Saturday, May 12, 2007

Re: metal lattice

Bingo, we have a winner!
Thanks,
Chuck Utzman, P.E.

Donald Bruckman wrote:
> If you go to a iron fencing shop rather than regular steel fabricator they
> can get thinner "gauge" metal tubing which is a lot less expensive.
>
> -----Original Message-----
> From: chuck utzman [mailto:chuckuc@pacbell.net]
> Sent: Friday, May 11, 2007 11:42 AM
> To: seaint@seaint.org
> Subject: metal lattice
>
> Help--
> I need to build some exterior metal lattices (for vines) for our house.
> Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
> Planning Commission wants to see square or rectangular tubes & I don't
> want to spend a fortune on structural tubing. Suggestions?
> (Support/loading is not an issue here-- I'm just looking for a least
> cost solution.)
> Thanks,
> Chuck Utzman, P.E.
>
>
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MacArthur MAze Collapse --Text, audio and video stream of Jim Lehrer News Hour Segment now on the Internet.

Dear Friends: If you have interest in the collapse of 2 spans of
Distribution Structure (publicly known as the MacArthur Maze) in
California, the text, audio and video stream of the PBS, Jim Lehrer News
Hour segment on this, broadcast on Thursday May 10, 2007 is now on PBS
site:
http://www.pbs.org/newshour/bb/science/jan-june07/overpass_05-10.html

A 4-person crew of PBS spent several days last week with our research
team at the site and on Campus while we were conducting our NSF funded
research on this structure and in my opinion, this segment, like all
other items on Lehrer News, is one of the most high integrity and
informative piece of television news. I am not saying this because of
being in the segment, I have been in many TV segments over the years,
but because of observing continuously the utmost professional journalism
I saw how much effort was put into it by so many people resulting in
just less than 9 minutes of news item.

There is a short segment in it in Farsi and for those who don't know
Farsi, (almost 99.9%!), in this segment, I am asking Caltrans Senior
Resident Construction Engineer Ramses Sargiss, "Can we( our research
team) go up now?" and he responds "Now?, yes, let us go..". With his
help and the help of others specially Bijan Sartipi, Director of
District 4 , and Peter Strykers, Senior Resident Structural Engineer we
are now able to collect perishable data as well as the fire-affected
steel from this site as part of our NSF funded project for future studies.
If you have any questions on any aspects of our project, please do not
hesitate to send me an e-mail at astaneh@ce.berkeley.edu.
Best wishes.
"Hassan"
Abolhassan Astaneh-Asl, Ph.D., P.E.
Professor, Structural and Earthquake Engineering and Protection of
Structures Against Terrorist Attacks
Center for Catastrophic Risk Management (CCRM)
Contact info at: http://www.ce.berkeley.edu/~astaneh


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Friday, May 11, 2007

Re: costs of code, revisions, clarifications, seminars, programs and insurance

Keep in mind it is a two way street. To my knowledge, ALL code commmittee
meetings (at least those of concensus based committees) are open to the
public, each and EVERY engineer out there is free to attend those meetings
and get involved and give input. Further more, all concensus based
standards have a public comment period where engineers (and others) are
free to review proposed changes and offer up comments about those changes.
And if those comments are well founded and pertinent (as opposed to just
something like "this change sucks...fix it"), then they can result in
those proposed changes getting modified or even withdrawn. How many
engineers out there take advantage to be part of the process even if it is
just to offer comments during the public comment period? From my
experience, not many. Too many are too busy complaining about stuff to
actually take some time to try and get involved and help actually fix the
stuff that they complain about.

To that effect, I will note that the MSJC (masonry code) is currently in
its 3 month public comment period until May 31st. You can download the
proposed changed from the TMS website (www.masonrysociety.org). And the
ACI 318-08 public comment period I believe should be happening sometime
soon.

I will also note that ALL concensus based standard committees to my
knowledge have a way where non-committee members can proposed changes to
the code. For example, here is the link to the form to propose a change
to ASCE 7-05:

http://www.seinstitute.org/word/proposal_form_asce_7-05.doc

It is YOUR responsbility to be aware of what is going on in the world,
including changes to codes. Expecting the leaders of some group (like
SEAOC) to tell what changes are potentially happening is just a false
hope. After all, how many times has your Senator or Representative
called, emailed, or mailed you about potential changes to laws done in
Congress? If you don't get involved then it is on you not them.

