspended. For this suspended floor, the iron bending work are properly done compared to those on filled foundation.

3. I am also looking deeply into better use of modern building materials. I have done a number of design using polystyrene materials for the following, in other to reduce load and cost.

1. Use in slab foundation or rib raft construction to reduce weight, save some concrete volume and reinforcement (ultimately cost) and to have a cleaner and faster construction. ** this method will be very good on soil with very low bearing capacity and high water table (since all polystyrene are damp resistance).

2. Use as a rib slab or waffle slab to reduce the self weight of slab by replacing some volume of concrete. It has three major advantages of light weight, cost effective and faster/cleaner construction - light weight because it will replace concrete volume, cost effective in the form less concrete/steel/formwork and fast construction because it can easily be installed.

3.Use in internal portion walls to reduce load on high rise building and cost. It is cost effective since such wall will not required further surface finishing like plastering and screeding. It also allow your structural framework or layout to be flexible because you wouldn't have to worry about heavy portion load since it is light weight.

4.Use for ceiling finishing, better than pop on cost and aesthetics. It can be use in place of pop, it cost less, faster to install, neater in construction and much lighter. It also have an added advantage of ability to withstand leaking roof because water can't pass it it or spoil it. When you install, you go to bed.



With all these advantage in mind, sound Mathematical calculations have to be made to make sure all the structural component are designed properly in other to enjoy all the aforementioned advantages

Jessam:


Ok sometimes we don't understand what the term raft foundation exactly means. The term raft is related to the term raft boat. google raft boat. A raft foundation just like a boat needs to be water tight , if not the boat will capsize because of the water that gets in causing it to be unstable or over weight, water is heavy (hence why blocks are not used because the cement/mortar used to bond the blocks together will fail over time and lead to water entering the boat/foundation) another important requirement is that a raft/boat also needs to be stable , imagine if you have 10 fat people in front of the boat and two skinny people at the back of the boat what happens? the boat tips if you are lucky to the front, but mostly likely will capsize. Now the importance of the gutter is this, The more soaked the soil is the less its weight carrying ability,so if the water from the roof hits the area exposed to this deluge of water, the part of the raft foundation close (underneath and by the side)to this water soaked soil is now perched on soil that has less weight carrying capabilities, so guess what happens ? the raft becomes unstable like the boat with the fat and skinny people on board mentioned earlier on. This area of the foundation starts sinking but not the whole slab, it then means that parts of the walls are being pulled meaning they will start cracking, serious fractures will occur in the wall system holding up the house, the house could then collapse/capsize like the boat.

Although I am an experienced builder I am also a farmer, so please spread the word about Jessam Cattle Ranch and Farms. We have great pigs, chickens, eggs, ducks, goats, cattle etc

Segcymoor is currently working in partnersghip on one of our (Dolphin Real Estate) residential building projects - https://www.nairaland.com/2753189/wing-duplex-flat-ajah-moore

Your sketch below is more like slab foundation and not raft foundation.

Raft foundation is a form of shallow foundation (but not founded on grade). It is in the same family with slated pad, combined footings, trapezoidal footings and cantilever footing. In the case of raft, the floor load intensity ( the load from all the pillars/columns divided by the total area of the building) will make the introduction of individual footings to overlap, hence it now become uneconomical to design individual pad footings, a raft foundation is used.

The raft can an ordinary slab founded at a depth of not less than 1.5m in most cases below the ground surface.
Before any bending and share calculations are carried out, the following simple structural calculations are carried out.

1. Estimation of floor load intensity.
2. A trial raft dimensions is chosen; B and L, where B= breath and L= length.
3. This raft is then check for bearing capacity and settlement.
To carried out these check, a soil profile of cpt soil test is sketch showing all the soil profile with the following information, for cohesive soil, we have cu, dry unit weight of soil and saturated until weight, depth of each strata, modulus of elasticity, consolidation parameter etc.

After the bearing capacity has been calculated, the result must not be less than floor load intensity x F. O. D (factor of safety, which is taken as 3 for cohesive soil).

For the settlement estimation, it is divided into two. Initially or immediate settlement and consolidation settlement. This value must also be less than 100mm for cohesive soil.

In summary, a well detail Geotechnical work with good laboratory result and a well structural design raft will not fail throughout it service life

EgunMogaji:


1) I literarily loud out loud each time I see it.

