₦airaland Forum

EgunMogaji:
Or what you are using temporarily until the spiral staircase is ready or can be afforded.
This person has completed what many on here haven't been able to, his own roof over his head.

That is not the issue. What is wrong is wrong even if the ultimate aim is an achievement. So if he falls from the ladder one morning when he wants to rush to work, will having a house save his neck?

When you give a Quack your building Project to build

Example of building done without the right Professionals.

micgray100:
Nice work you guys are doing here... I hope I am welcome to this forum.. It is actually the field I specialize.. I am a structural engineer by profession.. Engr A.L Onakomaya MNSE.. I will be glad to share my knowledge with you guys... Cheers..

Highly welcome Bro.
Monitor the thread from time to time to help answer some questions from sincere Nigerians here.

snakebeat:
But sir won't this detract from the bonding of the concrete? Cc: opalu

If it is a Ground floor slab of a simple building, it has to be Monolithic. Meaning the floor has to act as a single entity.
But if the span is becoming too large to the point that it will react to Extreme weather conditions, then expansion/construction joints have to be introduced as shown in picture above.
It is the same principle used in Filling station slabs as well as Bridge decks

snakebeat:
No sir, 1bag, 3headpan of sand, 6hpan of gravel or granite...
But u multiply the fine & coarse agg. By 2 when working on site..
Thanks.

Why it is multiplied by 2 is because one bag of cement is made up of 2 head pans.
So when you have a mix ratio of 1:2:4 , if you pour 1 bag (which is 2 head pans) of cement into the Conc Mixer, then u have to pour 4 head pans of Sharp sand and 8 head pans of granite.

Similar do to 1:3:6

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TO DELIVER 20 MILLION HOUSES BY YEAR 2020


^{All things Are Possible}!

omusiliyu:
Wetin concern Sambo Dansuki then?

Abi Na him send them??

@Topic
The man is not even a shame to say he is now broke after being in diverse positions in Nigeria and in FIFA

Ok we await the diagram.

On seismic movements like I said, Nigeria is not subjected to earthquakes so we don't factor that into our structural designs. Sincerely I haven't done any structural design against earthquakes yet. If your project is located in such areas, please do consult Engineers with such specialisation. Thanks.

However if the movements you refer to is settlement of building foundation, then I am an Expert in such. All you need is a foundation design based on reliable soil examination

EgunMogaji:
For sure I will do a soil test by a competent soil analyst so I understand that answers to my questions will be majorly reliant on that. But I will only be on the ground for two weeks at a time and will not allow any work to be carried out in my absence. Mine will probably be the longest bungalow build on Nairaland but I am okay with that. That's the only way I know to guarantee the exacting quality that I demand.

On one of my previous homes here in SoCal, they simply built the foundation perimeter in poured concrete (the consistency I do not know but the house was built in the 70's and were still standing in 2015). So they built the perimeter in concrete, then raised the walls in 2X6 wood. The roof is a truss system which has required no support from the inside of the house. Basically there were no load bearing walls in the inside whatsoever.

The floors were wood flooring laid on top of 2X6 that were hung off of the concrete perimeter.

So you ended up having a small crawl space of about 3 feet. More than enough for a plumber and electrician to get down there and do their thing.

Any thoughts on this being viable in Nigeria? I mean I would have to use concrete runners instead of 2X6.

Another question. What is stopping a german floor from moving laterally on the block foundation in the event of seismic movement?

Thanks.

I didn't get the upper part. May be some else can help. Or explain better.

On the second question, seismic movements you refer to is not common in Nigeria. As for the Ground floor on block foundation, that works for bungalows not storey buildings with heavier weight. Do attach pictures to explain better thanks.

snakebeat:
German floor! Use hardcore & wiremesh for the reinforcement, that will do...

