[TowerTalk] torque tightening querry

Fri May 26 08:56:04 EDT 2006

If you have that much specific data, what does the manufacturer or engineer
that designed it say??

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of Naveed at Hotmail
> Sent: Friday, May 26, 2006 07:32
> To: towertalk at contesting.com
> Subject: [TowerTalk] torque tightening querry
> 
> 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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