2) The policeman is hefty like me but is determined to catch the thin guy and he did. Look at his stride.

3) The thin guy is an artful dodger who is used to getting whipped so he's demonstrating his dodging skills.

I love pictures that tells stories

EgunMogaji, I must confess that I adopted 'the siddon look' strategy when you were ardently supporting Brabus against Q1C. I'm sorry to say that I'm personally not sympathetic with Q1C because he was the architect of his own misfortune as far as his dealings with Brabus was concerned. The reason why I believe that Q1C was the architect of his own misfortune was that the handwriting was on the wall as per the untrustworthiness and incompetence of Brabus as a builder. I remembered vividly that Brabus was having a dual altercation with Ahonohai and the owner of Ile-Oluji Chateau on this forum and it was very messy. It was while Brabus was having issues with the two aforementioned clients that QIC arrived from Canada and publicly announced on this forum that he's awarding the building of his house to Brabus irrespective of the fact that he was having a spat with his two previous clients. Why should I waste my sympathy for a guy who is not clever enough to learn from other people's misfortune but chose to add himself to the list of Brabus' victims? I knew there and then that it was all going to end in tears and the tears will be for the guy that parted with his money rather than the recipient.
Brabus was on my radar when I wanted to build my house in Mayfair Gardens Estate Awoyaya-Lekki but I was lucky to witness the spat between him and his clients and that made me to regard him as a pariah not to be touched with a barge pole. Brabus is very savvy and flawless with presentation but his nemesis is that he believes that he can take on his dissatisfied customers that ventures to complain about his shortcomings. This attitude of his is the reason why he's made enemies ten times more than the nearest dodgy builders on Nairaland. He lacks customer service doctrine and he doesn't believe in the mantra that 'the customer is always right'
One other problem with him is that he's too vocal and believes he has a sacred duty to participate in every discussion on the forum and that singular act depicts him as somebody who is not focused. I would have thought he would borrow a leaf from the other seasoned builders like Spyder, Segccymoor, Abdulwastec, Aventures, Segzy14 and others who spend most of their time doing their job rather than getting bogged down with getting involved and displaying arrogance of knowledge in every discussion taking place on the forum with unverifiable claims and images which is often disputed by the owners. I remember a guy on the auto forum by the name Inspired autos who happens to be on the autos section what Brabus is on the property forum but the difference is that Inspired has been banned on the auto forum due to endless complaints by his clients.
I don't know how long the moderators will allow Brabus to get away with his sharp practices on Nairaland.

lastpage:



@Brabus, @AbdulWastecx and @Spyderman

I am looking at the attached Suspended Slab and two things crossed my mind.

1.) Those voids below the Suspended Slab are surrounded by four sides of vertical concrete Walls. This means each "cubicle" is an enclosed space.
Since they are not sand-filled, it also means they would have water stored in them, below the suspended Slab.

I am wondering, will it be a bad idea to introduce a small PIPE in one of the sides of the vertical walls so as to act as a channel for such water to flow-away, in situations where the really become much?
It wont cost anything structurally but could help elongate the life of the structure or at least make underneath more "homely"!


2.) Those 1 x 12 Boards used to create the suspended slab will number no less than 300! At about a thousand each, that equates to about 300K!
I am not sure but l am assuming those Boards will be permanently buried under the Slab.
Since there is still a lot of need/use for those Boards as the building develops, l am wondering: Is there any way those Boards can be recovered (say for re-use).

I am always looking for ways to "innovate and be more efficient" in everything l do, so you can understand the way l see things.... maybe a lil'different.

whats your take?




Lastpage!

I was just wondering. Don't know if it can be done. I read Abdulwasteq's reply that the floor is waterproof to prevent surface water from entering the enclosure. But I think the problem is, like you rightly pointed out, the walls supporting the suspended slab will always be soaked in water.

Also, I think the presence of the spaces will create additional loads on the slab.

After fixing the formwork that will support the slab (before fixing the soffit boards), can't the builder fill the spaces with sand/granite/laterite just to mitigate any negative effect. Maybe perforated pipes can be buried under the slab sef, channelling somewhere away from the house. Just saying.

ANBAKO:

Thanks @Mufutau55. I found this.
Do good for good to come your way!

