Chichilas:
Good Evening house,

Please I need advise on a construction project. We are planning to erect a foundation for a two storey building on a plot of land which used to house an old building. We have demolished the old house and then noticed that the old soakaway pit is inside the perimeter of the new foundation. In fact a pillar for the new building falls into the old soakway pit location. My engineer says to open the soakaway pit and fill with sand and compact for the next couple of months before the new foundation. My concern is that I have seen foundations settle even after 2 years so I am worried about that possibility. The pit is 8ft by 6ft

Experienced engineers in the house, what are my options to fill the Soakaway pit?

I would appreciate all suggestions.

Establish the base of that column before filling the soakaway pit.

Horlardorjah:



Exactly what I wanted to type.

Colleague wey Sabi...but I be fastest fingers

What is the type of foundation you are constructing for your building?

Since you won't be needing the soak away pit any longer fill it up with hard core and sand. Then compact very well as your engineer suggested.

Chichilas:
Good Evening house,

Please I need advise on a construction project. We are planning to erect a foundation for a two storey building on a plot of land which used to house an old building. We have demolished the old house and then noticed that the old soakaway pit is inside the perimeter of the new foundation. In fact a pillar for the new building falls into the old soakway pit location. My engineer says to open the soakaway pit and fill with sand and compact for the next couple of months before the new foundation. My concern is that I have seen foundations settle even after 2 years so I am worried about that possibility. The pit is 8ft by 6ft

Experienced engineers in the house, what are my options to fill the Soakaway pit?

I would appreciate all suggestions.

Good morning everyone...
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Krafom_Engineering

Good afternoon Sir michlins... Please am I to pay for installers or it's the job of the welder? Cos this man is telling me that he is not the one that will install it

redgem:
Good afternoon Sir michlins... Please am I to pay for installers or it's the job of the welder? Cos this man is telling me that he is not the one that will install it

honestly there's no way I can answer this question because I don't know what you agreed upon. If he did a separate foundation casting for the tank stand,he will by default be the one that will install as he doesn't have a choice. But if it happens that he did it on ground,both of you will have to find a common ground if you didn't tell him prior that he will have to install

segcymoor:


Colleague wey Sabi...but I be fastest fingers

You be boss nah. Well done sir

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michlins:
honestly there's no way I can answer this question because I don't know what you agreed upon. If he did a separate foundation casting for the tank stand,he will by default be the one that will install as he doesn't have a choice. But if it happens that he did it on ground,both of you will have to find a common ground if you didn't tell him prior that he will have to install

He isn't casting from the ground, he is doing it from his workshop... Before, he said he isn't the one installing but will do it for me and I clearly told him that it's not how it's done and people I've seen are the ones constructing and also installing... Now he is saying that I will get an installer.

redgem:



He isn't casting from the ground, he is doing it from his workshop... Before, he said he isn't the one installing but will do it for me and I clearly told him that it's not how it's done and people I've seen are the ones constructing and also installing... Now he is saying that I will get an installer.

if he's doing it away from site, you need to find common ground with him but you will have to part with something. These things were supposed to be discussed from get go.

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uncleteeh:

Establish the base of that column before filling the soakaway pit.

Thank you everyone. I ll tell the engineer to go with this. Makes more sense.

michlins:
if he's doing it away from site, you need to find common ground with him but you will have to part with something. These things were supposed to be discussed from get go.

I already told him earlier that he is the one installing....

michlins:
if he's doing it away from site, you need to find common ground with him but you will have to part with something. These things were supposed to be discussed from get go.

I always thought tank stands are usually built from ground up on site by the welder. I've never heard of one being built away from site, and then the client being expected to transport the stand to site and getting someone else to install...isn't that a recipe for disaster someday in the future?

Rany4all:
I always thought tank stands are usually built from ground up on site by the welder. I've never heard of one being built away from site, and then the client being expected to transport the stand to site and getting someone else to install...isn't that a recipe for disaster someday in the future?

Exactly… the one who did the construction should be the one to install.. if anything should happen the blame will now start

Rany4all:
I always thought tank stands are usually built from ground up on site by the welder. I've never heard of one being built away from site, and then the client being expected to transport the stand to site and getting someone else to install...isn't that a recipe for disaster someday in the future?

depends on the height. And the size. Some are too small that they can be made and transported to site.


In some towns I have visited, they make tank stand and sample for sale

michlins:
depends on the height. And the size. Some are too small that they can be made and transported to site.


In some towns I have visited, they make tank stand and sample for sale

Seconded!

folmus:


Seconded!

personally I will prefer to install my jobs myself to avoid stories of tank collapsing but then, I no be everybody

twinskenny:


Exactly… the one did the construction should be the one to install.. if anything should happen the blame will now start

Thank you for this....

