Rexceedo:

All materials are handy. How can i negotiate and know how much is okay

Labour fees depend on location.

Other form of negotiations is tricky if they quote cheap you don't expect a good grade concrete etc

If they quote high doesn'twarrant a good job likewise

Supervision fee is always of preference to a particular person if its not a firm handling it. So look for Someone create a good business relationship.

How much is okay depends on scope of work terrain and your site personal challenge's . maybe a sketch can gve d assumed cost if u have

Rexceedo:
My bosses,
I finally decide to start developing my lands this year.
Am starting with a 2storey twin flats(1 Two bedroom flat and 2 One bedroom flat).

Please is it advisable to pay for labour myself or give it out to an engineer?

How much is apt for labour plus supervision till DPC?

If you pay for labour who will supervise the building and read out all drawing in relations to another and also look out for conflict.

If you have the fund gve it out to an engineer

Or contact a Quantity surveyor get all materials on site and pay for the supervisor service fee and negotiate labour

abcivilengr:
Have anyone here ever done a cantilever slab of about 2m and also loaded... I need clues on the safety

1.85m or so SAFETY CONSIGN
Take note of all loads acting on it and if there's any partition on such slab it must be account for ..
if a partition is not on the architectural drawing pls assume there's and load the edge of the cantilever because the design maybe review during construction
The detailing aspect is crucial the tension bar should be return by 1.5L of the cantilever span..
Its safe and possible when design properly..

cost wise
If you not really comfortable with it and wall load will be aligned to the edge use upstand beam this will reduce the depth of the slab and other sections because initially u will have a dipper beam section to counter the effect of the cantilever.

hairbyuj:
Please how much be the price of

1ton of 10MM,

12MM

16MM iron rod

Site is in Awoyaya.

local per tonnes is 260, 000
TMT 315,000

Price include delivery to your site (LAGOS)
@n3xt thanks for the Mention

updated price for steel
local 260, 000
TMT 315,000
All prices include delivery to lagos site only.

segzyfunmi:


Pls professionals in the house, help answer my questions.

No one will do over site conc. at that rate some practical reason .

Cost of boarding the edge (carpenter will charge you)

The carpenter still needs to be there should in case of unforseen event

Cost of machine and operator

If you settled for hand mix Manson will charge more to mix. Over site conc. Mix becomes harder heavier than just blinding

When labor hear concrete forget it they will likely not take 1500 except all stages of work is guarantee for that gang.

Like next said share your plan or gve this project to a Q's to quote for you

diordaves:


Without the plan, the figures here are just ballpark figures but this will give you an insight into how this is done:

#Digging the foundation of 3 bedrooms aim for 50k.
(In Abeokuta, this might be tricky as the town can be rocky and difficult to dig but then again, because of the terrain you may not need a very deep foundation to get to stable soil).

Blinding aim from 35k

The setting of foundation block: I don't know how big is you flat, but let's guess 1300 blocks with a high foundation. To lay one block is N50.
so 50x1300 = N65k

Iron Bender to tie the basket and columns: aim from N35k

Carpenter formwork aim from: 10k

The casting of the Columns: For three bedrooms, depending on your design, your total columns should be around 16 columns. To cast one column aim from 1k per column.
So 1x16 = N16,000

Foundation and back filling aim for: 15K


Wetting of foundation (compacting) - 1k

Casting of German floor aim from: 10k

Total Labour: N237k

These figures are highly debatable but hopefully, you should now have an idea on the direction of travel.

BLINDING COST 35K y is casting of german floor now 10k pls guide me .

segzyfunmi:
Good evening to everyone.


Pls I need a quick professional response on my matter.

My uncle wants to start his project in Abeokuta on Monday. His site has been cleared and foundation is to commence on Monday. He just funded his daughter's wedding last Saturday so he's not too boxed up, but he still insist on starting with one loose fund of #2.5million.

The problem is the engineer in charge is insisting on 3Million as indicated on the BOQ prepared by him, then an additional 5% of 3Million as the engineer's fee. Labour alone is 550k excluding engineer's fee.