Yes. That one sir.

Hajji M.

EgunMogaji:


1) I literarily loud out loud each time I see it.

2) The policeman is hefty like me but is determined to catch the thin guy and he did. Look at his stride.

3) The thin guy is an artful dodger who is used to getting whipped so he's demonstrating his dodging skills.

I love pictures that tells stories

You have no idea how that picture crank me up bro. Looking @ the police's trouser and his belle....I go just dey giggle..

I am beginning to think this thread has gone to where it no longer serve it need.
Lately, only about 10% of the discussion is related to the real and actual purpose.
At 356 pages... may be it should be closed down... while someone else open whatever thread may be useful.

Hajji M.

-

abdulwastecx:


Your sketch below is more like slab foundation and not raft foundation.

Raft foundation is a formwork of shallow foundation (but not founded on grade). It is in the same family with slated pad, combined footings, trapezoidal footings and cantilever footing. In the case of raft, the floor load intensity ( the load from all the pillars/columns divided by the total area of the building) will make the introduction of individual footings to overlap, hence it now become uneconomical to design individual pad footings, a raft foundation is used.

[b]The raft can an ordinary slab founded [/b]at
a depth of not less than 1.5m in most cases below the ground surface.
Before any bending and share calculations are carried out, the following simple structural calculations are carried out.

1. Estimation of floor load intensity.
2. A trial raft dimensions is chosen; B and L, where B= breath and L= length.
3. This raft is then check for bearing capacity and settlement.
To carried out these check, a soil profile of cpt soil test is sketch showing all the soil profile with the following information, for cohesive soil, we have cu, dry unit weight of soil and saturated until weight, depth of each strata, modulus of elasticity, consolidation parameter etc.

After the bearing capacity has been calculated, the result must not be less than floor load intensity x F. O. D (factor of safety, which is taken as 3 for cohesive soil).

For the settlement estimation, it is divided into two. Initially or immediate settlement and consolidation settlement. This value must also be less than 100mm for cohesive soil.

In summary, a well detail Geotechnical work with good laboratory result and a well structural design raft will not fail throughout it service life

A raft is also a slab as you stated or pasted here!!!!! The pic is posted was for illustration purposes of how the slab can weaken if subject to loads of water as a matter of fact, it demonstrates how the slab/raft can sink unevenly and even break. You are correct. As you rightly stated it is a must to test the type of soil on your building site as this determines the type of foundation to construct. The point of this thread was to highlight the importance of having guttering on buildings be they rental or owner occupied for those that want to ensure the integrity of the structure is not compromised and value of their investment not eroded because of a faulty structure that might be costly to repair.

Jessam:


A raft is also a slab as you stated or pasted here!!!!! The pic is posted was for illustration purposes of how the slab can weaken if subject to loads of water as a matter of fact, it demonstrates how the slab/raft can sink unevenly and even break. You are correct. As you rightly stated it is a must to test the type of soil on your building site as this determines the type of foundation to construct. The point of this thread was to highlight the importance of having guttering on buildings be they rental or owner occupied for those that want to ensure the integrity of the structure is not compromised and value of their investment not eroded because of a faulty structure that might be costly to repair.

The full sentence is '' the raft can also be an ordinary slab founded at a depth of not less than 1.5m in most cases''.

@ agarawu23, where art thou?

#TeamLanicky, I learnt we won yesterday again.

esoorita:


