Building Contractor Secrets: February 2021

Friday, 12 February 2021

Cost of Fencing a Plot of Land (100 by 100) with Pillars

Because you've spent several hours looking on the internet for how to estimate a fence project, almighty Google or whatever search engine you used had finally brought you to this platform and today, you're going to learn how to calculate how many blocks to fence a plot of land and this time we're examining a plot of land measuring 100 ft by 100 ft.

cost of fencing a plot of land (100 by 100)



It is important to know the number of blocks required to fence a plot of land as this would help you know the amount of money to spend in the project and also help you avoid wasteful contractors.

Here at guardian constructors, Richard Nwachukwu Ensures his audience gets the right estimates and that's why he keeps dishing out useful tutorials such as this.

How many blocks does it take to fence a plot of land?

In order to successfully estimate the number of blocks required to fence a plot of land measuring 100ft by 100 feet, i may have to refer you to a previous post made over 4 years ago where we estimated the number of blocks to fence a plot measuring 100 ft by 60 ft.

From the post, we highlighted the steps necessary in order to be able to estimate the number of blocks for a fence project and even though we decided not to add blocks for pillars, we were able to achieve our goals.

Applying the same methods, we shall be estimating the number of blocks required to fence this new plot today!

First of all, lets ascertain total perimeter of the plot

How to Calculate the Perimeter of a Plot of land


In order to determine the perimeter of a plot of land, it is necessary to know the dimensions of all 4 sides of the plot of land under review.

Well, from the survey plan submitted, we could understood the plot of land measures 100ft by 100ft.

To ascertain the total perimeter of the plot, we would have to add these all up!

Perimeter of a Plot of land

The plot of land measures 100ft by 100ft. This means the total perimeter would be obtained by multiplying each side by 2 and then summing it all together to get a figure.

Length of Plot = 100ft
breadth of plot = 100ft

Perimeter = 2(Length of plot + Breadth of Plot)
This gives us 2(100 + 100)
=> 2 x 200 = 400ft

Thus, the total perimeter is 400ft


For easy calculation, we may have to convert this 400 feet to inches.

How to Convert from feet to Inches

In order to convert feet to inches, i suggest we Remember there are 12 inches required to meet a feet.

Meaning we shall multiply 400ft by 12 to convert it to inches

400ft x 12 = 4800 inches

Also remember that a full block measures approximately 18 inches

Now, in order to ascertain the number of blocks on each coach, we are required to divide 4800 (total perimeter to be fenced) by 18 (length of 1 block)

4800/18 = 266.6 blocks

Because we cannot buy half a block, we quickly assume a total of 267 blocks

The 267 blocks so obtained is the number of blocks that is required to cover round the fence.

This equally means you could multiply 267 blocks by the height of the fence which is easily measured by the number of blocks

So Assuming a client says:

I want the fence to be 10 Blocks high...

All you have to do is, multiply 267 by 10 to get a total of 2670 blocks

What about Pillars

Reading from what is the cost of fencing a plot of land measuring 100ft by 50ft with pillars, we realized there are 11.28 pillars for every 100ft provided the plot of land is located near a busy road and the client is accepting pillars at every 6th block along the walls

Based on this, we already know there are 4 sides here with the same dimension;

Sides A-B = 100Ft (11.28 pillars)
Sides B-C = 100Ft (11.28 pillars)
Sides C-D = 100Ft (11.28 pillars)
Sides D-A = 100Ft (11.28 pillars)

So in total, we have 11.28 x 4 = 45.12 pillars

Now since we are using Sandcrete pillars, we shall be providing 2 blocks for each pillars.

This means there would be need for an additional (2Blocks x 45.12 Pillars)

2 x 45.12 gives us 90.24 or 91 blocks

Therefore, there is need for 267 + 91 blocks for each course

This equally means for a fence that would be 10 blocks high, the client is to provide 

267 + 91 x 10 (3580 Blocks)

Where:
267 = blocks on each course
91 = blocks for pillars
10 = fence is 10 blocks high

Thus, the number of blocks required to fence a plot of land measuring 100ft by 100ft is 3580 blocks and this is the case where the fence it required to be 10 blocks high.

Cement Required to Fence a Plot of land

As we may have read on previous posts, it takes a bag of cement to completely bond 70 blocks (5 inches only)

Based on this, if we are to estimate the number of bags of cement to be purchased for the project, we would have to divide the total number of blocks (3580 blocks) by the number of blocks set by each bag of cement (70)

Thus, 3580/70 gives us 51 Bags of 50kg bags cement

Other Materials required to fence a plot of land


Headpan - The number of headpans would depend on the number of workmen and porters on site

Shovel - 4 Shovel is enough for the job. Even 3 shovels would do the job

Water - Have a water pump on site and ensure there is enough petrol or have a porter to fetch water for the workers

Wood - A few lengths of 2 by 3 plank for scaffolding

Boards - Have about 8 boards on site to enable workmen build their scaffolds should should be 1 by 12 boards (Hard wood)

Mixer - To enable workmen mix concrete for foundation (Manual labor could be used as well)

Budget for Other Materials - Strictly as agreed by the contractor and his or her client.


After ascertaining the various costs above, you can then be rest assured that your fence project can be well executed without wasting money buying excess block that will not be needed at all!









 


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