Regards,

Scott
Adrian, MI


On Fri, 11 May 2007, David Merrick wrote:

> Who is the majority of engineers?
> Is it the independent engineer that is usually not heard from?
> Is most of structural engineering not most of the design code effort?
> Can more of those you know be invited to this web service?
>
> High code costs are prohibitive.
> Code changes and errors are followed with further costs for
> clarifications, explanations, seminars, computer programs, and
> unlegislated revisions.
>
> Are letters from engineering groups and are messages on this server,
> read by our representatives supporting our request for code changes?
>
> No one seems to be liable for codes, clarifications, seminars and
> computer programs.
> There are some who gain when errors occur and when the code requires
> explanation.
> It sometimes seems that the explanation is an attempt to create and to
> become the standard of care where the code falls short. I like to hear
> rationale that could be used for a particular interpretation of the
> code, leaving it a fact that the code is missing a direct solution.
>
> A good code change is clear and increases safety more than the risk of
> an error due to the code change.
>
> How do you feel about the partial code changes that are supposed ease us
> into a full change later?
> This is an important issue that was recently side stepped in a seminar
> with a reference to a bus. I would like to see an apology for that one
> and I would like hear what our experience is with the 1997 UBC partial
> step into IBC. My energy put into learning code changes has recently
> been greater than my constant query into the physics, the safety and
> construction communications.
>
> If there are enough supporters then would it not be valuable to consider
> letters to legislators to support our committees?
> What is SEAxx successfully doing about the cost of; code, its errors and
> required supporting explanations and programing?
>
> It might be more helpful if those in charge took the time to mention
> things on this server, from time to time, reaching out to whom they
> represent.
>
>
> David Merrick
>
>
>
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Re: roller coaster supporting structure

Many many thanks to all you guys, for your utmost attention to other's problems, although we do not know each other. I am very pleased with this forum. Good Luck, and I will search for help from an expert to help me.
 
Best Regards
Junata

 
On 5/12/07, Gerard Madden, SE <gmse4603@gmail.com> wrote:
I think someone with a specialty in roller coasters should be doing that work. Like others have said, it's not something you want to be attempting without someone with experience closely guiding you along.

If you need an engineer to consult with, contact Jeppe Larsen with Middlebrook + Louie in San Francisco.  www.mplusl.com     Super nice guy and brilliant too, has probably done over 100 roller coaster designs.

-g


On 5/11/07, JC Wish L <jcwish00@gmail.com> wrote:
Thanks Gerard,
 
I am designing the support structure (I mean frame supporting the rooler coaster).
I need to know its loading behaviour, and how to get the value of those loads.
Any idea or refferences? TIA
 
Best Regards
Junata

 
On 5/11/07, Gerard Madden, SE <gmse4603@gmail.com > wrote:
Are you designing the pile caps or drilled pier foundations?

I used to work with an engineer who did this type of work (foundations mostly) for major amusement parks in California and Florida. I know he would receive the load at various points along the ride from the Mechanical/Coaster Engineer.

I thumbed through one of his calc books once during lunch one day and I remember there being a lot of load combinations he checked and maybe even some impact loading criteria (i.e. scaling up for safety factors). There may have been some fatigue design issues as well he considered for the baseplate connection.

Can't remember much more...sorry.

-gm


On 5/10/07, JC Wish L <jcwish00@gmail.com> wrote:
Dear All,
 
Please help.
I need some refference books about how to design a roller coaster support.
Or any suggestion?
 
Best Regards
Junata



--
-gm




--
-gm

costs of code, revisions, clarifications, seminars, programs and insurance

Who is the majority of engineers?
Is it the independent engineer that is usually not heard from?
Is most of structural engineering not most of the design code effort?
Can more of those you know be invited to this web service?

High code costs are prohibitive.
Code changes and errors are followed with further costs for
clarifications, explanations, seminars, computer programs, and
unlegislated revisions.

Are letters from engineering groups and are messages on this server,
read by our representatives supporting our request for code changes?

No one seems to be liable for codes, clarifications, seminars and
computer programs.
There are some who gain when errors occur and when the code requires
explanation.
It sometimes seems that the explanation is an attempt to create and to
become the standard of care where the code falls short. I like to hear
rationale that could be used for a particular interpretation of the
code, leaving it a fact that the code is missing a direct solution.

A good code change is clear and increases safety more than the risk of
an error due to the code change.

How do you feel about the partial code changes that are supposed ease us
into a full change later?
This is an important issue that was recently side stepped in a seminar
with a reference to a bus. I would like to see an apology for that one
and I would like hear what our experience is with the 1997 UBC partial
step into IBC. My energy put into learning code changes has recently
been greater than my constant query into the physics, the safety and
construction communications.

If there are enough supporters then would it not be valuable to consider
letters to legislators to support our committees?
What is SEAxx successfully doing about the cost of; code, its errors and
required supporting explanations and programing?

It might be more helpful if those in charge took the time to mention
things on this server, from time to time, reaching out to whom they
represent.


