Harold,
Me too. I visited a pipe valve shop once and had my eyes opened by the
quality of the welds on the fittings, all from one side. On the other
hand, on one of my jobs, the contractor got a cheap price from an ASME
qualfied shop to do some structural work which is not allowed in Canada
unless they have also been approved by the Canadian Welding Bureau for
structural welding ( they weren't). A lot of the welds were terrible
and they had no idea of what structural connections were required.
Needless to say I kicked them off the job, despite great howls of
protest-"we have been welding X number of years". They just weren't
qualified or approved for structural.
This is not to knock them as pipe welders, just to say "to each his own".
Gary
Harold Sprague wrote:
> Your uncle belongs to a class of welders held in high regard among
> those who make sparks. Pipers and millwrights can weld much better
> than structural welders. The root weld on pipe is a gap in a bevel
> weld that has no backer. The welder moves his arc back and forth with
> no backing and his weld is a vertical weld transferring to an overhead
> weld and the transferring to a down weld.
>
> If any of my structural welding friends gets a little too confident, I
> challenge them to weld some pipe. I certainly know my place and would
> never even try making a piping weld. I am not worthy.
>
> Regards,
> Harold Sprague
>
>
> From: akester@cfl.rr.com
> To: seaint@seaint.org
> Subject: steel studs on columns?
> Date: Wed, 23 Jan 2008 12:27:45 -0500
>
> While flying up to watch my poor Packers lose this last weekend, I
> saw some new steel framing at the Orlando Airport that made me
> curious. It looks to be a two story steel frame, perhaps moment
> frame on the second story to roof level. On the first story level,
> the wide flange columns had steel studs welded to them at maybe
> 12" o.c. to at least two sides of column. This appeared to be at a
> corner column. My only guess is they are going to tie into the
> column with a concrete tie column or wall and use a CMU or
> concrete wall for lateral bracing on the first floor. But I would
> think if this were the case the top few studs would see all of the
> force, that the column would not be stiff enough to transfer all
> of the force into the wall element very evenly.
>
> And per all of that talk on field welding... Talking with my
> uncle, a retired steam fitter, they weld huge steel pipes together
> with butt splice complete joint penetration bevel welds, in the
> middle of a Wisconsin winter, all of the time... These pipes carry
> water and steam and may not have the stress in them that a wide
> flange butt welded will have, but I think as structural engineers
> we don't have to be so scared of field welding if it is really
> necessary! (Though may avoid it when it is not necessary due to
> costs.)
>
> Andrew
>
> Andrew Kester, PE
> Principal/Project Manager
> ADK Structural Engineering, PLLC
> 1510 E Colonial Ave., Suite 301
> Orlando, FL 32803
>
>
> Climb to the top of the charts! Play the word scramble challenge with
> star power. Play now!
> <http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_jan>
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