It's a plot of land with very hard/dry soil in Abeokuta. The plan is strip foundation of 3bedroom up and 3bedroom down. That's just a storey building.

Professionals in the house pls help analyze if this high cost is worth it.

The 3 million is to what stage of work

I like the idea of strip footing also..

Get the structural plan and Architectural plan and give to this thread member quantity surveyor .
Let him quote in stages for you.

Maybe by Friday I will relocate come Abk to handle this job for you sir according to the specification quoted

My love for Abeokuta

PrimeQuay:
Kindly update us on prices

16mm
12 mm
10 mm

Thanks

Good morning updated price for today including delivery to site

Tmt Tiger 315,000 per tonnes
Local 265,000 per tonnes

megacontrol:
Thanks a lot.

You've also touched on very cogent points, most are already covered in our structural plan and therefore already considered.

The reason I asked that specific question is that even when the plan states a cover of 20mm (i.e. 0.78" and you translate that to granite sizes, it appears to me like both 3/4 and 3/4 down qualify since that's 0.75" when converted.

All points considered, we will go with 3/4" (0.75" for this particular slab.

Just for the sake of learning... what is the 3/4" down granite size commonly referred to as in mm? also 20mm (since it is smaller than the 3/4)?

Cheers.

Ok i will explain
the 20mm for maximum aggregate size is no 6 in the general note you uploaded ..I did not use cover to determine this .you will notice the cover for your foundation , beam, column , are all different because this are major element as an example

the reaction of the soil can have some great impacts on the concrete which may attack your rebar and this will lead to loss of strength, this cover is determine by ground conditions

for column/beam etc weather condition and fire rating to protect the reinforcement one of the advantages of concrete building though..

i think 3/4'" down should be in the range of 3/4"' to 1/2" sieve varying . I stand to be corrected though

megacontrol:
Guys,

Which one of 3/4" or 3/4" down granite is more suited for 175mm slab casting and why?

I am considering using the 3/4" due to the high volume involved as that will consume less qty, are there other considerations i should be looking at?

thanks

size of aggregate use is always determine by the clear cover of your structural member , check your general note you will notice the size of aggregate for each structural member..

in most cases we use 20mm coarse aggregate after factoring the cover after placing your rebar(iron) for you not to high have pores which leads to weaker members at times...

contractor then prefer to go for lesser size for some reason clean job because of workability problem with higher size of granite, when they use this granite size it makes them save in labor cost due to time and more job recommendation because you see everything when the formwork is removed comes clean ..

in your own case for now any structural discussion one have to have a clear scope of work before giving advise
do you have beams you want to cast together with this slab and what size is the width and how many number of reinforcement do u have at top and btm .

how close are you to a fire station ?
purpose of structure?

for you to have a 175mm slab we may likely say deflection plays a major role in your build also .. in any ways pay attention to workability and don't go and cast grade 15 in the name of making concrete workable.

stevemims:
What're the current prices for:

12mm
10mm

@next

Local is 260k per tonnes including cost of transportation to site
Lagos Axis only for the transportation cost included @n3xt thanks

TMT as at this morning (09/01/2021)is 325k per tonne
Local is 265k tonne

Price include delivery to site

kingzsoul:
Hiw much is 1tonne of 12mm

Sorry for the late response
TMT as at this morning is 325k
Local is 265k

Price include delivery to site (Lagos)

michlins:
is there a significant change in the prices of steel at your end

Current price
Good morning to you Sir,

TMT as at this morning is 325k
Local is 265k

Price include delivery to site

Previous price

TMT/HITECH N 320,000 per tonnes
LOCAL N 275,00 per tonnes.

aji2000:
Please I need a trustworthy aluminium fabricator, I need estimate for 3 bedroom flat

i can recommend one for you send the measurement
yusuf 09030324890, 08120050803

Good morning ,
I made contact with one of our major reinforcements (steel ) suppliers, we had the following agreement to supply adequate sizes and result.


For the local we will request from the company or probably take it to LSMTL .

current price TODAY
TMT/HITECH N 320,000 per tonnes
LOCAL N 275,00 per tonnes.
Price inclusive of delivery to anywhere in lagos.

