Good day house, how many hours is it proper to remove formwork from concrete casted columns nd beam?

Lekan239:
let's say a standard self contain takes 700 blocks, it might not be upto 600blocks

(1) 700 x 250= 175,000

700block÷70 will give you the required number of cement to lay the block= 8bags of cement

(2) 15bags of cement x 4,500= 67,500

(3) you can run half DPC

(4) 1 trip of plaster sand will be enough at 35k

(5) Gravel 1 tipper, there will be leftover 50k or less

(6) iron and wood for lintel and pillars plus workmanship for a self contain budget 60k

Taking a house to lintel level is not quite expensive and very easy. The main spending comes in after lintel level.

So with 500k or less you will get a self contain to lintel level.

You are paying community 250k for building a self contain. For what?

Good day good pple,
Pls is it possible to use 1inch granite size for columns and lintel for a storey building? If yes, what is the right mixing ratio to achieve grade 20 strength?

uncleteeh:

You can take it to a steel testing lab to determine it's strength, also collect a copy of it's properties from the buyer.

Ok thanks

olukaygold:

You can manage it sir, but try to follow 30cm stirrups spaceing for foundation columns and 40cm stirrups spacing after DPC,this would prevent skipping/hanging when pouring the concrete. Pls try to text or call me for any enquiry, I'm offering free consultation. my thread is already derailed sir

Thanks Chief engineer, God bless you immensely for the insight.
Pls what is the long time adverse effects of using this size of 1 inch granite for columns for a storey building? What is the acceptable mixing ratio for this size to achieve the best strength? For the spacing see below picture, it's already at 203mm (8 inches) on 16mm tiger TMT Bar

olukaygold:

Depending on the size of your columns, and beams. 3/4 granite size is the standard size for a story building sir.

Hmm, I av a serious problem with this oo. I ordered for a 3/4 granite yesterday the bricklayer told the supplier to supply 1 inch and he obliged oo. What can I do now now with this 1 inch granite supplied!

olukaygold:

You misinterpreted the Mixing Proportion sir, 4headpan(Sand), 6headpan(Granite),1bag of cement which is 1:2:3(M20 Grade) Is okay for a story building sir.

Pls engineer which one is better for columns and beam for a storey building? 3/4 granite size or or 1inch granite size and what is the right mixing ratio for each of the size

olukaygold:

Yes sir,You can use it.

Thanks Chief engineer

olukaygold:

You misinterpreted the Mixing Proportion sir, 4headpan(Sand), 6headpan(Granite),1bag of cement which is 1:2:3(M20 Grade) Is okay for a story building sir.

Thanks Chief, really appreciate
what size of granite r u referring to? Am using 3/4 size

olukaygold:

Not all these online stories You've to be following because they only drop reviews based on the kind Project they're Handling. The stirrups spacing of 10cm is not for a Story building.Involve a Professional Builder on your building or atleast ask two or more Artisans for reviews, if not, You'd spend more/Waste Money on Materials when handling it by Yourself.

Ok no wahala, noted. Although my engineer said it could be 300 or thereabouts, but I decided to leave it like that.

Moreso, what is ur view about the mixing ratio of sharp sand 5 headpan, granite 3/4 size 4 headpan, 1 bag if cement.
Thanks engineer

olukaygold:

Who recommended it? The spacing can go between 40cm-60cm. But if you can afford it to be 20cm Stirrups space,then you're Good to Go.



Don't forget to Patronize Us.

Actually it's for a storey building, I read it online that it should be around 20cm for a storey building especially for columns.
No whaala, it's just a small building inside a well populated city. When we have big one, no wahala. Noted!

olukaygold:

You can sir, infact 8mm is the minimum for Stirrups but you'll need accurate spacing of 40cm(16". But For 10mm, I always use 51cm(20".

Is 40cm not too much?
I plan using 200mm for the stirrups on 16mm tiger TMT bar

olukaygold:

Stirrups _12mm
Iron bar_10mm to ring 16mm Column
8mm to ring 12mm column
Either 8mm or Quarter rod to ring 12mm windows/Doors beams

Oh! Thanks Chief, u mean it's not possible for 8mm ring stirrups to hold 16mm pillars bar?

Biztech05:
Wood wrk on going with iron bender work...
Gateway update...
Stay tuned
@ Biztech consult

Pls what is the thickness of the stirrups? And also what is the thickness of the iron bars for the pillars nd lintel on this project

olukaygold:
Men at Work

Pls what is the thickness of this iron bars? What is the thickness of the stirrups? What is the spacing between these stirrups to each other?

Pls engineers in the house, kindly help me to ascertain the authenticity of the attached TMT TIGER if it's truly original TMT TIGER. U can also help me with the image of the original TMT TIGER if this is not genuine

Good pple in the house, pls what is the best length of steel bars to cut for LINTEL PILLARS someone said I should cut it as 4 metres but my welder said I should cut it at 10feets highest.

