CRACKED COPES IN BEAMS
CRACKED COPES IN BEAMS
(OP)
DOES ANYONE HAVE ANY EXPERIENCE WITH COPES BEING CRACKED IN GALVANIZED BEAMS?
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RE: CRACKED COPES IN BEAMS
Have the beams been loaded yet or are you seeing these cracks just after the galvanizing? If loaded, what is the loading and is it repetitive/dynamic? What is the radius of the cope?
RE: CRACKED COPES IN BEAMS
AISC should be able to provide you with a reprint of this article. Their technical support folks may also be aware of more recent information on this topic.
RE: CRACKED COPES IN BEAMS
AISC's Engineering and Research department issued the bulletin and form.
RE: CRACKED COPES IN BEAMS
1. Grind the galvanizing off.
2. Prepare a small U-groove on one side of the web.
3. Fill this groove with 7018-A1 weld metal with
approximately 1/8 reinforcement.
( If you are in a colder region preheat may be
required)
4. Backgrind the crack on the other side of the web
to good new weld metal with the same U-groove.
5. Perform Dry Magnetic Particle inspection to
verify complete removal of the crack.
6. Again, fill this groove with 7018-A1 weld metal.
7. Grind the reinforcement back to the original web
thickness and perform Dry MT again as a final
check.
This solved our crack problem. As far as I know there is no documentation to support at which phase of production is causing the cracking whether it is the coping operation or the galvanizing operation. Our beams came from 8 different countries and 3 suppliers. We were able to eliminate a single manufacturer as the culprit and that was about it.
I hope this information helps.If you have any pictures I would love to see them. email to rschram@pharmacia.com
RE: CRACKED COPES IN BEAMS
1. Strip off galvanizing
2. Drill hole at end of each crack
3. Sawcut out cracked areas
4. Bevel edges
5. Dye test edges to verify all cracks have been removed
6. Fill with suitable weld material
7. Grind all edges and surface smooth
8. Mag test finished welds
9. Recoat degalvanized areas.
I was not directly involved nor do I know how it turned out, but was interested.
RE: CRACKED COPES IN BEAMS
RE: CRACKED COPES IN BEAMS
If anyone has this report, I'd be curious to know what their findings were.
RE: CRACKED COPES IN BEAMS
On one project in the Uk out of 120 areas inspected 83 has cracks. One extended for 850mm, 0r >33". The most serious cracks are not visible and can only be located by NDE. This problem needs greater appreciation and more publicity.