I agree that this is a "means and methods" issue and many engineers have the same opinion. However, I feel this will benefit everyone in the long run. If I put this on the fabricator/contractor it will most probably not be paid attention to. Then when I get in the field everything is sagging and...
REQUIRED: I am looking for a written publication or a consensus on this issue.
As an example take a 48" wide concrete beam. The shear in the beam requires the use of only 2 shear legs. Given a large number of top bars the top horizontal leg of the stirrup will want to sag due to the weight of...
We have designed more than a few bank vaults and rather simply. Using common sense and judgement. 12" thick CIP walls with #6 reinforcing bars at 6" o.c.e.w.. Then had the layers offset from each other 3". Creating a 3" grid.
I resolved for the baseplate area and the actual bearing pressure using the entire baseplate. Solved for the distance beyond .95D (m) and got my plate length.
I plan to cut back the plate and put a 1/2" header plate to keep the plate rigid on the edge. Close enough to hide in the wall...
In following your suggestions it appears that the base plate length can be reduced significantly but still requires stiffening as the plate alone is not thick enough to handle the bending stress. I did have to make one large assumption. It so happens that the side requiring the modification has...
Given: A steel 14" WF column within a 1960's 5 story steel framed structure welded to a 2" thick, rather narrow (14") and very long (60") base plate. The existing drawings indicate a triangular gusset plate extending out from the column flanges to keep the base plate from bending. This column...
Thank you for your replies. They were helpful in working with other parts of the structure. In the end a testing lab was highered to perform an analysis (more like an observation) of the deck and found that it appeared to be in adequate condition. Thanks again.
The deck has the grayish color of the galv coating, however the amount of corrosion ( along a 10'+ length) tells us it is only painted. If the contractor were to clean it up as best as he could, and there ends up being some left over this could hurt us down the line. A chance we are not willing...
In a recent site observation I noticed some rusting on the underside of an existing metal deck. The existing roof system is 5" concrete(overall thickness) over an unknown metal deck thickness. Our office is taking the stance that without proper testing of the deck it would need to be replaced...
KCS joist tables post a value for the maximum shear capacity for that joist. Is this the max load the joist seat can take? If not, is there a smart way of determining the extra compressive force that the seat angles can take? This question is in regard to a standard 2 1/2" seat depth. The system...