WHATSAPP/CALL 08103776089

https://www.nairaland.com/6351429/buy-reinforcement-iron-rod-us

Good day
we sell and deliver reinforcement direct to your site anywhere in Lagos
Reinforcement are of full gauge

current price TODAY
TMT/HITECH N 320,000 per tonnes
LOCAL N 275,00 per tonnes

WHATSAPP/CALL 08103776089


PRICE INCLUSIVE OFF LOGISTIC TO LAGOS SITE ONLY

note thread will be updated when there's an increase in price generally

folmus:


Recommendations for those doing kobo kobo projects who do not know how to run the test?

Some distributor's already carried out this test from where they pick from and you may request for such result . if you are not satisfy take it to any available lab yourself.

Good morning all,

On the issue of reinforcements using local bar , TMT et all., and the cost implications ,strength..

The designer of any structures choose the grade of steel he/she intends to design with, this grade will be clearly written at the 2nd page (general notes) or on each page footer of the S.Drawing, the implications of this grade choose for your project will determine robustness , number of required required reinforcements in each structural member
Lay example below.

If I use 410n/mm2 say column of (230x230mm) for a duplex it may requires 6 nos of T16mm and use grade 460 for same column it will require 4 no of T16mm (assumption), the implications of this is that if baba lati supervise for u he will do the following

1)Tell you he built same thing at honourable place @ lekki they use 4 No's of 16mm and the structure is still standing till today.
2)This Engr is not considerate
3) charge you for same 6nos and put 4 No's inside, And cast

forgetting or lack d knowledge of variables and notes in the Drawing.

To the main discussion we have various kind of steel in the market , which most are very bad and good only known brand can easily be passed , most of all this local steel of unknown origin are having same properties as plain bar(unthreaded bar (that iron we use for burglary then)) ..

How do you recognise all this in d open market?

Its difficult for small project since u will b procuring ur steel in batches and from cheapest source available ,u will likely not run a tensile strength.

Large projects and mindful owner (contractor) make use of standard and mostly consultant is always on site contractor will b mindful else he will waste money when ask to break concrete and re do and he looses credibility gradually because during next meeting on a job and such contractor name is mention we strike such out without d company knowing self.

Summary
Buy iron brand that's traceable with clear identification on it

Never reduce or propose what's not in ur drawing without ur designer consent

Quantity surveyor should always quote reinforcements using quality brands price because contractor will not buy TMT when u quote local to make thing's cheaper

TMT is good , local is likewise good if you are running a test or buying good one

michlins:
the most important part of tank stand is the foundation. It varies from place to place and that's why it's recommended to do the job on site so you can see the soil you're working with and find out the kind of foundation it requires. What works in Nnewi will NEVER work in Lagos.

The weight of water and load is same everywhere and as such same material that works at point A can work at B provided the weight, height remains the same. It's a hollow structure and so wind can freely pass without compromising the structure.

Another factor is the ability of the welder to weld well. I don't know how to explain this part.

If the three factors are adhered to, you will get a structure that will outlive the building

You made mention of the foundation,

how do you calculate this load and transfer to the said foundation ?

Wind is a major factor too.

Reason same materials may not work is because of wind I will gve a brief lay example below..

If you build close to sea or open up area or hill where no winding breaking occurs at much such section may likely not work except for proper bracing compared to building such stand at Ikeja where its relatively developed or behind ur building..

The base plate, stiffeners, bolt ,welding even painting are all recommended.

The reinforcements in the foundation how do you go about it? Do u know which is the main direction, do you know where to splice your section or how to connect back such.

From your believe what engineer does is use same section change the wind pressure to see if it works and check the load against the Soil bearing capacity of same area Sir it work's u r good to go if it doesn't adjustment comes in and modification Sir.

I will provide you with your next 3 project on this tank stand drawing free since I notice this is what most people want to contract your service for here..

You will make a good fabricator since you are technological inclined ,

https://www.nairaland.com/3522155/iron-tank-collapses-secondary-school

kobocity:


Not just the tank stand alone but every other steel structures too.

