₦airaland Forum

FastShipping:
@ abdulwastecx

Got your mail and replied.

Thank you.

thank you sir

lastpage:
True talk Bro!
When we hang iron trusses the way l see it in that picture by @diordaves, it has to be based on serious Engineering calculations relating to "Moments and Forces" (Physiscs!) and any faulty calculations may result in the forces tilting in unexpected direction, with unintended consequences.

We are waiting and watching what they would tell us, if there is no cover-up.




Lastpage!

You are absolutely right about the statement above....

People get away with lots of poor construction when using reinforced concrete because moment/force can easily be transfer, the span of the members are not that large, structural configuration not that critical but when it comes to steel structures, any poor handling of materials, lack of proper engineering judgement of type of connection, poor assumptions of quality of materials will have serious detrimental effects.

The church structure failure may be due to poor choice of section( may be instead of using equal angle the engineer decide to use Hollow section ), assuming higher steel grade than the one use for the structures, undervalue of the intended dead load of the structure, undervalued of the prevailing life load (expecially wind load), not taking into consideration the vibration due to Christian shouting and dancing inside the auditorium....

So many factors can go wrong in such a situation, that is why even the best and most experienced structural engineers have problem with steel design in this our clime

erico2k2:
I heard the contractor is going to be arrested, order from the state governor.

The contractor should not shoulder all the blame.
For a project of that magnitude, there should be the structural engineers that design the steel structure,

A consultant engineer that check if the design is adequate to carry the intended load,

A material engineer that check if the materials meet up to the mechanical and chemical properties specify by the designer.

A competent team of the contractor to build/fabricate the truss based on the design and under strict supervision of the consultant.

wanaj0:
Is resonance/vibrations taking into consideration in designs in Nigeria?

Yes, resonance/vibration are taking into consideration for structures use for factory, religious center, concert all, building closer to heavy traffic road or rail road.

diordaves:
I just saw these dramatic pix of the recent church collapse........if these are true especially the metal contraption; I can't see the column support for the long span or load bearing walls. Is it just me or these don't comply to safe construction principles. Was it an accident waiting to happen from the word go? And the angle (grade) of the beams.......are the beams (span) not too "flat" ? Questions need to be asked and answered.

from the pictures i have seen so far, i think the following things may be responsible
1. the section of the truss member may not be adequate for the intended load that the roof will carry
2. the center connection where all the steel truss may not be properly design

lastpage:
True talk Bro!
When we hang iron trusses the way l see it in that picture by @diordaves, it has to be based on serious Engineering calculations relating to "Moments and Forces" (Physiscs!) and any faulty calculations may result in the forces tilting in unexpected direction, with unintended consequences.

We are waiting and watching what they would tell us, if there is no cover-up.




Lastpage!

steel structure design and construction is a serious business because of the intricate nature of connections, moment transfers, and capacity of steel structural members.

structure can even collapsed when all the load acting on the member are properly calculated, allowed for and all the corresponding moment shear force, axial force, twisting moment, deflection and all other factors are considered and properly allowed for.

KolaShangOne:
True.
According to the pictures, the columns I can see are 150mmx150mm instead of the usual 225x225mm or 225x300mm.. But if the loads are calculated well enough, and enough structural members are put in place to compensate, there should be no problems..

@QC1 Nagode sir..

@Ericko2k2 it's quite remarkable that your foundation block wall is 5-6 blocks high and didnt experience any stress / cracking while filling with Laterite.

@mufutau55 Hajj, well done sir..

And to all my Ogas @spyder880 @fastshipping @lastpage @3strikes @back2sender @ericko2k2 @jossy26 @segcymoor I guess this is welcome back!

The problem with having a very thin column 150 x 150mm is slenderness which may developed as a result of the section.

The best bet when building using 6'' solid block is to flat the block out, instead of 6''x 9'' 18'' we can have 9'' x 6'' 18''*where the thickness is replaced with 9''

twinskenny:
So am installing cctv on this building in ibadan.. And was told by the old man who happens to be the architect that hollow block was used as decking.. Surprisingly it was so... How did they achieve that?


Meanwhile the house was built in 1978 or there about still standing strong

Using hollow block for decking is not remarkable.... The '' hollow block '' there is not the load carrying member of the decking but a concrete volume reducer.