David Merrick

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RE: NEWSHOUR report on the MacArthur Maze freeway collapse

Oliver Stone’s beeper just went off…

 

 

 

David L. Fisher SE PE

Senior Director

 

Cape Cod Grand Cayman Holdings Ltd. - Cayman

Fisher+Partners Structural Engineers Ltd. - Cayman

372 West Ontario Chicago 60610

75 Fort Street Georgetown Grand Cayman BWI

319 A Street Boston 02210

 

 

312.573.1701

312.573.1726 facsimile

312.622.0409 mobile

 

www.ccgch.com

www.fpse.com

 

 

 

 


From: AmerRescue@aol.com [mailto:AmerRescue@aol.com]
Sent: Friday, May 11, 2007 3:46 PM
To: seaint@seaint.org
Subject: Re: NEWSHOUR report on the MacArthur Maze freeway collapse

 

In a message dated 5/11/2007 2:17:14 P.M. Atlantic Daylight Time, gmse4603@gmail.com writes:

You sir, have shown once again, that you are an ignoramous and attention seeker.

Astaneh has been nothing but completely dedicated to our profession and by all accounts an extremely honorable figure in his work as both a teacher, researcher, and engineer. I for one, have learned much from his many publications on seismic steel design.

Read english. That is exactly what I said; however, he will be blacklisted for stirring up trouble. That is the way cover-ups work.

 

doug copp




See what's free at AOL.com.

Re: NEWSHOUR report on the MacArthur Maze freeway collapse

In a message dated 5/11/2007 2:17:14 P.M. Atlantic Daylight Time, gmse4603@gmail.com writes:
You sir, have shown once again, that you are an ignoramous and attention seeker.

Astaneh has been nothing but completely dedicated to our profession and by all accounts an extremely honorable figure in his work as both a teacher, researcher, and engineer. I for one, have learned much from his many publications on seismic steel design.
Read english. That is exactly what I said; however, he will be blacklisted for stirring up trouble. That is the way cover-ups work.
 
doug copp




See what's free at AOL.com.

RE: Chinese Building Code

Try http://www.morgain.com/Help/CodeInForce.htm

 

There are some Chinese building codes:  Masonry Code (GB50003-2001), Foundation Design Code (GB50007-2002), Design Loads for Building Structures (GB50009-2001), Concrete Code (GB50010-2002), Seismic Design Code (GB50011-2002) & High-Rise Reinf. Conc. Building Design Code (JGJ 3-2002).

 

 

 

-----Original Message-----
From: Gil Brock [mailto:gil@raptsoftware.com]
Sent: Thursday, May 10, 2007 7:23 PM
To: seaint@seaint.org
Subject: Re: Chinese Building Code

 

Michael,

There are national codes. The current concrete code is GB50010-2002. Check out www.china-building.com.cn or www.china-abp.com .


At 06:19 AM 11/05/2007, you wrote:

Can someone give me any guidance in obtaining a copy of a Chinese building code?  Is there a national code, or regional or city codes?  I appreciate any help.
 
Thanks,
Mike Hemstad, P.E.
MBJ
Minneapolis, Minnesota

 
Michael Hemstad, P.E.
 
[]
 
Meyer, Borgman and Johnson, Inc.
 
12 South Sixth Street
Suite 810
Minneapolis, MN 55402
(612) 338-0713 (main)
(612) 604-3621 (direct)
(612) 337-5325 (fax)
www.mbjeng.com


Regards  Gil Brock
Prestressed Concrete Design Consultants Pty. Ltd. (ABN 84 003 163 586)
5 Cameron Street Beenleigh Qld 4207 Australia
Ph +61 7 3807 8022               Fax +61 7 3807 8422
email:            gil@raptsoftware.com
email:            sales@raptsoftware.com
email:            support@raptsoftware.com
webpage:         http://www.raptsoftware.com

RE: metal lattice

Here is the link to Jakob cable systems where you can get some good
ideas. I was spelling it wrong.

http://www.jakob-usa.com/


Christopher Banbury, PE
President
Ark Engineering, Inc.
PO Box 10129, Brooksville, FL 34603
22 N. Broad ST, Brooksville, FL 34601
Phone: (352) 754-2424
FAX: (352) 754-2412
www.arkengineering.net


-----Original Message-----
From: Donald Bruckman [mailto:bruckmandesign@verizon.net]
Sent: Friday, May 11, 2007 3:31 PM
To: seaint@seaint.org
Subject: RE: metal lattice

If you go to a iron fencing shop rather than regular steel fabricator
they
can get thinner "gauge" metal tubing which is a lot less expensive.

-----Original Message-----
From: chuck utzman [mailto:chuckuc@pacbell.net]
Sent: Friday, May 11, 2007 11:42 AM
To: seaint@seaint.org
Subject: metal lattice

Help--
I need to build some exterior metal lattices (for vines) for our house.
Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
Planning Commission wants to see square or rectangular tubes & I don't
want to spend a fortune on structural tubing. Suggestions?
(Support/loading is not an issue here-- I'm just looking for a least
cost solution.)
Thanks,
Chuck Utzman, P.E.


