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Re: Top Running Crane Beam New to Existing Connection

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Mark,

I've done this a few times too with 100% success; but most of my cranes have been under 10 Ton Class A or B. For the cost of a 25 Ton Class D crane I don't think I would be too concerned about wasting 3' cantilever of runway beams. I think you should do what you consider the "best" solution and not spend too much time looking for a "good enough" solution.

That said, you might consider a beam splice something like one foot from the column.

Respectfully submitted,

H. Daryl Richardson

----- Original Message ----- From: "Gary Hodgson & Associates" <ghodgson(--nospam--at)bellnet.ca>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, August 11, 2005 5:34 AM
Subject: Re: Top Running Crane Beam New to Existing Connection


Mark,
I have used your 4 angles (rwy lasted 25 years until it
was taken down and relocated) and I have used just 2
plates on the web-welded to one beam and bolted thru
slotted holes on the new beam.  I recommend putting
something at the top flange also to take the transverse
loading.
Gary

On 10 Aug 2005 at 17:59, Mark Puccio wrote:

I am in the process of designing a new independent top running crane
system which is an extension of/connecting to an existing crane
system. The crane is class D 25T. The existing crane beams are
two-span continuous with the end bay beam cantilevered 3 feet past the
support. We want to position the first new support a typical bay
spacing (25') away from the nearest existing support member. To do
this I am considering attaching the new beam via 4-framing angles and
short slots. I have checked the implications of this on the existing
member from a beam design stand point. The other option would be to
have the ends of the existing beam field cut off and span the new beam
to sit on the existing column. This second option is less desirable
from a cost stand point.



I would like to hear some of your opinions regarding using an end to
end connection for a crane beam application.





Mark

mpuccio(--nospam--at)mpsqrd.com









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