The major structural member carrying all the load there is the '' rib beam'' a small strip of beam running perpendicular to the hollow block layers,

Such slab/decking is called ribbed slab (when rib is provided only one way) or waffle slab (when rib is provided both ways)

Here is a similar method of slab construction but this time the hollow block is replaced with a polystyrene

erico2k2:
Just a quick one, I did use 6 Inch Solid for my build though foundation and downstairs and after decking I'm using 6 inches hollow to reduce weight upstairs.

Good one, though it frightened me to see a six inch block been used for a building carrying a suspended floor because the columns and beam that will carry the suspended floor may not have adequate width to withstand the load that will be coming from slab.

Though, since the load have been determined an estimated by the engineer that design the building, I am confident the wall together with the columns can carry the house.

Truthinlife:
I wouldn't know if this question have lbeen asked before, so pardon me.
I believe it's a general practice to use 6 inch solid block in fencing our homes; is there any risk or harm if I use same 6 inch solid to build a two or three bedroom bungalow house as against using 6 inch hollow. Pls don't chastise me, it's an innocent question.

There is no harm or risk using either 6 inch hollow or solid to build a Bungalow but the same can't be said for a duplex reasons been that the sizing of structural members like beam and column will not be effective.

Building with 6'' solid is ideal for bungalows because it can easily carry the light roof load that the building will carry expecially when such house is been built on a land with good engineering properties.

FastShipping:
Do you get allocation immediately or have to wait? I got someone to check it out. I should be calling them on Monday myself.

I don't know that yet but I will ask around

3strikes:
Whats the proximity to abuja airport?

I will check that out when I get to Abuja tomorrow, I am currently in lagos.

FastShipping:
Nassarawa is an option as long as it is in a very good location in close proximity to Abuja. The distance must not be more than 35 minutes drive from Abuja metropolis. It must have tarred road and other basic amenities to compensate for not being in Abuja. You know if you can get me the land, you are automatically building it. I'm not going to buy piece of land in Nassarawa without having those things I listed.

I was told that the estate have a flexible payment plan, where you pay 1.2m outritely and pay 1.8m within 12months, making a total of 4m per plot

FastShipping:
Nassarawa is an option as long as it is in a very good location in close proximity to Abuja. The distance must not be more than 35 minutes drive from Abuja metropolis. It must have tarred road and other basic amenities to compensate for not being in Abuja. You know if you can get me the land, you are automatically building it. I'm not going to buy piece of land in Nassarawa without having those things I listed.

More pictures from the estate

FastShipping:
Nassarawa is an option as long as it is in a very good location in close proximity to Abuja. The distance must not be more than 35 minutes drive from Abuja metropolis. It must have tarred road and other basic amenities to compensate for not being in Abuja. You know if you can get me the land, you are automatically building it. I'm not going to buy piece of land in Nassarawa without having those things I listed.

Check out this estate : Manhattan garden estate, along Abuja - Nassarawa road
About 30munites drive from city center.

Here are some pictures obtained from their Facebook page by a Nairalander who bought some plots in the estate.

disclaimer : I am not an agent, all the information provided here were giving to me by a Nairalander who bought some plot in the estate.

FastShipping:
I lived in Abuja for about seven years. It is a nice place. No pile or raft foundation or Omo onile. But you must do due diligent before you buy land there.

Abuja is a great place, there are satellite springing up in neighboring state like Nassarawa and niger state where land is relatively cheap and return for rent is relatively okay

3strikes:
Am beginning to eye Abuja because it seems like a more saner environment and beside I wont have to be doing yeye raft or pile foundation with money that can build me carcass for Abuja. I dont think Abuja have omo onile issues like lagos....anyone know?

Abuja is a good place to invest.
No omo onile, the soil is relatively good, hence no need to for raft, some raw materials like gravel are cheaper..... And return for investment is great

kkenyz:
Sir abdulwatecx... pls by how many mm did u offset from the original points

1200mm

mavverick:
Ahh Got you.
So those people that sell foundation, is it that one cannot do his/her own foundation and what you get is land + foundation then you come in and do your block work then finish it off ?

It appears one has to do duplex for that kind of place, not anything you like.

