₦airaland Forum

2B. Digging: Foundation depth depends on site/road level, water level, nature of soil etc and are part of the structural drawings by the Civil Engineer, but since we do not have a structural design; we would adopt a foundation depth of 750mm (it could range from 600mm to 1200mm thou).

The attached structure would cost you about N50000 to dig; with four (4) quality hands digging, you should have it completed in 2 days. but unlike in the bungalow, we'll have to dig further down at the column points. i.e if I'm digging 750mm for my foundation depth, I'll need to dig +150mm (900mm) for the column base. (NOTE: We're working with assumptions because we do not have a structural design for this tutorial - else, follow what your civil engineer specifies)

COST IMPLICATION for Item 2B:
>> Materials Cost;
You might be requested to rent diggers, shovels etc  and buy drinking water for the workers - N2000

>> Labour Cost - N50000

Summary: (Material + Labour Cost) = N52,000:00k

2C. Rebar Works: Rebar simply means reinforcement or what we can iron. Since we didn't discuss this in any of the previous tutorials, we would be going into details. Attached below is a sketch of the structural design for column we would be adopting.

Our first task is to calculate the amount of rebar needed and also explain few principles to consider when cutting your iron (rebars).
- Overlap length - Because it is impossible to cut the total length of rebar needed from foundation to roof beam level at once, we normally join iron (not weld, as some people do), the overlap is the distance that the new iron seats into the existing iron, to allow us bind (tie) them together, and this varies according to the size of the iron. see chart below for an example of overlap lengths.

- Cutting length - This is the length of iron that is cut out to form the different structural members eg no1, if the height of my foundation is 900mm, my cutting length must put into consideration the overlap length and the foundation depth and a few other parameters. eg no2, if I want to bend a ring of 150mm square, my cutting length is 150+150+150+150+100 where 100mm is to allow me close the ring properly hence my cutting length is 700mm. Your iron bender is required to cut the reinforcement bars of the example above in short pieces of 700mm each.

- Matt - As the name implies, this is the footing on which the starter column bars are placed on, it's work is to prevent the iron from sinking into the ground/foundation when loaded i.e when it carries load because the iron usually has a sharp end. it is the matt that the column bars seats on.

- Starter Columns - This is the first part of the columns that are cast; it starts from the foundation base and ends just after the ground floor slab (German floor) - The starter column MUST not terminate in the German floor, instead it should project above it with adequate distance as recommended in the overlap chart above (so we can join the continuation columns to it.

Let's go practical 'abeg; this English don dey too much.'

The pictures below are column design from another project.  Lets calculate how much of rebar is needed for this project, starting with what's needed for the foundation only.

No1: Preliminaries:
We treated this in part 2 and the notes made there are still applicable. However, the cost of labour related works has changed over the years. Eg You could pay as much as 10k to 20k to clear a site of bushes and even about 20k or more to cut the trees on it (depending on the numbers of trees).

COST IMPLICATION:
* Clearing and uprooting of trees (N15,000-N30,000)
* Water (find out how much a small tank goes for but it cost about N5,000 to rent & fill a tank of water)
* Omo-onile could charge as much as N50k to 200k depending on your location.

SUMMARY: The cost in this section are dependent on so many factors but with about N100K (MINUS OMO-ONILE fees) you should be good and ready to go.

No2: Works Below Ground
Works in this sections include (but not limited to)
a. Setting Out
b. Digging
c. Rebar Works
d. Blinding and Concrete to Foundation
e. Blockworks to Foundation up-to German Floor
f. Filling / Compaction
g. German floor

2A. Setting Out: I have always advised that (against the normal practice of bricklayers using blocks for setting out) it should be done properly using wood profiles and pegs. We're not here to discuss why, all those have been done in previous post rather we're here to calculate 'How Much' and advice on 'How' best it should be done.

Materials Needed: (Based on the attached design)
1x12 plank = 4pcs with each sliced into 4 each. (this is gotten by finding the perimeter of the building i.e add the length of all 4 sides together; then divide your answer by 3m [length of 1 plank], then further divide by 4 [because each plank would be sliced into 4 each].
Pegs = 3 dozen i.e 36 pieces (Divide the perimeter by 1.5 and approximate to the nearest dozen, since pegs are sold in dozen)
Nails = 2" and 3" - buy about N2000 worth
Ropes = 4 bundles each at about N500

Workmen Needed:
One Bricklayer, One Labour, your Supervisor and a representative of the Diggers (If the foundation digging is not given to the bricklayer) - I'll advice however that the bricklayer should be given the job, so that he can ensure the digging is accurate, aligned and well levelled  at the bottom to avoid wastage of concrete eventually.

NOTE: At this point, because its a storey building, your Iron Bender/Welder should be on site preparing his Matts and Starter Columns. If the site is a small one and cannot accommodate him, he should work offsite and transport to site later. When we get to item C, we would discuss his work in details.
 
