₦airaland Forum

nigeriancuban:
its not necessary my friend,its a bungalow remember and a residential building,its not like they are gonna put a load of 100tons in it,lol...but I feel you,some requires reinforcement but not this.....

My friend it is very necessary to reinforced your slab if you intend to build a raft /mat foundation.

People don't really understand that the slab is the most important element in a raft foundation.

If he had use another type of foundation like wide strip, reinforced strip or isolated pad footings for his foundation, I may agree with you that reinforcement is not necessary.

What is mat or raft foundation?
How does this type of foundation transmit load to the soil beneath the foundation?
Why do we do raft foundation?
Why do most raft done properly in advanced countries or even India comes with a basement?

The simple answer is raft/mat is shallow foundation which is like the normal pad but this time around spread across all the wall or columns to spread the load uniformly over a large area due to factors like high loading intensity, settlement problem and low bearing capacity

butterflex:
Brilliant. will be contacting you as soon as my architect is done with my drawing

Thanks sir

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gabbytabby:
I can see you do plaster before the ceiling should this not be done after.

Maybe you wanted to say ' we do plastering before noggin'?

When I use pop for my ceiling I don't really do noging because I hanged my pop to the roof truss directly for rigidity and to safe cost.
Noggin is not that necessary for pop work because the pop people will get a different level and only need to attached the pop to wood using binding wires

Derguss:
Can you please educate us on how you were able to remove the stairs without unnecessary damage to the building. Do you use chemical agents for removal of concrete stairs and are they available in Nigeria? I quite like your work and the detailed explanation attached. Welldone and keep up the good work.

We were a bit lucky that we have the stair directly supported by a beam at each end of the run. These beams run perpendicular to the longitudinal axis of the stair, this enable removal by chieselin possible.

A great deal of energy was put into the stair to get it removed manually using very big sledge hammer by three able man. The vibration from such activity was minimal on the building because of the beam the stair is resting on.
I will get some pictures and sketches to explain better.

The stair was removed due to some reason listed below.
1.very thin waist , the waist of the stair was too thin to support high traffic of such nature. Initially before removal of stair, the waist was around 75mm while the new constructed stair have a waist of 175mm from ground to first land and 200mm from first landing to the top landing

2uneven risers and thread: the size of riser and thread varies from places to places, from architectural consideration it make it possible to get injured easily and difficult to navigate. The new stair has a riser of 150mm(6''), thread of 300mm ( 12''or One foot) this make it possible for elderly people to use it very conveniently.

3. half of the stair was a ramp, which make movement impossible. Prior to the commencement of the repair job the front staircase wasn't put into use because of this ramp. We needed to get into uniform and all into a workable means of accessing the building upper floor

butterflex:
Good day Sir. please what is the cost of roofing and how many bags of cement did you use for the plastering and can you and your team work in Benin. i anticipate your kind reply. thanks.

butterflex
goodness.obayangbon@outlook.com

We will love to work for you sir

skytech2020:
Y are u using 1:4:4 instead of the standard mix design of 1:2:4

We have standard mix for different strength categories such as M10, M15, M20, M25 etc.
These design have been produce using some standard method of mix proportioning
M10 - 1:3:6 (by weight)
M15- 1:2:4 (by weight)
M20- 1:1.5:3 (by weight)
M25- 1: 1:2 ( by weight)

note M is the means, while the number is the strength of the concrete after 28days.
According to 'IS 456-2000'

Second type of concrete is nominal concrete where the concrete producer uses relative mass of the cement and aggregate to batch concrete, this is normally use for small job like the building I am building here.
The major problem is you get mix that is either too rich or too poor in concrete.

Third type of concrete is a called 'design mix. This is a type of concrete where the proportion of aggregate and cement is specified by the designer after considering some of the property of the concrete sure as strength, workability, durability etc. This is normally use for job where strength of more than M30 is required.

We decided to use 1:4:4 for most of our max concrete because we only need about M10 strength for the bungalow

asaju10:
4 masons for how many days pls?

Three to four days

gabbytabby:
I can see you do plaster before the ceiling should this not be done after.

We are going to use pop ceiling

whymaney:
I will like to get the phone number of you guys

That will be great

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richardquest:
Your bricklayers are they Cotonou boys, i must confess there job is sooooooooooooooo neat.

