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

good one.

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)

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.

Good evening sir.

Following

Terminologies from attached column design:

4Y16 - 03 - This means that the labelled element consist of 16mm rebar size and there are 4 numbers of such in it. The 03 means check 'Bar code' 03.
note: for complex works, you would be provided with a table showing the shape and cutting length of the labeled rebar (i.e check item no 03 on that chart)

12 Y10 42 - 175 - This means there are 12 numbers of 10mm rings placed at 175mm apart (c/c) in a known start and end point and you can check no 42 on the bar chart for more details.

i. Rebar in base (Matt)
The matt is 1m by 1m square and I've been told its 5 Y12 vertically and 5 Y12 Horizontally per base. This means I need 10 (5+5) numbers of Y12 and each one is 1m long. hence
10 x 1m  = 10m length per base. (but always add 200mm (0.2m) to your length to accommodate for bend (see diagram above). So let's recalculate and factor in bends.

10 x 1.2m = 12m per base. (The length of 1 rebar is 12m)
this means that I need 1 length of rebar per base.

SINCE ALL OUR BASE ARE SAME SIZE (not always so) I'll just multiple the number of bases by the number of length needed. (let's count the number of bases from our plan/design)

18 bases x 1 length per base = 18 lengths of 12mm rebar are needed for Matt.

Naira La ND B0t is has ba n ned me 5 times now, so I'm doing the post in bits.

Thanks for following

ii. Rebar in Starter Columns.
Notice that from the diagram our column is 1100mm (i.e 850+250) below site level (+0.00) and 750mm above the slab, the thickness of the slab is 150mm (+150).

This means the length of our starter column is 1100mm+150mm+750mm (overlap)+200mm(bend) =  2200mm i.e 2.2m per column - BUT its is labelled as 4Y16 meaning each column has 4 of that length.

Hence:
Rebar per column = 2.2m x 4 = 8.8m
Numbers of column = 18 nos
Rebar needed for all 18 columns = 8.8m x 18 = 158.4m (if 1 length is 12m long, then)
158.4m / 12m = 14 lengths of 16mm rebar are needed for Starter Columns.

iii. Rebar in Rings
From the design, we have been told there are 12 number of rings in each starter column, we have 18 columns = (12 x18) = 216 numbers of rings in all.

How they arrived at 12? easy, length of starter column is 2200mm (2.2m) just divide this length by the spacing of rings i.e 175mm apart.
i.e 2200 / 175 = 12.

but, what's the length of 1 ring? - Since the column is 225mm by 225mm, to get the length of ring minus 50mm from 225mm  (so the ring would be a bit smaller than the column and fit in) = 225mm - 50mm = 175mm.
As the name implies, its a ring of 175+175+175+175 (to form a square) = 175 x 4 = 700mm

add 100mm to it for bend = 800mm per ring.
we have 216 numbers of rings. therefore
Total length of rings needed = 216 x 800mm per ring
= 172,800mm i.e 172.8m of rebar (If 1 rebar is 12mm long)

Then: 172.8m / 12m = 15 lengths of 10mm rebar are needed for the rings

iv. Binding Wire

see attached picture (I've been banned not less than 10 times and might discontinue the post)

Surely a reason must be given for banning you. Your post is highly educative, I dont understand why you are banned. Please speak to admin.

Meeenah:
Surely a reason must be given for banning you. Your post is highly educative, I dont understand why you are banned. Please speak to admin.

Thanks for your concern. I've sent a message to lawyer but he didn't reply, i've tagged seun no reply

I've read my post 10 times over and can't find why they keep banning me as much as 10 times now.... but we move... because i promised to do this, I might drop the remaining post as pictures just as I did for the last one above. Thanks

2D. Foundation:

Basically what we'll be doing here is finding the total LINEAR LENGHT of the trench, the WIDHT of the trench dug and the thickness (DEPTH) of the concrete you intend to cast... (L x B x H)

See the screenshot attached for calculation details and cost advice.

2E. Block-works to Foundation:

Note: Sub-Structures are works below the German floor
while; Super-Structures are work above ground level.

The blockwork being discussed here is part of the sub-structure.

credit: The 3rd pics was taken from 'amazingviewpoints blog-spot'

2F. Filling:

If you missed the note on filling in part2, please check it out

2G. German floor:

I used 1:3:6

No3: Super Structure (Blockworks)
Super-structure refers to all civil works above the German floor; this comprise majorly of block setting, lintel and columns up to roofing.