COST IMPLICATION for Item 2A:
>> Materials Cost;
Planks: 4 x N1800 = N7200
Cost of Slicing per line = N100 x 3 lines = N300 x 4 planks = N1200
Pegs: 3 dozens x N2000 = N6000
Nails = N2000
Ropes = N2000

>> Labour Cost - N2000 for the Labour, N15000-N20000 for the Supervisor (if paid per visit) and N3500 - N5000 for the Bricklayer (if he's not digging the foundation).

Summary: (Material + Labour Cost) = N45,400:00k (Max)

next is DIGGING OF FOUNDATION (pics attached)

Good-Day,
it's nice to be back and have you (still) around; I hope you find the information below useful (as you did the previous parts).

To make things easy for everyone, I have modified the plan used in previous tutorials by adding a staircase and also showing proposed column points, (because we do not have a structural drawing, we would be working on a few assumptions to aid our calculation.)

New plan attached below (we're not particular about functionality here; just estimation.)

Note: Because it's the same design with Part 2, we would be making references to part 2 occasionally and using that to save us time and post length.

LET'S GET TO WORK.
*My post do not eliminate the need for an experienced supervisor/engineer on site - they are intended for education and negotiating purpose only. Thanks.

If you're yet to read the previous parts, kindly do so here:
Part 1: https://www.nairaland.com/3502464/how-build-comfortable-house-earning 
Part 2: https://www.nairaland.com/3523256/how-build-comfortable-house-earning

As we did in part 2; we would go into details, best working practices, cost implications and then questions & answer i.e we would arrive at an approximate cost of building the attached house (up to decking).

Note: We're treating foundations on solid land using Strip/Pad foundation NOT Raft (maybe in part 4); maybe.

FOLLOW THE THREAD.

Say-d-Fact

ntrukpum:
Hello friends, my daughter is very far ahead of her peers (class mates and outsiders) academically and otherwise. She started school when she was 2yrs. 3wks in school she had already knw how to write 1 to 10, A to F (I mean write not just to read).

Now she is 3yrs and she does things extraordinary. She can write 1 to 200, Aa to Zz without anybody assistance. She does her H/W alone, can read and spell two letter words. She sings a lot. I wanted her to play at least one musical instrument b4 she turns 5.

Two yrs ago, I had this vision of grooming "exceptionally intelligent" kids btw 9-12yrs to study outside their normal school curriculum. I mean a 9yr old kid in JS1 answering physics and advance maths question. Am still working on it. But my child is just 3yrs old and i am begining to be afraid. Married with two kids, an average of 30k monthly income as a private school teacher, I think, I lack the financial resources to push my daughter to where she deserves.

I need proper advice on how to guide her now.

Hi, start by finding a second stream of income - and about the child, just let her live her normal life; don't start putting pressure on her or her brain because you think or it's obvious she's a smart kid.

afterall, she's not 9 yet

@ fawazming:

I tried uploading again on Friday and got banned - I'm just been released lol

In the main time while I try to see a way around it, kindly busy yourself with other post i've written.
Thanks for following also.. regards

fawazming:
@saydfact
Thanks so very much for this educational post. I've been glued to this thread for the past 2 hours, starting from 2016.
Then I know the quote (pricing) are no more relevant in 2021, but the steps and procedures does.

I have been using Nairaland for research and news as far back as 2010 but I don't have a reason to register and that's because of the way most people address each other.

I'm here now, just for you. Expecting the link to part 3, THE DUPLEX DESIGN

I am Fawwaz from Sagamu. Nice meeting you.

Thanks sir... Waoh. I just replied your NL mail b4 seeing this post.

Actually I posted Part 3, 2 weeks back but Nairaland BOT ( Seun pls note) kept banning me. So I left it in my draft.

I'll do everything to post it tomorrow and I'll do that in bits.. Even if it takes 2 or 3 days.

I so so appreciate your kind words. It means more than money to me.

I'm Say-D-Fact

edimalo:
for people who want to know what I went through and how they helped me read my story below.
https://www.nairaland.com/6516871/ikedc-fradulent-overbilling-scam-activities

OAM4J, Mynd44 , lalasticlala help to push this to the front page so that people can plan towards it and help them resolve their pending issues with PHED.
this is just my little way of giving back.

Whats' the link for the Lagos one if you have it.... I've been on my pre-paid meter issues for almost 2 years now.
Thanks.

2018 - 2021

The prices of materials has increased like x4 to x10.

some of the information would still be valid thou, like quantities why prices has changed.....

great work

raindrop99:
@saydfact ur thread is really an eye opener, thank u 4 this..Pls how much will it cost to complete this 2 bedroom house from start to finish. No fancy designs, just moderate finishing.
I just want 2 have an amount in mind to work with even though there will surely be plus or minus later on. Thanks

Even with the simplest of design and material choose - it would go into 5m and more.

Where is it located? Hope its a dry land, if waterlogged add another 2m to that.

SurveyorGeo:
Good evening my ogas in the house .
Saydfact
Chekitaut
Dennis3D
Segzy14 etc.
Hope you all are doing great

Morning Boss man - how is 60 by 120 going? - thanks for the mention.....

