*
I’ll bet your engineer we’ll probably say to just drill new holes. Near the ends of the beam, the flanges experience very little stress (i.e, little compression in the top flange, nor tension in the bottom). The flanges do the most of their work near the center of the beam At the ends, the bottom flange does help carry the weight, but you said in your case the misplaced holes were in an area not bearing on the cap.
Note that near the ends, there is alot of shear in web (vs. none in the middle of the beam). So you don’t want to fool w. around with the webs in that area.
Replies
*
I'll bet your engineer we'll probably say to just drill new holes. Near the ends of the beam, the flanges experience very little stress (i.e, little compression in the top flange, nor tension in the bottom). The flanges do the most of their work near the center of the beam At the ends, the bottom flange does help carry the weight, but you said in your case the misplaced holes were in an area not bearing on the cap.
Note that near the ends, there is alot of shear in web (vs. none in the middle of the beam). So you don't want to fool w. around with the webs in that area.
*
As a PE, if presented w/ this prob;em, I would be amenable to either, drilling new and plugging old or, preferably, putting incorrect holes at top of beam.
*
I'm replacing 14' of bearing wall with a W6X25 steel beam on 3-1/2" steel columns. A 6"X7"X3/8" plate is welded to the top of the column with holes for bolting to the beam flange. (All of the above was engineered).My problem is that the fabricator missplaced the holes in the beam flange. He has offered to do whatever it takes to fix this - just drill new holes or drill new and plug the old or drill new and add a web stiffener. When the beam is positioned correctly on the column the old holes (2@7/16" dia.- one ea. side of the web) will be about an inch past the edge of the cap plate.
While I'm waiting for a reply from my engineer I'm hoping that some of the PE's that frequent this board might have some input. Are the extra holes in the flange significant? Is there any benifit to turning the beam so that the missplaced holes are on the top flange? Am I worried about nothing??
TIA,
Jerry
*Doesn't seem like a problem, your contractor has several solutions, you are running the solutions past your engineer. Holes in the wrong place, he cuts new ones and fills in the old ones, Engineer gives his casual bessing, case closed.Hope your project is going well, you seem to be on top of it.
*
Thanks to all for the replies! It's my first time working with steel so I guess I was looking for some reassurance (besides that of my engineer). You guys were right on; I was worried about nothing. FredO: Your explanation helped by expressing clearly what I suspected Intuitively. FredM: You're suggestions agree with my engineer's. As Gabe said, "Case closed".
Thanks,
Jerry