1. FOUNDATION ELECTRIC POLES
PRESENTATION

2. Pole Foundation:- Foundation:
Foundation is required to support structure for transmission tower, lighting poles, and transformer erection etc in the field of electrical engineering.

3. For foundation of single wooden, concrete or steel pole, the pit is excavated to a required depth. Precast concrete poles or steel poles are inserted in the pit.
Concrete mixture is poured layer by layer and is rammed every time. Mixture ratio is normally 1:2:4 of cement: san: stone.

4. Depth for foundation is generally 1/6 Th of the length of pole.
Typical depth of foundation pits are as follows:
                              
Pole size (meter):            12        15         18
Depth of foundation: 1.5     1.7          1.8        1.8          2
Depth for foundation is generally 1/6 Th of the length of pole.

5. Location of poles:
Poles are located at least 1.5meter away from fire hydrant, underground cable trench, and 5meter away from road boarder and railway

6. Height of the pole in distribution system-
10M, 12M, 14M
Span of the pole:
Residential area: 30 to 50m
Rural areas        : 50 to 60m

7. Foundation for 9 meter street pole :-
a)  Lean concrete ratio-1:3:6 (cement: sand: stone)
Volume:  0.7X 0.7X0.15 = M3
Cement required per M3= 220kg
Cement for above volume= kg

8. b)   Pedestal PCC at ratio 1:2:4
Outer dia =0.540M
Inner dia= 0.15M
Height = 1.5M
Volume = π/4 x (D2-d2) x H
             = π/4 x ( ) x 1.5
             = 0.321M3
Cement required for ratio =320kg per M3
For M3 volume cement required = 320 x = kg

9. c)  Copping ratio 1:2:4
Outer dia =0.30M
Inner dia= 0.14M
Height = 0.3M
Volume = 0.021M M3)
              = 0.017M3
Total cement consumption per pole =a+b+c = = kg

10. Earth pit chamber:
Plaster 1:4 cement =5.47kg/M3
Brick masonry 2x0.6x0.45x0.115=0.062M3
                       2x0.3x0.45x0.115=0.031M3
                                       
                                           0.093M3
Cement consumption: 0.093x95=8.835kgs
Plaster 4x0.3x0.45 = 0.54M3
            4x0.6x0.1 = 0.24M3
            2x0.3x0.15 = 0.09M3
                                
                                1.05x5.47 = 5.749kg
Total cement consumption
  For one earth pit chamber = 14.58kg

11. FOUNDATION OF FEEDER PILLAR & TELEPHONE DB
1. Lean concrete: 1:3:6
Cement 0.11x 220kg/M3
2. Brick work = 2x1.0x0.5x0.075= 0.075M3
                        2x0.5 x0.35x0.6= 0.21M3
                             0.9 x0.5x0.3 = 0.135
Total                                          =0.42M3
Cement = 0.42x95kg/M3 (1:4 mortar)
                 =39.9 kg
3. Plaster 12 mm thick
0.9 x0.3x2 = 0.54M2
    Total  = 0.84M2
Cement: =0.84x547kg/100M2
                =4.6kg
4. Neat coat for area of 0.84M2
Total cement for one foundation = 70kg

12. Foundation of post top fixture
a)      Lean concrete ratio-1:3:6 (cement: sand: stone)
Volume:  0.7X 0.7X0.15 = M3
Cement required per M3= 220kg
Cement for above volume= kg
b)      Pedestal PCC at ratio 1:2:4
0.5x0.5x0.1 = 0.25M3x320 =80kg
Height = 1.5M
Cement required for ratio =320kg per M3
c)      Copping ratio 1:2:4
 0.3x0.3x0.045x320=14.40kg
Total cement consumption per pole
=a+b+c = = kg

13. THANK YOU
THE END