Something like that, they have their own design for the estate, when you buy the foundation you then build in accordance to the design

mavverick:
I must hold my hands up, the 2m quoted was just a finger in the air figure, i do not know anything about Abuja properties, my point was just that if these lands were that cheap, not a lot of people would be renting and i have heard that renting is typically a good investment in Abuja, how true I dont know, it just seems to be a general consensus.

Actually I am not into land property, I got all the figure from a friend who is a land agent along that axis. Land is very expensive within the city and even satellite town like kubwa and gwarinpa, that is why people are moving away to neighboring state like nasarawa and niger state for cheap land.

mavverick:
BROS

all these Abuja property bonanza, it sounds really good but i hope not too good to be true. below is my thinking, if land for kubwa cost 2m or how much you guys have been quoting, who will want to rent and pay 800k ?

Also, how far is Kubwa from central Abuja and is the road good ?

Land in kubwa is very expensive o, I don't think you can get a 2m land in kubwa. I was talking about suleja.

Kubwa is not that far from the city center, say 20-30minitues drive.

I know of land along Arab contractor road and half a plot is 15m upward.

One can also buy foundation for duplex inside urban shelter brick city for 5m (though, that depend on the size of the duplex)

solistic:
@Abdulwastecx: Please how much is 2 bedroom and 3 bedroom flats going for in that area if one has investment in mind? Thanks

I am too conversant with rent in that area.

But places like suleja where 2bedroom goes for N250-N300k, kubwa for N800K UPWARD.

land is relatively cheap in suleja... A plot can goes for 1.5m in very good area

FastShipping:
I know this area very well during the my time there in the late 90s. Like how much are we talking about for a plot of land meant for a duplex?

Around 5 to 6m

FastShipping:
Where can one get cheap land within Abuja at the moment?

There is a place called '' ushafa'' along dutse - bwari road where you can get relatively cheap land

Aventures:
OP please find another name for the foundation you are constructing. this is not a raft foundation. mere fact that you have a ground beam here does not make this a raft fdn. A raft foundation is type where you have your ground slab and the beam reinforced and in monolithic condition. This type of foundation is absolutely good for bungalow only in a water logged area where you there is tendency for the use of blocks at fdn may be weaken by the water. Well i believe you are acting based on your structural engr design but honestly absolutely wrong, if i have to explain this then i will have to write an epistle, but kindly check previous thread of segcymoore, kkonsult, brabus and other to see what is called raft foundation.

At the bolded is the whole idea of raft foundation.
Though, Raft may be a an inverted flat slab, waffle or rib slab, slab with thickened end, slab with downstand or up stand beam, cellulose raft ( where depth of excavation is use to neutralized the building load. Etc.

All the raft built here don't have monolithic beam slab construction including the one use by you and the builders you mentioned above, but that doesn't render the raft useless or unsafe to carry the intended load provided that proper sand replacement, compaction of the filled materials and good type of filled materials are used.

gabbytabby:
Congratulations and please do a thorough review of the topography. Na all of us they join build am. no pressure.

Qc1 agun wa oni jasasan.

Thank you ma.... We will surely look at all the before we start construction. We are still at preliminary stage of soil test and building

FastShipping:
Where can one get cheap land within Abuja at the moment?

By cheap land sir, how much are you looking at?

Daboomb:
Good one!

@Abdulwastecx, i have not known you to fall hand and l have no doubt you wont on this one.
Work closely with your Client, let him come back and tell us he is more than satisfied.
His last experience was very bad and l am eager that this will be the proverbial "ile-Oba to'jona", you know what l mean.

Anyway, we will follow you block-by-block and we go shout if need be.

Qc-1, more grease to your elbow, the devil is a liar.

I will surely heed to your ideas sir....
Thank you for your input sir, I will make sure that the work will go on as plan.

NL1960:
Good one and a good choice. I have followed this guy on his projects here and have been impressed.

@Abdulwastecx. Please do not disappoint us on this project. You need to make Sir QC1 to smile again knowing what he has passed through.

You can count on me boss... I will do my best not to disappoint you my boss.

I using this medium to thanks you all my fathers, boss and my brother here supporting us. I thank you all

Qc1:
Update.


Abdulwastecx got the job!

Thanks everyone.

Thank you sir for giving us the opportunity to work on your project, we will make sure to deliver a very good job