EgunMogaji, I must confess that I adopted 'the siddon look' strategy when you were ardently supporting Brabus against Q1C. I'm sorry to say that I'm personally not sympathetic with Q1C because he was the architect of his own misfortune as far as his dealings with Brabus was concerned. The reason why I believe that Q1C was the architect of his own misfortune was that the handwriting was on the wall as per the untrustworthiness and incompetence of Brabus as a builder. I remembered vividly that Brabus was having a dual altercation with Ahonohai and the owner of Ile-Oluji Chateau on this forum and it was very messy. It was while Brabus was having issues with the two aforementioned clients that QIC arrived from Canada and publicly announced on this forum that he's awarding the building of his house to Brabus irrespective of the fact that he was having a spat with his two previous clients. Why should I waste my sympathy for a guy who is not clever enough to learn from other people's misfortune but chose to add himself to the list of Brabus' victims? I knew there and then that it was all going to end in tears and the tears will be for the guy that parted with his money rather than the recipient.
Brabus was on my radar when I wanted to build my house in Mayfair Gardens Estate Awoyaya-Lekki but I was lucky to witness the spat between him and his clients and that made me to regard him as a pariah not to be touched with a barge pole. Brabus is very savvy and flawless with presentation but his nemesis is that he believes that he can take on his dissatisfied customers that ventures to complain about his shortcomings. This attitude of his is the reason why he's made enemies ten times more than the nearest dodgy builders on Nairaland. He lacks customer service doctrine and he doesn't believe in the mantra that 'the customer is always right'
One other problem with him is that he's too vocal and believes he has a sacred duty to participate in every discussion on the forum and that singular act depicts him as somebody who is not focused. I would have thought he would borrow a leaf from the other seasoned builders like Spyder, Segccymoor, Abdulwastec, Aventures, Segzy14 and others who spend most of their time doing their job rather than getting bogged down with getting involved and displaying arrogance of knowledge in every discussion taking place on the forum with unverifiable claims and images which is often disputed by the owners. I remember a guy on the auto forum by the name Inspired autos who happens to be on the autos section what Brabus is on the property forum but the difference is that Inspired has been banned on the auto forum due to endless complaints by his clients.
I don't know how long the moderators will allow Brabus to get away with his sharp practices on Nairaland.

When I joined Nairaland I researched builders and two things quickly happened.

First, the system that most builders in Nigeria use wasn't palatable to me. Not that anything is wrong with it but I am used to working directly with the actual bricklayer/foreman who is onsite with his guys and getting things done. ADmitedly though for my system to work then the entire funds for the build has to be on hand and in an escrow account. I was never going to hand N30 million to any Nigerian directly like that.

Second, I also learned who the players were. The top Dogs, the up comers and those that we call "Big Hat, No Cattle" in Texas. They have the biggest cowboy hat but only 10 heads of cattle.

I read the archives back to 2011 as I'm a research person.

Yes, I was not as sympathetic as I should have been to QC1 because my faulty premise was that, if I, a total newbie, figured Brabus out for the sham that he really is and the ponzi scheme that he was running then certainly QC1 should have figured it out too. I've apologized to QC1 and he has accepted my apologies.

My take away is that we have to be our brothers keeper.

As for Inspired, I was here too. We'll see how this plays out with the mods. Certainly, Brabus has committed enough atrocities that any decent human being will self-reflect but egomaniacs like him are incapable of doing that.

[size=18pt]Big hat, no cattle[/size]
Someone who presents themselves as a person of great importance, but who's actual credentials are spurious or questionable......#urbandictionary

[size=18pt]
Big hat, no cattle[/size]

(US, idiomatic) Full of big talk but lacking action, power, or substance; pretentious....wiktionary.com

3strikes:
[size=18pt]Big hat, no cattle[/size]
Someone who presents themselves as a person of great importance, but who's actual credentials are spurious or questionable......#urbandictionary

[size=18pt]
Big hat, no cattle[/size]

(US, idiomatic) Full of big talk but lacking action, power, or substance; pretentious....wiktionary.com

Okay, 3Strikes, officially I cannot read your posts at work anymore because I bust out laughing

I am beginning to think this thread has gone to where it no longer serve it need.
Lately, only about 10% of the discussion is related to the real and actual purpose.
At 356 pages... may be it should be closed down... while someone else open whatever thread may be useful.

Hajji M.

I have said this before.

Tho i am still wondering when 3strikes and egunmogaji baba became friends cos i could remember vividly when i pleaded with oga strikes and last page to stop picking on egun then. They are back as friends when egun isnt siding brabus. Egun knew the truth but couldnt talk until he had clash with brabus? Just confused . (isnt that what we call hypocrisy?) 3strikes has nothing to share here unless if na brabus mata. Shey na like this we go dey go?...........

Same recycled bullshiit everyday. We are here to learn something knew about construction and catch fun if our Mr Azuh is here

A thread has been created by oga mufu where u can trow punch lines and insult any builder that messed up with u.

Lol I know some will look their phones like tthe pic below "wetin this small 'boy' wan talk " but blv me, I can come with a new moniker with hidden identity to claim "baba alaye" so that ppl will see me in the same level with them.

