ASME has been defining crane safety since BTH-1 provides minimum structural and mechanical design and electrical component selection criteria for. Design of Below-the-Hook Lifting Devices by pvchabot. Documents Similar To Asme Bth Design of Below-The-hook Lifting Devices. ASME BTH Uploaded by. pvchabot · ASME BTH-1 Lifting Lug.
Subscription pricing is determined by: Hi JAE, Thanks for the reply. JAE, Still good advice, since I am doing the calcs in Mathcad to semi-automate the design, I am still going to check the section for it’s compactness, however there’s also a simplified clause for rectangular sections I will check out. In your case, I would see the b distance as the straight vertical edge to the base center of hole to base weld line.
I select the closest available Crosby G shackle for the load. Already Subscribed to this document.
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You’ll see that there is no criteria for checking whether the section is compact or non-compact. Almost invariably, pin bearing, shear and yielding in the area of the pin, and good quality welding detailing controls the design of lifting lugs.
Even then, I wonder about how much compression would even get into the lug with an angled hanging “tensile” load. Your Alert Profile lists the documents that will be monitored.
For a square plate, like your lug, local buckling is not possible. This standard is not included in any packages. I also need to determine this for a flexion analysis in the weak axis. For now, I am working on a single case and detailing the calculations.
Click Here to join Eng-Tips and talk with other members! Your force diagram assumes that the pin dia and the pin hole dia are the same But F is the section you want to check to be thorough.
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Asme Bth-1-2008 Design of Below-The-hook Lifting Devices
Register now while it’s still free! WillisV, Agreed, this makes sense to me despite being a mechie.
You may delete a document from your Alert Profile at any time. The base of my lugs will be wider, however, to be conservative I am designing with a constant width plate for now. Join your peers on the Internet’s largest technical engineering professional community.
By joining you are opting in to receive e-mail. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. I have never seen a lifting lug that would not be classified as compact by a long shot.
Students Click Here Join Us! Hi All, Thanks for your help. Their thickness is generally driven by byh checks on the pin hole that make this plate much much stockier than typical structural elements. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Defense manufacturing is all about project manufacturing and project accounting.
Download Now White Paper: We just recently designed some lifting lugs where the dimensions were pretty much set by the client. Posting Guidelines Promoting, selling, asmf, coursework and thesis posting is forbidden. The lug is as per figure C Download Now Defense manufacturing is all about project manufacturing 208 project accounting. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Are you an Engineering professional? I’m not sure LTB of a lug could ever happen unless you had a really funky looking lugI would probably just use the full plastic capacity of the pad eye.
Hi Dik, That’s correct. It’s easy to join and it’s free.
Asme Bth Design of Below-The-hook Lifting Devices
The Eng-Tips staff will check this out and take appropriate action. The problem I have is that it’s not clear to me if I am dealing with a compact or non-compact section as per table Thanks again, of course further comment is always welcome. Please first verify your email before subscribing to alerts. Red Flag This Post Please let us know here why this post is inappropriate. The provisions in this Standard apply to the design or modification of below-the-hook lifting devices.
The next available drill size will be used to make the hole slightly larger than the pin. Therfore it is inherently compact. Please first log in with a verified email before subscribing to alerts. I think what I posted above is correct but WillisV and others posts are right on – buckling isn’t really an issue with lugs like this unless the plate is thin and the lug is really long and extended.