BASIC WELD DESIGN

[grego50]

where can i found information for a moment resisting weld design?

i think my units doesn't work;
i have fv+fb=45 ksi
and i need to found out if a 6" sq. tube with weld all around will work!
do i need to use C=T= ? OR Fb allow. = 0.3x70x0.707x0.25 = 3.71 k/in
IF I PROVIDE 6" WELD : 3.71 x 6 = 22.2 k (THIS GIVES ME POUNDS AND I HAVE ksi ABOVE)
I KNOW IM DOING SOMETHING WRONG BUT DONT KNOW WHAT IT IS
PLS HELP

THANKS

 

[msquared48]

With E70 electrodesyou can Ger 900#/in/1/16th of weld. How is the weld being loaded?

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[grego50]

thanks for responding

i have a horizontal tube welded to a vertical column similar to the structures you see on the freeways where they show the offramps exits. i have a 28 psf wind pressure over an area of 145 sq. ft. = to a force of 4,060 #. An arm length of 28.5' that gives me a moment of 115,710 #-ft. total moments including weight = 177,698 #-ft

i apreciate any help

 

[hokie66]

As this is your first visit to this site, we have no experience of your competence or your ability to successfully carry out this design. This site is for exchange of information between design professionals, and if you were a practicing structural engineer, you would not be asking this question. Please seek assistance from a structural engineer in the real world rather than on-line.

 

[grego50]

Dear hokie66
when I joined this forum " engineering-tips", I was unaware it was restricted to practicing professionals only. My thought was every professional can join, including EIT's. I respect your opinion and I will seek assistance somewhere else.