Let's make peace.



Agarawu

n3xt:
@ agarawu23, where art thou?

#TeamLanicky, I learnt we won yesterday again.

we scaled tru to the final round which will hold on Saturday. The hustle for 50k and a sponsored trip to SPA is real

Your votes and few ppl that voted me really helped.

Tho I will be soliciting for votes from everybody here for the final round and those that wish will vote her.

FreeWorld23:
[b][/b]

I have said this before.

Tho i am still wondering when 3strikes and egunmogaji baba became friends cos i could remember vividly when i pleaded with oga strikes and last page to stop picking on egun then. They are back as friends when egun isnt siding brabus. Egun knew the truth but couldnt talk until he had clash with brabus? Just confused . (isnt that what we call hypocrisy?) 3strikes has nothing to share here unless if na brabus mata. Shey na like this we go dey go?...........

Same recycled bullshiit everyday. We are here to learn something knew about construction and catch fun if our Mr Azuh is here

A thread has been created by oga mufu where u can trow punch lines and insult any builder that messed up with u.

Lol I know some will look their phones like tthe pic below "wetin this small 'boy' wan talk " but blv me, I can come with a new moniker with hidden identity to claim "baba alaye" so that ppl will see me in the same level with them.

Let's make peace.

Agarawu

You're late to the game. This has already been rehashed.

Yes, my behaviour could be termed as hypocritical. I don't really give a rats a$$, I'm not running for public office

EgunMogaji was hypocritical because he wasn't shafted by Brabus so he left him alone. Now we're all in agreement.

Peace is overrated.

EgunMogaji:


You're late to the game. This has already been rehashed.

Yes, my behaviour could be termed as hypocritical. I don't really give a rats a$$, I'm not running for public office

EgunMogaji was hypocritical because he wasn't shafted by Brabus so he left him alone. Now we're all in agreement.

Peace is overrated.

I am not late, the post I quoted was posted 2hours ago

Well, i wont want to talk further cos i want peace.

Btw you already created a thread for him, so the blame and abuse should go there

Lets view this thread and read important info n not the same old shiit.

FreeWorld23:
I am not late, the post I quoted was posted 2hours ago

Well, i wont want to talk further cos i want peace.

Btw you already created a thread for him, so the blame and abuse should go there

Lets view this thread and read important info n not the same old shiit.

Sorry but you, or anyone else for that matter, don't get to decide what I post. Only the Seun and the mods have that authority. What thread I create and where I post are none of your bizwhacks.

I've asked for an ignore user filter since I joined but it hasn't been provided. That would help both of us and a lot of people out.

I don't particularly enjoy reading ridiculous stuff like beauty contests on a house building thread but you won't ever read a complaint from me about that. I can sort the wheat from the chaff.

PS: and you're indeed late on the let's call EgunMogaji a hypocrite bandwagon. Been there, done that weeks ago.

Listen, you're not on my radar, Brabus is, so just let shyte go if you truly want peace.

EgunMogaji:


Sorry but you, or anyone else for that matter, don't get to decide what I post. Only the Se un and the mods have that authority. What thread I create and where I post are none of your bizwhacks.

I've asked for an ignore user filter since I joined but it hasn't been provided. That would help both of us and a lot of people out.

i don't particularly enjoy reading ridiculous stuff like beauty contests on a house building thread but you won't ever read a complaint from me about that. I can sort the wheat from the chaff.

PS: and you're late on the let's call EgunMogaji a hypocrite bandwagon. Been there, done that weeks ago.

should I dig out my post out where I made same statement even before the beauty contest? You made me laugh cos I get your point

Blv me, you are one person I will never type shitt to in this section.

I saw this circle windows on Houzz and I want to see if I can recreate them in my courtyard.

In the Nigerian context, how can I get this done the most straightforward way?

Here I would simply create a circle in a square form with cardboard and pour the concrete, when it sets then I'll have the circle window.

Thanks.

FreeWorld23:
should I dig out my post out where I made same statement even before the beauty contest? You made me laugh cos I get your point

Blv me, you are one person I will never type shitt to in this section.

I don't want to cross you too, respect is reciprocal.

