What should be torque tightening for the bolts 0f 20mm and 16mm ASTM A36 , ISO
GRADE 5.8 bolts , of a lattice structure which is 60m high and has to resist a
wind speed of 150kph , lying in seismic zone IV , dead load in addition to self
weight is the feeder cables and ladder wieghing 0.22kn/m , 8 antenas weighing
23kg each, 4 microwaves wieghing 12kg each, having maximum allowable twist and
tilt to be +-0.45 deg.Can you please tell me the source atleast. ?
Regards
NAVEED IRSHAD
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