Project Title: Residential construction of a Mini Estate comprising 6 units of 4 bedroom duplexes with pent house

Project Location: Kugbo, Abuja

Contractor : Harneyprojects ltd RC 781615 ( www.harneyprojects.com)

Client : ********

Project cost: 750 million naira

The building approval was done in the office of the Federal Capital Developement Authority (FCDA) . The lead Engineer ( Engr. A.P Saliu ) being a Coren Registered engineer and also a member of the Nigerian society of engineers(NSE) made the whole process smooth

Anything building now for naija dey fear me o!

Work commenced on site, with the setting out operations one of the the units of 4 bedroom duplex plus pent house based on the site plan and foundation layout drawings.

zoeA:
Anything building now for naija dey fear me o!

No be to build be the koko, na to get competent hands to supervise your building and buy standard building materials be the main wahala.
Check out the Nairaland Post, the guy been explain the major causes of building collapse
https://www.nairaland.com/4466821/major-causes-building-collapse-nigeria#66946220

Excavation of the foundation trenches and colunm bases commenced after the setting out operation.
The colunm bases had varying dimension from 1200mm x 1200mm, 1500mm x 1500mm and 1800mm x1500mm

Reinforcement works
The structural design indicated the use of 20mm diameter rods for the colunms and 12mm diameter rods for the colunm bases.

Make I siddon look

abuuthmaan:
Make I siddon look

Welcome sir, Enjoy the show

Pad Base and Strip Base concreting.

The layman term for this phase of work is Blinding.
The Strip foundation that would carry the load of the foundation blockwork, dpc and ground floor blockwork has a depth of 225mm while the pad foundation that would carry the colunms, beams and slab has a depth of 350mm.
The concrete was mixed with a concret mixer and placement done with labourers. The concret had a mixed ratio of 1:2:4 ( One bag of cement : four head pan of sand : eight head pan of gravel) according to BS/NS code specifications.

Foundation Blockwork
The block work commenced 2 days after the concrete works of the pad and Strip
The blocks were laid in accordance with the foundation layout drawings.
Due to the depth of the foundation and carrying levels of the pad base, grade beams with depths of 300mm were introduced
The foundation blockwork was filled with concrete.

Laterite filling / Hardcore and Damp proof membrane (DPM) placement
Laterite filing and compaction of the filling with a mechanical compactor was done after completion of the blockwork.
After which hardcore and DPM were put in place.
The placement of DPM is a regularly neglected phase in the building construction industry in Nigeria, failure to put the DPM before casting of the damp proof floor (DPC) would allow rise of moisture through the foundation block work leading to damage of screeding and painting layers.

Damp proof course (DPC) formwotn and concrete placement
The DPC formwork was done with combinations of 1''x120 planks and 2'' *4'' Wood for bracing and concrete placement was done to a mixed ratio of 1:2 :4.

#KugboBuild Foundation construction Video

https://www.youtube.com/watch?v=NdAr6_Xct08

Ground floor construction

This involves ground floor blockwork, lintel/colunms formwork, lintel ironwork and concreting.

Ground floor construction.....

After completion, we proceed to First floor slab/Beam construction commonly called "decking"

All structural first floor beams have a depth of 450mm.
The structural reinforcement specifications is 3Y16 top, 3Y16 bottom with shear reinforcement spaced at 200mm C/C

Formwork placement for the first floor slab and beams...

Reinforcement works and formwork

Reinforcement works

First floor slab and beam concreting
The concrete was mixed in ratio 1:1:1:4
1 bag of cement, 2 head pan of sharp sand, 2 head pan of stone dust and 8 head pan of gravel.

Concrete Curing activities

Well done

Horlardorjah:
Well done

Thank you sir

From sunrise to sunset
#KugboBuild

Harneyprojects:
Reinforcement works
The structural design indicated the use of 20mm diameter rods for the colunms and 12mm diameter rods for the colunm bases.

Are there circumstances where 12mm can be used for both the bases and the columns?

Hatesin:


Are there circumstances where 12mm can be used for both the bases and the columns?

The reinforcement to be used is dictated by the structural design done by a structural engineer.
Its might be possible to have 12mm rods in your ground floor columns for structures with little load specifications.
But I do not trust the yield strength of Reinforcement sold in the Nigerian market, so i wont recommend having 12mm rods in colunms for building greater than 1 floor. The BS code specifies a strength of 460N/mm2 but Nigerian reinforcement have been found to have less than 390N/mm2.

First floor blockwork

Well done

DankemzI:
Well done

Thank you sir