Aforxzy:
The ratio of your concrete mix determines the strength, workability and durability of your concrete structure. The strength is gotten from granite , that's why more granite is used in the mix while the binder is the cement.

Often times you see people using less of the granite because they want a fine finish and they end up compromising on the strength. Also site labour reduce the quantity of granite because it makes the mix heavier for them to carry.

So your workmen are invariably reducing the strength of your concrete element with that mix ratio and it has nothing to do with your location.

A finely finished concrete is gotten from properly mixing the components, vibrating to remove voids and using a good formwork and not by reducing the granite quantity.

However the granite should be washed and free from dirts and clay.

It's your project , insist on the right mix and they will comply.

I doubt u are female tho ahhh... Na man u be boss. thanks alot.

MRFIXER001:
Mix ratios are decided based upon the type of construction structures and mix designs by the structural engineer.
And it's categorized into three which are;
A. Nominal Concrete Mix Ratios
B. Standard Mixes Ratio
C. High Strength Concrete Mix Ratio

Mixing ratio depends on the load and compressive strength of the concrete.

In conclusion 1:2:4 means 1 unit of cement, 2 unit of sand 4 units of granite. And it's advisable to use that. Anything more reduce the compressive strength of the concrete

wow it's funny that this weird mix ratio of mine is a norm here ... I'm learning.

money121:
Job Done!!
Another Successful Roofing Project Completed
Site Location: Bariga Lagos State
Roof Design : Roman Design
Colour: Black


https://www.youtube.com/watch?v=UZlEHPstcxs?

To get the Cost that Roofed this Building Call/WhatsApp 08085310359

Cost Estimate for the roofing project Without Woodwork

2.3m

how do u guys work ur sqm for a building? normal length x width?

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Reeefe:


I doubt u are female tho ahhh... Na man u be boss. thanks alot.

Na female she be. Our female rep here.

@Aforxy,
pls what should be the ratio mix for a gate pillar post

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twinskenny:
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This place looks like my popular amala joint

Olumighty123:


This place looks like my popular amala joint

Very very correct boss

dannie007:
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I wish you Goodluck in the project.

Chichilas:
Good Evening house,

Please I need advise on a construction project. We are planning to erect a foundation for a two storey building on a plot of land which used to house an old building. We have demolished the old house and then noticed that the old soakaway pit is inside the perimeter of the new foundation. In fact a pillar for the new building falls into the old soakway pit location. My engineer says to open the soakaway pit and fill with sand and compact for the next couple of months before the new foundation. My concern is that I have seen foundations settle even after 2 years so I am worried about that possibility. The pit is 8ft by 6ft

Experienced engineers in the house, what are my options to fill the Soakaway pit?

I would appreciate all suggestions.

I want to assume there's a structural design for this.

There are so many alternatives assuming this wasn't factored into the design.
Please work with a design engineer on this. As I wont be held liable.
From my experiences related to such cases, one or more of the following have been applied at one point or the other.

OPTION 1:
Evacuate the pit, then break the floor and construct either a mono pile of 450mm(18 inches) or group pile depending on the load at that column (pillar) inside the pit then cast the column from there upwards and connect the nearest columns with a beam of 450mm to 600mm (this can be called chaining by the laymen) then fill the pit with sharp sand.
The piles can be drilled using manual borehole drillers and a pipe as a casing.


OPTION 2: (this should be cheaper)
Just like option 1, instead of a pile, you can cast the base inside the pit after breaking the floor then raise the column from there.
Please note that this column should be wider say 450mm x 450mm if the depth is UpTo 2m (almost 7ft) and well reinforced with rings not more than 150mm (6inches) spacing for the column.
At the ground level you can use a 450mm height beam to join(chain) all closest columns (pillars) with 300mm spacing for the beams.

OPTION 3:
Firstly demolish the slab of the pit and fill with sharp sand while compacting properly or naturally(which would take 1 to 2 raining seasons say 2 years) with the aid of water or rainfall then fill up with boulders at the top 900mm to 1m (3ft to 4ft) from the natural ground level.


OPTION 4:
filling entirely with well placed and compacted granite boulders (called hardcore).

OPTION 5:
Casting a base that would cover the entire area of the pit which must be designed to avoid failure after pit has been sand filled

OPTION 6:
Run an inverted "T beam" with a almost a meter width(3ft) in base of at least 900mm to 1200mm (3ft to 4ft) height along that axis. This would help spread the load during settlement.

Spacing of rings shouldn't exceed 300mm

folmus:


Na female she be. Our female rep here.

mad ohh she need to train me ohh

gandkiss:
@Aforxy,
pls what should be the ratio mix for a gate pillar post

1:3:4 wouldn't be bad