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[TowerTalk] torque tightening querry

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Subject: [TowerTalk] torque tightening querry
From: "Naveed at Hotmail" <>
Date: Fri, 26 May 2006 12:32:27 +0500
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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.  ?


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