EgunMogaji:


I don't want to cross you too, respect is reciprocal.

you still remain my "godfather" even tho I have been lashed once by your "new friend" 3strikes baba for calling u that.

EgunMogaji:
I saw this circle windows on Houzz and I want to see if I can recreate them in my courtyard.
In the Nigerian context, how can I get this done the most straightforward way?
Here I would simply create a circle in a square form with cardboard and pour the concrete, when it sets then I'll have the circle window.
Thanks.

Go to any Skimanski's thread and ask him there... He has done this few years back and detailed how it was done.. forgot the thread though.

Hajji M.

FreeWorld23:
we scaled tru to the final round which will hold on Saturday. The hustle for 50k and a sponsored trip to SPA is real

Your votes and few ppl that voted me really helped.

Tho I will be soliciting for votes from everybody here for the final round and those that wish will vote her.

Its great you have made us to know sey final naa saturday. This is the last lap and i trust my people here to vote Lanicky on that day. Just ready the chill drinks on saturday night for the victory parri

Concrete Raft Foundations - How They are Constructed, When they Should be Used and the Advantages and Disadvantages of Raft Foundations

Summary: Find out about concrete Raft foundations; find out what they are and when they are typically used. This project will help you to make the decision to use a raft for your footing. We will help you to understand the advantages and disadvantages of using raft foundations.

Raft Foundations
Raft foundations (sometimes known as Mat Foundations) are a large concrete slab which can support a number of columns and walls.

The slab is spread out under the entire building or at least a large part of it which lowers the contact pressure compared to the traditionally used strip or trench footings.

When Are Raft Foundations Used
Rafts are most often used these days when the strata is unstable or (because of this) a normal strip foundation would cover more than 50% of the ground area beneath the building. There are also situations (usually in areas where mining has occurred) where there may be areas of movement in the strata.

They are much more commonly used in the construction of commercial building in the UK than they are for domestic homes, but can be used very successful in both situations. To understand when it is better to use raft foundations, you need to understand how they work.

How Do Raft Foundations Work?
A raft foundation spreads the weight of the building over the whole ground floor area of that building. The raft is laid on a hardcore, or scalping bed and usually thickened at the edges, especially in very poor ground. Rafts are most suitable when the ground is of good load bearing capacity and little work is required to get a solid foundation.

Raft Foundations are built is this following steps:

The soil removed down to correct depth
The foundation bed is then compacted by ramming
Lay reinforcement on spacers over the foundation bed
Pour the concrete over the reinforcement
The foundation may stiffened by ribs or beams built in during construction which will add extra strength and rigidity.

When Raft Foundations Are Used?
A raft foundation is usually preferred under a number of circumstances:

it is used for large loads, which is why they are so common in commercial building which tend to be much larger, and therefore heavier, than domestic homes
The soil has a low bearing capacity so the weight of the building needs to be spread out over a large area to create a stable foundation
The ratio of individual footings to total floor space is high. Typically if the footings would cover over half of the construction area then raft foundation would be used
If the walls of the building are so close that it would cause the individual footings to overlap, then raft foundations should be used
Advantages and Disadvantages of Raft Foundations
Raft foundations tend to be cheaper and quicker to use than traditional footings. There are a number of reasons why this is the case:

The foundation and floor slab is combined, which saves time and materials
Less excavation is required
Other reasons that make raft foundations preferable to footings are due to their engineering benefits. They are ideal for poor ground condition where normal footings would not cope well as they cannot spread the load as effectively.

Related to this is that raft foundations can reduce differential settlement, where settlement occurs at different rates across the ground surface of the building, which reduces cracking and other more serious problems.

The main disadvantage is that they can prone to edge erosion if they are not treated properly. They are not effective is the load of the building is going to be focused on a single point, although this is rare in domestic construction, so this isn't generally of concern.

READ IT AND FELT LIKE SHARING, AFTER ALL NO KNOWLEDGE IS LOST.....BABALOSE

FreeWorld23:
you still remain my "godfather" even tho I have been lashed once by your "new friend" 3strikes baba for calling u that.

Godfather ke?

Emi omo kekere ara mi. Awon Hajj ni yen o.

Omoyi, ma koun ba o

But on a serious note. I hear you and you shouldn't have to wade through shyte to get to information. I get it. Isu eni lomuni towo bepo.

