Hi guys. Am a young man into construction works. Will be taking u guys along as I try finishing up the work.

Before I go into details. Lemme introduce myself.

Am by name Moses, a graduate of Building Auchi polytechnic and Futminna and recently rounded up my MSc in construction management from Ahmadu Bello university, Zaria. Am single and in my early 30s. Hope the young lads can learn one or two things from this.

This thread is open to constructive criticism. Am geographically mobile and ready to avail my services and expertise to those who may need it. Am competent in the following areas

***General building and civil engineering Construction.
(residential, commercial, industrial)
***drainage and culvert and mini damn constructions
***road maintenance, reconstruction and new
constructions
***surveying, valuation of work and prep of estimates
*** design and general consultancy

Pls avoid quoting whole write ups while asking questions or commenting. Once more. Make ur criticism constructive and professionally

Leggo guys

Like I earlier said. It is a RCC line drain of over half a kilometer. Proposed design is attached. I intentionally omit the exact location of work and other details cuz they are privileged information

First lesson will be how design are made or interpreted

Some contract will specify the total drain length, total cubic meter of concrete and allow u to design for the drain sectional area. This is done when site condition will impact the construction and end product. While others you will be given the cross sectional area and u are allowed to determine the depth and width of the drain while maintaining a minimum thickness of the wall.

In this case. A total cubic meter was given, total drain length and cross sectional area. The drain was agreed with the consultant team.

Take for example you are given a drain length of 800m and cubic meter of 288m3 with a cross sectional area of 0.36m2

What this means is that for every 1 meter of drain there should be 0.36m3 of concrete when u multiply the cross section by 1m length. This means total cubic meter divide by total length will give u concrete requirement per length both for base and wall.

Now we need thickness we can add together to give exactly 0.36m3 so as to exhaust all the quantities otherwise u won't be paid full.

Now let's do the sharing let's assume a base of 1m and thickness of 0.15m including blinding and wall of 0.7m and thickness of 0.15m also. This will give

Base (1*1*0.15) = 0.15m3
Wall (0.7*1*0.15)*2 = 0.21m3
Total. = 0.36m3

This is perfect design. With this we are sure of exhausting all cubic meter of concrete in the contract. Anything other than this will either mean under or over performance and u all know what that mean

Pls not this doesn't correspond with the design shown. Like I said, the presence work have some privileged information I wouldn't shared cuz of privacy issues. With this I guess u guys can design when faced with similar challenges

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