My latest article would be going live soon - it's completed, just waiting for the best time to post. regards

overlap

The pictures attached here are not relevant to this post; I used then as links for the Part3 of this tutorials.
available here >> ( https://www.nairaland.com/6808100/part-3-building-comfortable-housing )

okeyfermod:
looking forward to this

Almost done but being Lazy me

mank1234:
Are you Judy1 at https://www.kobocity.com/blog/155-how-to-calculate-materials-needed-for-beam-and-slab-decking-diy

NO, A lot of my post was stolen by KOBOCITY - I complained to the admin but he was reluctant to remove it, so I asked him to leave it there...... afterall, its an info I decided to give out for free

Mykel51:
But when used for ribbed slabs, is it cheaper ?

Hollow pots slab are expected to be cheaper, all things being equal... I'll say Yes

my Twitter app worked today and I didnt install VPN

maybe this is a proof that NIGERIANS ARE POORER now...

koldej:
I'm sorry to disturb you sir/ma, I'm currently in a position I feel I needed a serious advise.
I rounded up my service year, Nov.2020, luckily I was able to secure a job in a construction company jan.2021 although m on probation (1year).
I managed to secure an half plot of land this month somewhere around Ogun state from my little savings(as a result of this I don't have any savings in my acct)
my probation period will be over by dec. With little chance of being retained.
I'm actually planning to rough things through to Dec. again this year so that I can do the foundation of the land(which means I will not be having any savings) with high probability of not being retained.
Is it advisable to do this when m sure I will probably not be retained or I should save to invest in a business?
Still below 26yrs, pls I need ur opinion and suggestions..thank you

Any one who solves housing problem, has solved a lot of problems..... do the foundation and tomorrow would take care of itself..

GOODLUCK

Goodnews is; I started the part3 finally - for structures not bungalow.... (link to post would be shared once completed)

wish me luck....

ok ooh... A TI GBO OOH

psucc:
My sitting room measures 20ft x 18ft. How much will cover the floor using local tiles. Not mirror sufface o to avoid story that touch.

here:
https://www.nairaland.com/5420029/how-calculate-quantity-tiles-needed

sunnx:
Nice eye opening topic.

I have a question. A room and parlour self contain which some people called 2 room self contain absetos ceiling of mine is confusing because it have extension before entering into kitchen and bathroom.

Both parlour and room has same size of normal uncut four ceiling joined Ai each edge of the wall with cut half ceiling plus another cut of the ½ ceiling which mean half ceiling was cut again to form square I hope you can understand @poster. This means in a room plus area leading to toilet/kitchen, one full ceiling is there with a slice ceiling to make up the wall. No in total I have regular standard 5 ceilings 4 cut half ceilings plus a cut from already cut ½ ceiling then a slice to patch or to complete the widow side. Note kitchen and bathroom/toilect has same complete ceiling and one quanter (⅓).

Now how can some calculate the actual ceiling and size of the rooms plus the bathroom and kitchen in someone want to buy a carpet or rug?

Hi,
Thanks for following and the compliments....

your question is a simple one:

solution:

each ceiling tile (asbestos) is 1.2m by 1.2m = 1.44m2
hence half of its (on both axis) is 0.6m by 0.6m = 0.36m2
while dividing it into 2 is 1.44 / 2 = 0.72m2
if its divided into 3 for the edges of the room then it is 1.44m2 / 3 = 0.48m2

count how many of each type you have, multiply by it's area and add all together.

eg
A room with 6 full size, 3 quarter size (0.6by0.6) and 3 of 1/3 would be:

1.44 x 6 = 8.64m2
0.36 x 3 = 1.08m2
0.48 x 3 = 1.44m2
hence: (Add all)

ROOM SIZE = 12m2 of Rugs. (this is actually a 4m by 3m room when sketched on paper)

GOODLUCK

Hi All...

I think it's time to work on Part3 of this article considering market prices has gone up and also this time using a storey structure, so we can accommodate for rebars and more....

Stay Tuned.... and wish me strength to prepare it (I yam a lazy reader / writer)

I'll modify the design used in this part to include an upper floor and we are good to go.....

GOODLUCK in your various projects....

I-Say-D-Fact

n3xt:
That’s more like it. Just make it official.

LET'S LEAVE IT THERE - THERE'S NO NEED TO REMOVE, BEST WISHES

n3xt:
Hey baba!

This is quite a tricky one.

On one hand the liability lies with posters as they're the one making the posts/comments. Kobocity is not responsible for what our forum users post.

On the other hand, you can approach the forum administrator to remove any comment/posts/contents likely to cause offence/libel, or violate the forum’s acceptable use.

You can reach out to the admin of the site to sort things out.

You're basically asking me to send you same message via your kobocity mail.... OK.. I'll do that and see your action OR.... (wink)

EgunMogaji2:
And we that have no Madam nko? Who get am for the house?

lol nkechi has it

n3xt:
Announcement!!!

https://www.kobocity.com/d/214-announcement-admission-into-lagos-state-technical-colleges-now-in-progress

Hi Next,

why are my original articles flooding the pages of kobocity without my permission and without referencing my blog were it was all taking from?

we're talking about 5 different articles....