₦airaland Forum

chizobadavis:
just came back from voting. I collect PDP 500 naira, voted APC for presidential, APC for senate, PDP for house of rep, cos house of candidate brought the transformer we are currently using now in my area. Onitsha North LGA

You are on point bro

Wow what an empty street... Port Harcourt is a ghost city at the moment.... All we want is change

jfkenny:
Thanks and do justice to these:
1.What is the correct cement :sand mix for laying blocks.
2.I always read 1:2:4 as standard for concrete mix but I have not seen the builders implement such. what I normarly is 1 bag of cement:8head pans of sand :10headpans of stone. Or sand and stone will be made equal 8:8.
Thanks and b blessed.

In order to achieve a minimum concrete strength of 25N/mm2, a mix ratio of 1:2:4 ( 1bag of cement to four head pan of sand and 8 head of gravel. The sand most be clay free, The gravel must be retained on 20mm sieve. Water for the mixture must be drinkable and water to cement ratio can either be 0.45 or 0.55

Note the following:
1. The more the water content of a concrete the weaker the concrete
2. Most of concrete strength comes from the coarse aggregates (gravel)
3. Cement serve as a binder
4. Sand help to filled the void space between gravel and increase the volume of concrete

The correct mix for laying blocks is 1:6
One bag of cement to 12 head pan of sharp sand
.

olaxco2f:
Irrespective of who wins Saturday's election we still won't have 6,000 megawatts of electricity by 2019.
There will still be at least 2 ASUU strikes before 2020, garri will still never be sold at 20naira per derica, ponmo will still be cheaper than beef, your landlord will not reduce his rent,
your salary will most likely remain the same for another couple of years, I will still have to pay for electricity that I'll never get to use, MC Oluomo will still control Oshodi, DSTV will not
reduce monthly subscription, MTN will not give you FREEBIES without hidden charges, the list is unending, but one thing is super certain, your
hustle will always put food on your table. Just vote, don't impose your opinions on us, GEJ is a Wolf, BUHARI is a Lion, even we sef we no be Sheep, we are a lawless lot. Irrespective of who wins, just give me PEACE cos I need to go out on Monday and get my daily food. God bless U as U vote!

Nigeria can generate 10thousand megawatts of electricity

jfkenny:
Good morning Op.i Am late to class hope u can reply my question .Good practical class, may god bless you the
more ..amen..

amin sir...provided I can provide. reasonable answers to them.... you are welcome

micbjrex:
Thank you but what about materials for doors and window
From your post, I understand that I will need 20 rods for the longitudinal pillars, 15 links.....i dont get that part, please help break that down in layman's term, 12 bags of cement, 1 ton sand, 3 ton gravel

then for the 2 arcs, i need 3 rods, 2 bags of cement, 1 bar of Y8 rod, then use from the above sand and gravel.

please, help do the math for pillar base mat and doors and windows too..thanks

I mean u need 15 no of Y8

meccuno:
before you do that,maybe we should make anambra state the FCT for 20 years then after that,we can tell all the igbos to go back and the yÓrubas to come back to the SW......deal?

Lagos was an independent colony for years before the stupid British amalgamated big for nothing Nigeria
Lagos was a centre of learning, commerce and advancement when some dude in remote south eastern Nigeria were killing each other for launch.

Lagos is a pride of the Yoruba race because yorubas decided to live in community with rule of laws

Yomieluv:
Ethnicity,the bane of our problem,and under-development...

Nigeria will never be one,if this continues..

Jonathan started the religious bigotry card by going from churches to churches kneeling down like a clown....
He started the ethnic card by indirectly marginalizing some section of the country because he felt they were not important...

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =N14,400

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =[b]N14,400[/

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =N14,400[font=Lucida Sans Unicode][/font]

Onuokwu:
Can we see the plan and 3D, if any, for this school block so that we know what to look forward to.

I will upload the plan view and the elevations tomorrow.... as for the 3D, I am not sure If I can lay my hand on any but before we finish the job I will do a 3d of the school

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the columns
the height of 6'' block is = 225m
15 courses = 15 x 225 = 3375mm
assuming a thickness of mortar of 2omm = 20 x 15 = 300mm
total height of column = 3375 + 300 = 3.675m

column reinforcement length = main height ( 3.675) + bottom anchorage ( 0.15) + top anchorage (0.15) = 3.975m
y12 length is 12.3m, No of bars = 12.3/4 = 3bars

