Bending moments-Antenna Wind loading - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

Robbo · 04-12-07, 01:27 PM

Just found some very useful information on the
Kathrein website, regarding the wind loading caused by an antenna, and the resultant bending moment on the pole.

Basically multiply the given Windloading (N) by the height of the pole above its fixing point.

Eg for Kathrein CAS75 windloading =480.
say pole height = 1m

The bending moment = 480 Nm,

The windloading figure given by Kathrein for its products is for the equivalent of 129kM/h wind speed (force 12)

This value must not exeed the maximum bending moment that the pole can take,

Link to page:-

http://www.kathrein.de/en/sat/tinfos/download/TA-60.pdf

Robbo

scopx · 09-02-08, 01:05 PM

Am somewhat familiar with "bending moment" when a 2&1/2 ton pickup truck I was moving came unhooked from the tractor and decided to follow gravity down the slope! The 10' dish was mounted high off the ground and cleared the front fenders but flexed as cab passed under. immovable object (30inch diameter tree) finally stopped wayward pickup.

Tom

04-12-07, 01:27 PM	#1 (permalink)
Robbo Satellite mad Join Date: Jul 2007 Location: Kent Posts: 9,230 Thanks: 93 Thanked 1,967 Times in 1,590 Posts	Bending moments-Antenna Wind loading Just found some very useful information on the Kathrein website, regarding the wind loading caused by an antenna, and the resultant bending moment on the pole. Basically multiply the given Windloading (N) by the height of the pole above its fixing point. Eg for Kathrein CAS75 windloading =480. say pole height = 1m The bending moment = 480 Nm, The windloading figure given by Kathrein for its products is for the equivalent of 129kM/h wind speed (force 12) This value must not exeed the maximum bending moment that the pole can take, Link to page:- http://www.kathrein.de/en/sat/tinfos/download/TA-60.pdf Robbo __________________ القمر الصناعي هو أفضل TM600 linux,TM6800HD,TM5200,TM1000,TM2200 motor, Triax TD110 dish. Electronics Engineer and satellite installer.MBC Satellites Last edited by Robbo; 04-12-07 at 01:34 PM.

09-02-08, 01:05 PM	#2 (permalink)
scopx Junior Member Join Date: Feb 2008 Posts: 27 Thanks: 0 Thanked 2 Times in 2 Posts	Re: Bending moments Am somewhat familiar with "bending moment" when a 2&1/2 ton pickup truck I was moving came unhooked from the tractor and decided to follow gravity down the slope! The 10' dish was mounted high off the ground and cleared the front fenders but flexed as cab passed under. immovable object (30inch diameter tree) finally stopped wayward pickup. Tom