.

msogunro:



Boss, I've seen a property in Ibadan off New Ife road that I will purchase if my lawyer gives it a go ahead.

I want to get an idea of the total cost. Roughly how much did you pay for survey and processing your C of O?

I've fallen in love with the view.

baba ur home boy is in ibadan in case u need a credible engineer to give u the best value for ur money,just contact tevanso builders 08060506857.thanks

esoorita:


EgunMogaji, I must confess that I adopted 'the siddon look' strategy when you were ardently supporting Brabus against Q1C. I'm sorry to say that I'm personally not sympathetic with Q1C because he was the architect of his own misfortune as far as his dealings with Brabus was concerned. The reason why I believe that Q1C was the architect of his own misfortune was that the handwriting was on the wall as per the untrustworthiness and incompetence of Brabus as a builder. I remembered vividly that Brabus was having a dual altercation with Ahonohai and the owner of Ile-Oluji Chateau on this forum and it was very messy. It was while Brabus was having issues with the two aforementioned clients that QIC arrived from Canada and publicly announced on this forum that he's awarding the building of his house to Brabus irrespective of the fact that he was having a spat with his two previous clients. Why should I waste my sympathy for a guy who is not clever enough to learn from other people's misfortune but chose to add himself to the list of Brabus' victims? I knew there and then that it was all going to end in tears and the tears will be for the guy that parted with his money rather than the recipient.
Brabus was on my radar when I wanted to build my house in Mayfair Gardens Estate Awoyaya-Lekki but I was lucky to witness the spat between him and his clients and that made me to regard him as a pariah not to be touched with a barge pole. Brabus is very savvy and flawless with presentation but his nemesis is that he believes that he can take on his dissatisfied customers that ventures to complain about his shortcomings. This attitude of his is the reason why he's made enemies ten times more than the nearest dodgy builders on Nairaland. He lacks customer service doctrine and he doesn't believe in the mantra that 'the customer is always right'
One other problem with him is that he's too vocal and believes he has a sacred duty to participate in every discussion on the forum and that singular act depicts him as somebody who is not focused. I would have thought he would borrow a leaf from the other seasoned builders like Spyder, Segccymoor, Abdulwastec, Aventures, Segzy14 and others who spend most of their time doing their job rather than getting bogged down with getting involved and displaying arrogance of knowledge in every discussion taking place on the forum with unverifiable claims and images which is often disputed by the owners. I remember a guy on the auto forum by the name Inspired autos who happens to be on the autos section what Brabus is on the property forum but the difference is that Inspired has been banned on the auto forum due to endless complaints by his clients.
I don't know how long the moderators will allow Brabus to get away with his sharp practices on Nairaland.

You may be right. I blame myself for hiring Brabus too. However, I didn't see the altacations between brabus and his other clinet before I arrived in Nigeria. I saw it the next day I arrived. By this time, I've transfered a large sum of money from my account in Canada to Nigerian already. Moreover, I've been granted leave of absence at my job for 3 months. So I have no choice but to continue with the build. I don't have to hire brabus, I could have hire other able builders on this forum.


I gave brabrus a second chance and I will live to regret it for the rest of my life!


You don't have to feel sorry for me. I look to God of which is where my help is going to come from. I pray that I get a second chance when I mess up one day because I know I'm far from perfect although I remain humble.


I'm just surprised how the management of this forum let this continue to happen.

Qc1:



You may be right. I blame myself for hiring Brabus too. However, I didn't see the altacations between brabus and his other clinet before I arrived in Nigeria. I saw it the next day I arrived. By this time, I've transfered a large sum of money from my account in Canada to Nigerian already. Moreover, I've been granted leave of absence at my job for 3 months. So I have no choice but to continue with the build. I don't have to hire brabus, I could have hire other able builders on this forum.


I gave brabrus a second chance and I will live to regret it for the rest of my life!


You don't have to feel sorry for me. I look to God of which is where my help is going to come from. I pray that I get a second chance when I mess up one day because I know I'm far from perfect although I remain humble.


I'm just surprised how the management of this forum let this continue to happen.

Hmnn. I feel ur pain.......

mufutau55:


Scan for my post on this thread... the place I recently got mine is posted with their info. I got Metcoppo from them though, but they also have Longspan.

Hajji M.

What color is your Metcoppo?