That is a general misconception my oga... I am a nationalistic person and use Nigerians for my work.
They are yorubas bricklayer from Abuja, they are my Abuja team of bricklayers.

In fact next year we will start a small vocational training center to train our artisans on what we really want

More updates

Installation of our casement Windows and window dressing

austin2all:
Pls sir, can you show us the floor plan of this project. Thanks

I will do that my oga

austin2all:
I'll be grateful if you can also drop a floor plan for a 3 units of this kind of structure (2 bedroom flats) with adequate consideration of a proper ventilation if the middle flat.
Thanks in advance sir.

It will cost you my oga.... Lol

emmylucky:
am plumber which side of d ogidi d building reside?am also from ogidi.

Let me ask the building owner if he will entertain such a guess

diordaves:
Why reinforce the German Floor with Iron Rod? It's a Bungalow and any such reinforcement may be an "over-built". The current DPC may spread the superstructure load as required and adequately.

It's not really about over reinforcement, when you build raft you need to reinforced the dpc

EgunMogaji:
Over here, the rough areas would have been grounded down to save time and money but this look like a money be damned project

I think we consider all possible options and the money spent on the entire outside plaster was still very reasonable considering the nature of the work.

Option one : use filling machine to smoothing the wall and then apply Portland cement screed to the surface to make it smoother.
Problem with option includes.
1. Building surface was very uneven, at some point we have more than 25mm variations between the bottom of ground floor and top of first floor
2. We opened up too many Windows, and most of the first and ground floor windows were not properly aligned , we have to align them and that leads to too much opening that need to be covered.
3. We added two additional block work plus head course. These needed to be plastered and patching up the building will not do any help
4. The outside paint looks too old and the plastered layer had sock a lot of water during wet season and the plastering look too week.

Considering all the above stated point we realized that a new plaster when properly done and adequately monitored will be cost effective, safe us a lot of future stress and truly make our building modern.

Here is the breakdown of materials and workmanship for outside plastering
1. Plaster 7 trips of 10 tonnage at the rate of N15,000 each
2. Sharp sand 2 trips of 10tonnage tipper at the rate of N12,000/trip
3. Cement about 128 bags using a mix of 1:1:4
4. Workmanship was a bit complicated due to the nature of the job
Total number of partitions = 102,
Mason do two partitions a day
I increase their daily to pay from N3,500 to N4000 in other to increase speed and get a very good job. They were very happy and do whatever I commanded them to do

johnson232:
my engr. is the removal of the existing plastering work actually necessary?
we discussed about tonnage for sand the last time.
but most suppliers would argue there is no tonnage for sand, they use tyres, am confused.

nice work, very neat and perfect, i must confess....

Thank sir for the positive compliment.

The basic truth lies in the dimensions of the vehicle.
Next time they deliver with any of the vehicle, be it 6 tires or 10 tires, please follow these simple procedure
1.get your measuring tape
2.get the length of the bucket (the part of the vehicle carrying the sand)
3.get the height and the width

Make L= length, W= width, and H=, height

Get the volume of the bucket, V = LWH
The tonnage = V x density of sand in tonnes
= V x 1.6

EgunMogaji:
Okay duly noted.

So I'll just be paying based on the tonnage listed on the waybill henceforth.

Thanks for the explanation.

Love the work that you guys are doing.

Confused as to why you removed the wall plastering though.

The house was built some twenty years ago with a lot of finishes problems such as
1. uneven wall surface
2. Old and unattractive wall paints
3.The windows are not aligned
4.The head room a not adequate
5. The wall surface too smooth and cant hold any layer of plaster

In other to modernized the building, we need to remove the wall plastering for a new layer.

2.

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EgunMogaji:
The bad apple has caused doubts in that industry.

One question, when you order 30 tons, should you expect 30 exact tons or is 29 close enough?

In my business, a pint of blood is a pint of blood, if you get 45 milligrams of pain killer instead of 55 milligram during a c section it won't be appreciated

It is always difficult to get your tonnage right when it comes to sand and gravel due to the following
1. Most of the vehicle used cant carry a load weighing 30tonnes
2.At the quarry, a well graded weighing balance is not used to get the actual weight of these materials

EgunMogaji:
Please show more pictures of your external plumbings as you go along.

I will do that sir