PEMB Interior columns

[jike]

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?

 

[vandede427]

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.

 

[msquared48]

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

 

[BAretired]

PEMB = Pre Engineered Metal Buildings, right?

BA

 

[BAretired]

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

 

[msquared48]

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

 

[BAretired]

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

 

[msquared48]

Journalists, we are not, thank god.

Mike McCann
MMC Engineering

 

[hokie66]

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.

 

[apsix]

Yes, what does BA stand for?

 

[BAretired]

The following question appeared on another forum:

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

How is that for clarity?

BA

 

[msquared48]

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

Mike McCann
MMC Engineering

 

[hokie66]

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

 

[jike]

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.

 

[BAretired]

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

 

[BAretired]

I have just discovered that the acronym RCC stands for Reinforced Cement Concrete.

Reference:

http://www.cpwd.gov.in/handbook.pdf

BA

 

[apsix]

To demonstrate the confusion that can occur;
I always read RCC as Roller Compacted Concrete, used for gravity dam building.

http://www.rccdams.co.uk/projects/index.htm

 

[hokie66]

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

 

[BAretired]

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

BA

 

[BAretired]

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