Street Light Design

FOUNDATION DESIGN OF 6M TAPPERED CIRCULAR DECORATIVE STREET LIGHTING COLUMN 1) DESIG DES IGN N PARAMET ARA METERS ERS

Assumptions only to be verified by site investigation Soil Type Type =1 (sand)

φsoil =30 degree ( for sand)

γsoil = 2 !"#m2

$soil = 1%0!"#m2

f $ = 30"#mm2

f y = &0 "#mm2

2) APPLIED APPL IED LOADS LOAD S

'rom pole design by modal analysis = 2*!"m

+=0%!"

from base plate design number of bolts =  , d bolt=2mm , diameter  bolt group =3111mm - bolt=  base#( .iameter  bolt group#/2) = &13* !" 3) CALCULATION OF SHAFT FOUNDATION DIAMETER DIAMET ER

over =*&2 mm , olt dge .istan$e = 0% mm .iameter s4aft s4aft = .iameter  bolt group 5 2olt dge .istan$e 52over  .iameter s4aft s4aft = 0&m 4) CALCULATION CALC ULATION OF MOMENTS MOME NTS IN FOUNDA FOUND ATION BY BY USING BROMS METHOD For Cohes!e so" Applied Shear at Groundline including Factor Factor of Safety,VF = V (FS) , Factor of Safety =2 VF = 1.6K Applied !o"ent at Groundline including Factor Factor of Safety,V! = ! (FS), Factor of Safety =2 V! = #.$K" %e&uired %e&uired 'ength, ' = 1.#& *1+ 2  ($6)-& /.#0 ia"eter of Foundation,  =/.#6#" ro" 3oe4cient, & = V F-5c

64ere 1

c = Shear trength of cohei7e oil = 18/K-" 2 ro" 3oe4cient, & = /.//19

7 =oment # S4ear = #+ = + # +' = #1& = 33*m %e&uired 'ength, '=1.# (/.#6#) /.//19 : *1  + 2 (( $ : ;.;9#)  6(/.#6#)) (/.//19) /.#0 '= 1./18 " !a:i"u" !o"ent in the Foundation, ! !A< = V (   1.#  /.#&) ! !A