Estimation & costing of barbed wire fencing for a land./ Calculating the number of RCC poles for fencing a land. (part 1)

 Let us consider a land of size 50ft. × 80 ft., that should be fenced using RCC poles and barbed wires.

Here, L = 80 ft. & B = 50 ft. 

 We will consider purchasing an RCC fence pole of size 6 ft.× 4 inches × 4 inches and 12 gauge barbed wire to complete this work.

Let us install this fencing pole at 8 ft. c/c distance as shown in fig. below.

First, we will calculate the number of poles required to cover this land.

Number of poles on the longer sides of the land

     = 2 sides ×(( length of the land  ÷ c/c distance between the poles) 

     =2 × ( 80 ft. ÷ 8 ft.) 

     = 2 × 10 

     = 20 nos.

Similarly, the number of poles on the shorter side of the land

      = 2 sides × (( width of the land ÷ c/c distance between the poles) 

      =2 × (( 50 ft. ÷ 8 ft.) 

      = 2 ×( 6.25 )

      = 12.5  nos.

By rounding up the no. of poles.

     = 12 nos.

When we divide 50 ft. by 8 ft., the remainder will be 2 ft. So instead of taking extra poles, we can distribute this extra distance between these 6 poles of each side.

C/C distance of poles on the shorter side

      = 50ft.÷ 6 ft. 

      = 8.33 ft. ( as you can see in the above fig.)

We need 2 poles at all 4 corners of the land to support the end poles from bending due to wire tension.

So, the number of poles = 2nos. × 4 corners

                                      = 8 nos.

Total number of poles required

        = on the length side + on the width side + supporting poles

       = 20 nos.+ 12 nos. + 8 nos.

       = 40 nos.

                                                                                                                       Continued  👉 Part 2

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