Light Pole Foundation Design 8.0m Height B L Size of footing = 0.6 X 0.6 m Overturning moment = 10.65 kN.m h = 8.00 m P = 1.33 kN Weight of the pole = 2.75 kN (approx) Height of footing above ground = 0.15 m Take D = 1.55 m Check the depth of embedment required by IBC-09 IBC09 eq. 18-1 ) 36 . 4 ( 1 1 ( h A D Where b = diameter of round post or footing or diagonal dimension of square post or footing D = depth of embedment in earth in feet (m) but not over (3658 mm) for computing lateral pressure. ) ( 1 1 ( 2 A D b S p A . 1 . 34 . 2 h = distance in feet (m) from ground surface to point of application of ‘‘P.” P = applied lateral force in pounds (kN). S1 = allowable lateral soil-bearing pressure as set forth in Table 1806.2 based on a depth of one third the depth of embedment (kPa). b = 0.849 m From table 1806.2 lateral bearing 31.400 kPa per meter@3000psf (equivalent to 150kPa) footing vertical allowable pressure S1 16 223 kP S1 = 16.223 kPa A = 0.226 D = 1.52 m ok Summary Take D = 1.55 m Mmax = 10.7 kN.m Mu max = 16.0 kN.m N" lf t t" Fl l i ht+( t ff ti t f il) N "normal force at max moment" = Flagpole weight + (wt of footing-wt of soil) 2.75 + 4.32 N = 7.07 kN Nu = 10.61 kN

Deep Foundation Design-IBC 8.0m

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Light Pole Foundation Design 8.0m Height

B LSize of footing = 0.6 X 0.6 mOverturning moment = 10.65 kN.mh = 8.00 mP = 1.33 kNWeight of the pole = 2.75 kN (approx)

g g g

Height of footing above ground = 0.15 m

Take D = 1.55 m

Check the depth of embedment required by IBC-09

IBC09 eq. 18-1)36.4

(11(hA

Where

b = diameter of round post or footing or diagonal dimension of square post or footingD = depth of embedment in earth in feet (m) but not over (3658 mm) for computing lateral pressure.

)(11(2 A

.34.2

h = distance in feet (m) from ground surface to point of application of ‘‘P.”P = applied lateral force in pounds (kN).S1 = allowable lateral soil-bearing pressure as set forth inTable 1806.2 based on a depth of one third the depth of embedment (kPa).

b = 0.849 mFrom table 1806.2 lateral bearing 31.400 kPa per meter@3000psf (equivalent to 150kPa)

footing vertical allowable pressureS1 16 223 kPS1 = 16.223 kPaA = 0.226D = 1.52 m ok

SummaryTake D = 1.55 mMmax = 10.7 kN.mMu max = 16.0 kN.mN " l f t t" Fl l i ht + ( t f f ti t f il)N "normal force at max moment" = Flagpole weight + (wt of footing-wt of soil)

2.75 + 4.32N = 7.07 kNNu = 10.61 kN