My steel fabricator doesn’t weld gate or burglary proofs. He only handle steel structures.

Well detailed and impressive, I kind of like your diversity on most niche of building and engineering , don't forget to add a dedicated structural section on kobocity for some of us to review structural drawing and learn ..most building cost can be strategically reduce by optimizing the structural elements rightly

bixton:



The bold is not acceptable in construction engineering in any part of the world. Any type of design that leads to wastage of resources(material, money, labour and time) is just to hide the in-experience of the individual.

Yes you are very right sir. Every build should be of value , money is not easy to come by , reason most nairaland check on this thread and double check for alternative.

Good morning All,
I need to give some observation, read carefully.
As a silent reader I notice the trend of everyone wanting a steel tank stand, and materials suggestion keeps going on kindly notice the following.

Steel section are choose from expected load (tank size) ..but the bracing are always strategically place to reduce section at times or for stiffness purpose

If a steel section works in Lagos for example doesn't mean same will work in Abuja the wind pressure in each state in Nigeria is significantly different according to the wind isopleth data, so when assume this is always dangerous..

Section like UC, UB Angle iron etc all have minor axis and major axis meaning the direction of face are of important, reason you see people using CHS (recommended sizes) u don't have to worry about any local bending its strong all through .

The base plate need to be check like wise the HDB(hold down bolt)

The foundation this is important and done with three things put into consideration (weight of the steel ,wght of water , wind reactions on the structure ,live load of access also)

Not to bore you much your tank may be over designed (waste of money at least safe sha) or under designed (total waste of money and intending disaster waiting to happen)

A tank stand is a structural elements you should never toy with it because its failure is always a serious issues.

neduboo:
I want to do foundation for my 4 Bedroom bungalow.

The engineer gave me a quote for stage 1 foundation

Profiles #10000
Pilling #85000
Basement #45000
1 trip of sand
7 bags of cement

Please isn't this too much

do u have anything underground(below ground level) in this bungalow of yours.

what's in stage 2

no coarse aggregate

for others to contribute when it comes to crucial stage of work like this u need to tell us what the soil looks like if u don't have soil test..architectural plan included . then considerable opinion can b given

Rexology:
Professionals, please make una help me profer solution to this crack.

The wall section is not sufficient to take the self weight of the beam itself now u have ur roof load wall load and self weight of ur beam on the angle not more than 225mm max..

if the lintel had come out a little beam u could have lap it well there's always a satisfactory lap for this kind of thing it can kills when there's an uplift action from wind and u tie ur roof to this particular member at the terrace

solution from my own view since the load is small u can introduce a dummy column to receive the stress ..safer this way since we can't estimate how solid ur strip is or block..

jajeri3216:
Hello house , there's a crack on the wall which is causing me corncerns.

Is this crack suggesting structural issues?

I don't know if other members already suggested a solution .let me add one or two things,

How many floors is the said structure ?
Is the crack progressive?
Years of Usage?
Residential or any other usage?
Is there a column at that particular edge and can u make a video..

If its your column there's an issue and not something you should listen to the comment of a get a PhD bricklayer, who don't understand load analysis and distribution of a structural system..

Standard Solution

Share your structural drawing
The building will be re analyze to see where the problem is coming from

Structural assessment and integrity test
On all or selected members
Etc..

Kobo kobo solution( Assumed solution)
A UC or UB will be use to support the column and the previous one will be repaired. Assumed selected section..

Note all this if its ur structural element that's is mis behaving

All said above are based on the picture I see solution may changes ..

Be guided professional builder's dear not alter a structural element without approval from the designer not to talk of expert mason

EgunMogaji2:
Engineering wonder. Not sure if it’s photoshop or even Nigeria.

If an Architect here can come out with a likely scheme for this we may check what design requirements will be OK for this..For everyone to know how achievable this is

Callmeboss:
At ODY FOODS we deliver all food stuff to you directly from the farmers

Red oil at #10,000 per 25littes.

I stay in Lagos so is transport included if no include logistic separately and what if am buying let's say 500ltrs will there b discount just as common sense or its flat rate