Wire mesh on hardcore is not gbogbonishe that works for every German floor.
Fair enough, i stated earlier that When hardcore is properly rammed, the ground floor slab will not require major reinforcement. However, there are many structural corrections I have had to do for clients whose projects were done with wire mesh when it actually required Y12 .
What works on one site might not necessarily work elsewhere.

snakebeat:
Prof.
@ the emboldened, u were, honestly...

EgunMogaji:
Totally spot on. I'll make my decision after the soil test.
Mucho gracias.

Same message. Opposite observations.
Beauty in diversity.

Load mechanism on a Structure

EgunMogaji:
Totally spot on. I'll make my decision after the soil test.
Mucho gracias.

Thanks bro. The pleasure is mine

USarmy:
Dull@rd Na Todayyy

Did you see a tall man chasing you with broom at night?
Take it easy. Life is not always that hard

Hmmm

Great write up. My ground mum was IGBO from Enugu.

Why I asked about hardcore is that anywhere it is used and well rammed, the 'German floor' will not require major reinforcement. And if the test shows a soil of very high bearing capacity, plus if the panelling of the floor is not critical, then mass concrete will be just fine.
See that I spelt out the conditions. So that many people won't go and use mass concrete for ground floor where reinforcement is required and then experience structural failure.
Generally the ground floor is subjected to upward forces from the earth as well as downward forces from the dead and imposed loads from top. And you know the law that says actions and reactions are equal and opposite. That is equilibrium state.

Reinforcement helps make this possible in most (not all) buildings. Rebar caters for tensile forces while concrete takes care of compressive forces.

Hope I have not been too theoritical on this.

EgunMogaji:
Greetings.

I'm self designing a modest 2,500 square foot single level building.

For the DPC, do I need any steel reinforcements in the slab?

Thanks.

It depends. Which state and how 'good' is the land?
Also are you using hardcore to fill or just filling sand?

Mapletraks:
^^^^^^^^^
@Opalu

Thanks for this brilliant reply to my earlier
post. You are a TRUE professional and
any of your clients/future clients need not
fear because they are in safe hands and will
get their housing projects delivered as and
when due.

I will keep in touch with Daystar Shelter soon
for a personal housing project in Nigeria.

Thanks again.

Thanks alot. I look forward to doing a Housing Estate with/for you! Because I strongly believe you can do an estate than just a house.

State the property and you may even see a buyer here

snakebeat:
Nice job prof... Prof., can the ratio of sand be more than that of stones when mixing concrete? I thought we have more stones in concrete than sand...

The proportion of Granite is normally more than that of Sharp sand. But there are instances that some Engineers and Builders recommend equal proportions.

[size=16pt]Daystar Shelter Ltd
[/size]we house the world, we build peace of mind!

Mapletraks:
^^^^^^^^
@Opalu

This is a GREAT, straight-to-the-point
post/thread YOU have here.

On the other hand, I have a quick question,
with the constant flooding of some highbrow
estates in the Ajah/Lekki axis such as VGC,
during the rainy seasons, what is the medium
to long-term effect of this on the structure
of the gated estate buildings if NOT resolved
on time?

Thanks again for the illuminating info on
this thread.

Buildings and their foundatons can be designed to perpetually remain in water. The truth is that good concrete mix without void and with great protection can last in water for God-knows-when. A smart Engr will assume the worst case scenario in which the foundation of the Lekki building remains in water.
Truth is that there is little a house owner or professional can do to totally remove underground water. However proper drainage must be done to eliminate surface flooding and retention of water around the building for too long since most buildings in the highbrow estates were done without making allowance for the said 'worst case scenario '.

Terrible

Let justice be done in all its ramifications.
Nigeria must Nyogba (progress).

Elsewhere in Lekki, Low cost housing has arrived at last!

I love this

Real men speak the truth square and blank

I don't know why, but I have so profound respect for this woman Oby.


MEANWHILE LOWCOST HOUSING HAS FINALLY COME TO LEKKI AT LAST!!

I find it seriously surprising why people who sell houses and lands find it hard to openly say the prices!!!
Is it different prices for different people? Or it is shameful to mention

Hmm