What cannot be welded, can be riveted, bolted, swaged, glued
or wedged in place. Depending on the hook size, a hollow bolt or
rivet, or high tensile bolt(s) or rivet(s) might be needed.
Brian Whatcott Altus OK
Talk to people that construct skyscrapers. They use "hot rivets" all
the time. You are not going to find these at a hardware store, but
you might try a steel supplier.
David A. Smith
Hmmmm..this maybe one of your first jobs? I don't have
DIN 15404-2 for laminated lifting hooks, but crane hooks
had better have generous margins of safety.
It seems to me that if you are intended to design the laminae, you
may well be called on to design the rivet(s) too, assuming they are
really intended to be 2 inch diameter. Designing a rivet ought not to
be overwhelming. One could be forged, even turned from suitably
malleable material that will meet the shear requirement.
I have this feeling that even big steel riveted hulls use smaller
diameter rivets than these.... It couldn't be 2 cm diam rivets, I
don't suppose? DIN is a European - initially German spec, after
p.s. For laughs, do tell us the limit working load this hook is
intended to lift please?
I just have the design of the purchaser, and he want the hook built in
that way. My problem is just to recruit the rivets designed by him. I
know that maybe they are exagerated, but only if I can't find them I
can tell to the purchaser/designer to choose another way. The SWL is
140 ton. (I always designed lifting lugs for SWL 500 ton. and I used a
100mm hole...). Anyway, my problem is just to make buildable the
design of the hook.
PS: 50 mm is about 2 inches, not 2 cm.....
Hmmm...this sounds rather like a student project. People don't usually
design rivet dimensions out of the blue. May I humbly suggest you take
great care over whatever the specifier has suggested? If you are, or
want to be an engineer, a mis step with a crane lifting block would be
a great pity. Sorry I cannot help more.
Brian Whatcott Altus OK
Brian, I think you haven't read with enough attention my posts or
maybe my english could have some problem.
Anyway: this is not a student project. I must BUILD this hook. I have
the drawing, and the drawing has 50 mm holes. If the customers wants
the hook in this way, the problem is of him. I haven't his calculation
report. The problem is mine just if I can't find the rivets. But if I
find the rivets and the rivets are overdimensioned.....I must connect
the plates and stop. Sorry, I cannot be clearer. Thanks anyway.
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