Notched Ends of Steel Section 4

[dcnnng]

BS 5950, Cl 4.2.5.4 refers to Notched Ends of I or H or Channel section member, please help me, What is "notched end"? Thank you

 

[LGARG]

Hi i think that a notch is a cut that you do on a beam usually on the compresion face of the member. I usually make this notches on ceiling beams that are supported by the top plate and they dont fit in the height between the top plate and the rafters. I hope this could be usefull for you

Lgrossi
AMP CONSULTING

 

[dcnnng]

Hi Lgross,
OK a notch is a cut. You have quoted is a singly notched end How about doubly notched ends for a I beam, do you mean we cut the top and bottom flanges? Can you also give an example of doubly notched ends steel member? Thank you for your advice.

 

[Dinosaur]

I am not familiar with the specification reference you use.

I suspect this may be a reference to a "cope" at the ends of a steel beam. In bolted sections, we often cope the top and/or bottom flanges to eliminate geometric interference with the attaching members. These bolted connections are considered simple end supports so the resulting free-body diagram requires the memebr to resist only shear and no moment. The web carries shear and the flanges carry the moment. Therefore the flanges are not required for capacity and may be removed at simple end connections.

Contact the American Institute of Steel Construction, AISC, for some pictoral examples of coped end beam connections. Good Luck.

 

[csd72]

I believe a double notch occurs when you have two beams of the one size framing into each other. The top and bottom flanges would clash unless the end of one beam was cut back at the flanges.

As Dinosaur said, this is usually called a cope in the USA and Australia.

In the UK it is then typical to weld an end plate to the end of the 'coped' (or notched) beam to take the bolts.

The United Kingdom SCI has a publication of standardised connections which will include examples of this as well as capacities.

http://www.steel-sci.org/

 

[apsix]

Design (in UK) of beam notched end can be found here;

http://www.steelbiz.org/Discovery/ResourcePreview.aspx?ID=ZudFqd9iFK0u4wFhFAO8zA==

 

[dcnnng]

Hi apsix,
Tried to surf to the suggested website but in vain with the following message:
Server Error in '/' Application.

Can you please check whether you have problem to surf to the aforsaid website? Thank you

 

[apsix]

dcnnng
Yes, your right, link doesn't work.

Try going to

http://www.steelbiz.org

and then do a search for
'NCCI: Design of a notched section at the end of a beam'

There's a lot more useful info on that site as well.

 

[dcnnng]

Hi apsix,
Yes, it is cool and a lot more useful info. Thank you very much!!

 

[dcnnng]

Hi apsix,
What does NCCI stand for and what is its homepage? Thank you.

 

[apsix]

dcnnng,
From the SCI (Steel Construction Institute) site;
"Design verification for the Eurocodes will cover the four critical steps:
Each design and each design activity will be described separately by a flow chart;
A commentary will be provided on the effective application of every clause in EC3 and that is referenced;
Non-contradictory, complementary information (NCCI) will be presented that addresses all the information that the Eurocodes do not cover that is essential for design;"

Looks like it's part of the campaign to get British designers familiar with Eurocodes.

 

[dcnnng]

TQ apsix for the info.

 

[henri2]

For an example of beam copes, refer to detail 12, and then a couple of others in the link below

http://www.ladbs.org/faq/info bulletins/building code/QA Standard Plan Sht 3 of 3.pdf