Also what is the best strongest mixing ratio? 1:2:4 or 1:1.5:3?

Ogborokiri:
Good morning please just one self contain this engineer is saying 1.4 million to raise it to lintel level please is the amount okay the location is delta state

Tell him to provide u with quotation listing how the price of materials and workmanship. Then the gurus in the house can help u determine the authenticity

DMTtechnologies:



Your dimension is a bit confusing though. But if i am to go strictly with the parameters u gave me =
L= 15.24m
B= 7.62m
Thickness= 0.23m

Total Concrete Volume = 26.71 m3

For the concrete grade 20 u intend to use, You will need;
Cement= 215bags
Sand= 16tons
Aggregate = 33tons

Regarding your question asking to use a certain size of reinforcement, I will advice that you stick to your structural drawing.

Cheers!

Thanks for your time and the insight engineer. Currently am on the lintel level now not slab(decking). I just want to have idea of the total cement, sand, and iron rod for the 16 pillars and the lintel in general.

FEGEITOK:


Engineering Enthusiast

That said it is one thing to use rebar (iron rod) it is quite another to use it properly.

See the following pictures posted by a highly respected engineer on this thread.

Not everyone does it to spec.

Note: pictures not mine, pictures copied, all rights duly respected

I saw the pictures but couldn't figure out the difference between the 2 stirrups and the columns

FEGEITOK:


The standard practice is that you do 1 part cement to 3 parts coarse aggregate.

What is supposed to be varied is the sand of which you are using 1.5 parts.

So as far as I am concerned your mix ratio is fine.

I use 1 part cement to 2 parts sand to 3 parts course aggregate though.

As for your question on using 16mm for the columns and 12mm for the upper beams, here are a collection of links for you to review.

It seems to have received the seal of approval from maestros on this thread

Thanks for your time engineer

sonnie10:

If they are of equal length, that means each is about 3.2feet in height.

Sure u r right here

sonnie10:

Is the total length of the 16 pillars 50 feet or is this the length of just one pillar?

How could the length of a pillars b 50feets? Which kind wahala b this! Pillars is 3meters each or 10feet each highest. The building length is 50feets while the breath is 30feets. Pillars is usually 9" inches width each. I don't understand ur question oo

sonnie10:

Is the total length of the 16 pillars 50 feet or is this the length of just one pillar?

Total numbers of the pillars is 16 numbers .
Length 50feet breath 25feet

sonnie10:


Are the units of these dimensions accurate?

I don't understand

Good day engineers in the house, pls which of these is the best TMT IRON ROD currently in used today and tested ok.
PSL, TIGER, HITECH, LCI including their prices.
I want to know the best among them before the purchase.

DMTtechnologies:



* What are the sizes of the "pillars" (LxBXW)
* What's your Mix ratio

The entire pillars is 16 Nos
My mixing ratio is 1:1.5:3 u can as well recommend the best mixing ratio for me also. Length 50feets: breath 25feets: width 9inch size of a 9inches blocks which was used for the entire wall.

Also is it ok to use 16mm for the columns and 12mm for the upper beams for a storey building

Good day engineer in the house, pls like how many tons of sharp sand & 3/4 granite including cement can cast. 16 pillars successfully including the lintel

destiny10:
Relocation sales-6pcs of curtains available at give away price 5k only.

Only the curtains no rails pls

Location nd contact pls

Stevo30:
Please I got this quote for some column work, is it fair

*Column Casting*
27 pcs (230 x 450 and 230 x 230)

33 bags of Cement = N141,900
Sand = N120,000
Granite = N180,000

1 ton 16mm rod (TMT) = N560,000
15 length 10mm = N57,000
Binding Wire = 16,000

Column formwork rental = N150,000
(Bamboo, Wood, column shutter, nail and workmanship)

Iron bending = 50,000
Casting = 30,000


*N1,324,900*

I think d price is fair for 27 columns, but d cement is too small oo. It should be 3bags for 2 columns, which should be like 40bags. what about beams?

kalu61:
Nawa oo.

No bi Coren exam l de write
The dryness of the sand and granite affects mixture. However, the slurry, the better.

U try, thanks

kalu61:


Soft and sand inclusion. Na theory you de talk . I don't use them. Only sharp sand.

That mixture up there is my standard.
Some do 1:5:5

Ok thanks, what about water ratio to the above mixing 1:5:5? How many litres of water is adequate for the above?

kalu61:

Will car park on it?

1:4:4
1 bag of cement to 8 sand and 8 granite of headpan. If you want to be economical then make it 9 sand and 9 granite.
12mm is fine.

Is it only sharp sand? Wot about soft sand inclusion?

Also what is the best mixing ratio for lintel and pillars for a storey building