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PEMB Interior columns

PEMB Interior columns

PEMB Interior columns

(OP)
For a typical 3 span gable roof PEMB frame, what are the designer's assumptions: The interior pipe columns pinned top and bottom and all the lateral load carried by the exterior tapered columns? or all columns (interior and exterior) work together to resist lateral loads in frame action?

RE: PEMB Interior columns

interior PEMB columns are 99% of the time just pinned-pinned pipe columns that are axially loaded only. lateral is taken by the exterior columns.

RE: PEMB Interior columns

If they are pipe columns I agree.  However, it depends on the connection if wide flange colunmns are used.  

In general though, what V427 says is true from my 30 years of experience with PEMB's.

Mike McCann
MMC Engineering

RE: PEMB Interior columns

PEMB = Pre Engineered Metal Buildings, right?  

BA

RE: PEMB Interior columns

Now that I have determined what you mean by the acronym PEMB, I would say that the columns all work together to resist lateral forces, notwithstanding the obvious fact that the interior columns take a very small portion of the applied horizontal load.

BA

RE: PEMB Interior columns

Yea...  PEMB's...

We ought to atart a forum string for anachronisyms.  Then again, I think that's already been done.

Mike McCann
MMC Engineering

RE: PEMB Interior columns

Instead, why don't we define our acronyms at the start of our post?  I believe that is standard practice in the field of journalism.

BA

RE: PEMB Interior columns

Journalists, we are not, thank god.

Mike McCann
MMC Engineering

RE: PEMB Interior columns

I think we should strive to improve our communication skills.  If we don't, we really have no right to criticize journalists.  I agree with BA about acronyms.  They are the bane of this site.

RE: PEMB Interior columns

Yes, what does BA stand for?

RE: PEMB Interior columns

The following question appeared on another forum:

Quote:

What is the best cement for RCC structures in normal condition, OPC or PPC

How is that for clarity?

BA

RE: PEMB Interior columns

If you think what we do is bad, look at teenagers and texting.  Now there is another language.

Mike McCann
MMC Engineering

RE: PEMB Interior columns

I prefer not to look at teenagers.  Makes me feel too old.

RE: PEMB Interior columns

(OP)
I am being influenced by all the acronymns they throw around at work! I thought PEMB was pretty common but I can understand the confusion.

RE: PEMB Interior columns

Most acronyms that I have looked up have many possible meanings.  Sometimes it is possible to determine what is meant from the context, but other times it is not so clear.  

I still do not know what an RCC structure is.  I have googled it and come up with several papers discussing various aspects of RCC structures, but none of them define the meaning of the acronym.  I assume the RC stands for "reinforced concrete" but what is the second "C"?  Damned if I know!

BA

RE: PEMB Interior columns

Roller Compacted Concrete makes sense, Reinforced Cement Concrete does not, at least in the context of a structure.

RE: PEMB Interior columns

Now that you mention it, Roller Compacted Concrete makes more sense to me too.  I have not run into the term before.

BA

RE: PEMB Interior columns

I do not wish to belabor the point, but the "Handbook of Repair and Rehabilitation of RCC Buildings" published by Director General (Works), Central Public Works Department, Government of India, in the Preface, states "Reinforced cement concrete (RCC) as a construction material has come into use for the last one century".  

This illustrates the best way to introduce an acronym, i.e to define it at the beginning of your post or thread.  

There are a number of articles on the internet about RCC structures which do not fall into the category of "Roller Compacted Concrete".  Acronyms should be avoided, but if they cannot be avoided, they should be defined at the start of every thread.  Otherwise, some of us may not know what you are talking about.

 

BA

RE: PEMB Interior columns

Isn't Reinforced Cement Concrete a little redundant?  Concrete has cement in it, and isn't it always going to have cement in it, at least a little bit?

I have also heard of RCC as Roller Compacted Concrete.

RE: PEMB Interior columns

To us, the word cement appears redundant, but "cement concrete" seems to be a term used in India.  Perhaps they have some other type of concrete which does not use cement.  Darned if I know, but read the first sentence in the abstract at this link:

http://www.krishnaconchem.com/papers/paper3.pdf

BA

RE: PEMB Interior columns

Thanks BA

RE: PEMB Interior columns

Transportation engineers use the terms "bituminous concrete" and "asphaltic concrete" in reference to flexible pavements, and "Portland cement concrete" for rigid pavements.  Those guys use a lot of acronyms among themselves.  In Australia C&G (curb and gutter) is called K&C (kerb and channel).  The point BA made is that if you don't know your audience, acronyms should be avoided.

RE: PEMB Interior columns

Thanks, hokie.

BA

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