Bar required per column = 4
total Number = 4 x 15 = 60
No of bars required = 60/3 = 20bars for the longitudinal reinforcement

for the rings using Y8 and spacing of 300mm c/c
length of links for a rectangular column of 225 x 150 ( due to the 6'' side) and allowing for cover of 20mm
L= 900mm
Number of links in a column with 3000mm spacing = 13 links
No of L in one length of bar = 12.3/0.9 = 13links
Total number of Y8 required for the link = 15Y8



for the concrete
volume of concrete = 0.225 x 0.15 x 4 =0.135m3/column
total volume of all the 15 columns = 0.135 x 15 =2.025m3
using a mix ratio of 1:2:4
part of cement = 2.025 x 1/7 x 1506/50 =9bags of cement ( use 12 bags allowance for shrinkage and wastage)
part of sand = 2.025 x 2/7 x 1.6 =1tonnes of sharp sand
part of gravel = 2.025 x4/7 x 2.4 = 3tonnes of gravel

summary for the column reinforcement
s/n Descriptions Quantity unit rate amount
1. Y12 20 Nr N1,200 N24,000
2. Y8 15 Nr N800 N12,000
3. Dangote cement 12 bag N2,000 N24,000
4. sharp sand 1 tonne N 3,00 N3,000
5. Gravel 3 tonne N 8,000 N24,000 ( port Harcourt price)


6. workmanship N36,000
Total = N123k ( minus the cost of formwork)

2fine2fast:
With out without Olanusi, Ondo North which comprises of my hometown and Akoko land is for GMB.
Anyways welcome Alhaji Olanusi
Sai Buhari.

I am Akoko/suleja and I am for Buhari all day Sai baba

The 3D is fine but I observe the following
1. The pad footing is inadequate
Land in ondo and it's environs have a bearing capacity between the range of 150 - 200kN/m2.
With this bearing capacity you need a pad footing of minimum 1200mm x 1200mm for the duplex.

2. The depth of the foundation is inadequate
Foundation depth is a function of groundwater and soil conditions. A duplex should have a minimum depth of 900mm to the surface of the strip supporting the foundations wall

3. The thickness of the pad can be a minimum of 300mm while that of the strip carrying the foundation wall can be 150mm since the load is carried by the column in a frame building

micbjrex:
Thanks for this info. Is the trip of sand 5 ton or 10 ton? I want to ask you how many trips of 5 ton sharp sand can set (not mould) 5000 blocks? Thanks

A bag of cement will set 60blocks using a mix ratio of 1:6.
You need 83bags of cement for the 5000blocks
You need about 25tonnes of sharp sand to lay the block

Wow nice building

Block moulding
1. One trip of sand
2. 30bags of cement
3. N800/bag to mould the block

We actually get 30blocks/bag and we get 30bagsper each trip of sand

Total blocks per trip of sand = 900blocks

The block is stronger and cheaper by N50/block

After many disappointments by suppliers will started moulding blocks ourself

More

Septic tank

Pics

There have been some delay due to need to increaase the dpc level

engrgordon:
thanks for your concern my proffessional coleague,hope the work is moving smoothly well.

yes sir

engrgordon:
good job going on here, Kudos..... I love my profession........ Can part of the project be sublet to me? DOUBLE INTEGRATION MULTI-PROJECTS SERVICES(DIMS) , WE BASED IN PORT HARCOURT.

when there is need to involve the service of a sub contractors we will surely get in toucch with you sir..thanks

mufutau55:
Welcome back.. I know you have been very busy, so I decided not to bother you..
How is our new girl and the Mummy.. Congrats.

Hajji M.

They both great sir....thank you sir..how is work sir?

my question is what is the percentage of Nigerians that are earning 50k and above?

is marriage a form of employement or lottery for women?

In a country where more than 60% of the population are unemployed, poor etc and where minimum wage is less than 30k... getting a basic salary of 50k /month is not a bad thing

Dieumerci:
Welcome back sir, eku ewu omo. Olohun abawa wooo!
Let the lectures begin.

thank you sir

foundation footing
summary

foundation footing
1.thickness of footing = 225mm
2.bags of cement = 380bags
3.trip of sharp sand = 6
4. gravel = 120tonnes

1. No of column type A = 157
size of column type A = 225 x 225mm
2. No of column type B = 450mm diameter column

block work
1.quantities of block = 8500
2.cement = 140bags of cement

it has been a while on nairaland for me...I am back for more update.

pics

excavation work.
depth of excavation = 900mm
width of excabavation = 675mm
calculated perimeter of excavation =880m
rate of excavation = N500/m
expected duration of excavation assuming 40 labourers with capacity of 15m/ day
= 880/(15 × 40) = 1.48days.

actual excavation
perimeter of excavation = 860m( very close to the calculated perimeter)
duration of excavation : it took us two days to complete the excavation. the work was completed 2.0pm the next day.

cost of excavation = 500 x 860 = N430, 000
logistics = N15, 000
total = N445, 000