No3B: Columns and Lintels
Columns are straight forward, recall we have 18 columns, and from design, each column has 4 lengths of 16mm rebars.

No4: Beam and Decking
This is a topic on it's own and there is no way we can deal with it as a sub-topic, but luckily I have a full and detailed writeup on this topic already, what's even better is that I used the same design we're using here for the post. Permit me to link you to that post here

>> https://www.nairaland.com/6099160/how-calculate-materials-needed-beam#98587079

COST IMPLICATION for item 4:[b][/b]

>> Materials Needed:
Bamboo =185 x N300 = N55,500
2by3 Wood = 95 x N500 = N47,500
1by12 Plank =250 x N1800 = N450,000
10mm rebar = 45 x N3500 = N157,500
12mm rebar = 192 x N4800 = N921,600
16mm rebar = 42 x N8500 = N357,000
Cement = 110 x N4000 = N440,000
Granite = 45 x N6000 = N270,000
Sharp Sand = 2 tipper = N130,000

>> Labour - (Welder + Carpenter + Bricklayer) = 100k+200k+150k = N450,000
>> Miscellaneous Cost - This covers for transportation, binding wires, bamboo, nails etc - N200,000

Summary: (Material + Labour Cost + Misc) = N3,479,410:00k

No5: Blocks on Upper Floor  
This uses the same principle as the block setting on ground floor; in-fact because the design I shared for this purpose has same space on ground and first floor, if we calculate - we would get same figures as what we have on item NO3 above.

However, do factor in that works on upper floors are a bit more expensive, because you might have to pay separately to move blocks up or the bricklayer would include that extra in what he's charging and might not accept same amount he accepted for similar work on ground floor.

No6: Roof Carcass and Roofing Sheet (Aluminum Long Span) 
I prefer to open a new thread for this calculation, because just like beam and slab, it's more than we can treat as a sub-topic. Watch Out.

No5: Blocks on Upper Floor  

This uses the same principle as the block setting on ground floor; in-fact because the design I shared for this purpose has same space on ground and first floor, if we calculate - we would get same figures as what we have on item NO3 above.

However, do factor in that works on upper floors are a bit more expensive, because you might have to pay separately to move blocks up or the bricklayer would include that extra in what he's charging and might not accept same amount he accepted for similar work on ground floor.

No6: Roof Carcass and Roofing Sheet (Aluminum Long Span) 

I prefer to open a new thread for this calculation, because just like beam and slab, it's more than we can treat as a sub-topic. Watch Out.


Windows, Doors and Burglary next

No7: Windows, Doors and Burglary

This is a straight forward estimation - because you're basically buying and installing. Quantity are for both ground and upper floor.

0.6x0.6 casement window = 8 x N25000 = N200,000
1.2x1.2 casement window = 6 x N36000 = N216,000
1.5x1.2 casement window = 14 x N45000 = N630,000
1.2x2.1 iron door = 2 x N80000 = N160,000
0.9x2.1 iron door = 2 x N65000 = N130,000
0.9x2.1 wooden panel door = 8 x N85000 = N680,000
0.75x2.1 wooden flush door = 8 x N70000 = N560,000
All windows are with net, burglary and have labour inclusive but add for transportation for all items.

COST IMPLICATION for item 7:

>> Materials - N2,576,000
>> Labour - This covers related bricklayer's work - N100,000
>> Miscellaneous Cost - This covers cement etc - N50,000

Summary: (Material + Labour Cost + Misc) = N2,726,000:00k

No8: Tiles

Kindly refer to the link for my tutorials on tiling >> https://www.nairaland.com/5420029/how-calculate-quantity-tiles-needed

No9: Plastering of walls (Internal & External)

This will come in a different thread, but see part 2 to have an idea.

No10: Painting

This will come in a different thread, but see part 2 to have an idea.

Thanks for following, I sincerely do hope that someone out there must have learnt a thing or two - If you notice any mistake in this write-up, please feel free to point it out - GOODLUCK AS YOU BUILD THAT DREAM HOME... and remember, the man who solves a housing problem as solved a lot of problems. Don't wait for the millions - start today with what you have.

I am
Say-d-Fact

How can one calculate amount of block for soak away...the size is 6ft by 5ft...
Thanks