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RE: metal lattice

If you go to a iron fencing shop rather than regular steel fabricator they
can get thinner "gauge" metal tubing which is a lot less expensive.

-----Original Message-----
From: chuck utzman [mailto:chuckuc@pacbell.net]
Sent: Friday, May 11, 2007 11:42 AM
To: seaint@seaint.org
Subject: metal lattice

Help--
I need to build some exterior metal lattices (for vines) for our house.
Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
Planning Commission wants to see square or rectangular tubes & I don't
want to spend a fortune on structural tubing. Suggestions?
(Support/loading is not an issue here-- I'm just looking for a least
cost solution.)
Thanks,
Chuck Utzman, P.E.


******* ****** ******* ******** ******* ******* ******* ***
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RE: metal lattice

You could use stretch cable between bolts like the Jacobs system; I
can't find the link right now.
Most home improvement stores sell the cable and accessories.

Christopher Banbury, PE
President
Ark Engineering, Inc.
PO Box 10129, Brooksville, FL 34603
22 N. Broad ST, Brooksville, FL 34601
Phone: (352) 754-2424
FAX: (352) 754-2412
www.arkengineering.net

-----Original Message-----
From: chuck utzman [mailto:chuckuc@pacbell.net]
Sent: Friday, May 11, 2007 2:46 PM
To: seaint@seaint.org
Subject: metal lattice

Help--
I need to build some exterior metal lattices (for vines) for our house.
Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
Planning Commission wants to see square or rectangular tubes & I don't
want to spend a fortune on structural tubing. Suggestions?
(Support/loading is not an issue here-- I'm just looking for a least
cost solution.)
Thanks,
Chuck Utzman, P.E.


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RE: metal lattice

Most people would use small dimension cedar or redwood to train the
vines. However, a structural engineer would assume that the vines are
supported by the lattice and use steel framing.

Bill

-----Original Message-----
From: chuck utzman [mailto:chuckuc@pacbell.net]
Sent: Friday, May 11, 2007 10:42 AM
To: seaint@seaint.org
Subject: metal lattice

Help--
I need to build some exterior metal lattices (for vines) for our house.
Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
Planning Commission wants to see square or rectangular tubes & I don't
want to spend a fortune on structural tubing. Suggestions?
(Support/loading is not an issue here-- I'm just looking for a least
cost solution.)
Thanks,
Chuck Utzman, P.E.


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Re: metal lattice

On May 11, 2007, at 1:42 PM, chuck utzman wrote:

> I need to build some exterior metal lattices (for vines) for our
> house. Four panels approx. 9' wide by 14' tall with a 1' x 2'
> grid. The Planning Commission wants to see square or rectangular
> tubes & I don't want to spend a fortune on structural tubing.
> Suggestions? (Support/loading is not an issue here-- I'm just
> looking for a least cost solution.)
I wonder if you could use bird netting.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania
1864)
http://www.skypoint.com/~chrisw/

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metal lattice

Help--
I need to build some exterior metal lattices (for vines) for our house.
Four panels approx. 9' wide by 14' tall with a 1' x 2' grid. The
Planning Commission wants to see square or rectangular tubes & I don't
want to spend a fortune on structural tubing. Suggestions?
(Support/loading is not an issue here-- I'm just looking for a least
cost solution.)
Thanks,
Chuck Utzman, P.E.


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Re: NEWSHOUR report on the MacArthur Maze freeway collapse

True!

Time to put him in the spam list me thinks...

-g

On 5/11/07, Paul Feather <PFeather@se-solutions.net > wrote:

Now you've done it Gerard.  I too, was offended by Mr. Copp's reference to Dr. Astaneh, but hoped no-one would rise to the bait.  The quality of the statement speaks for itself, and the best way to deal with it is to give the comments the attention they deserve, which is none. 

 

As much as we all want to rush to the good Dr.'s defense, I am sure he won't lose a second's sleep over comments made by Mr. Doug Copp.

 


From: Gerard Madden, SE [mailto:gmse4603@gmail.com]
Sent: Friday, May 11, 2007 10:15 AM
To: seaint@seaint.org
Subject: Re: NEWSHOUR report on the MacArthur Maze freeway collapse

 

You sir, have shown once again, that you are an ignoramous and attention seeker.

Astaneh has been nothing but completely dedicated to our profession and by all accounts an extremely honorable figure in his work as both a teacher, researcher, and engineer. I for one, have learned much from his many publications on seismic steel design.



On 5/10/07, AmerRescue@aol.com <AmerRescue@aol.com> wrote:

In a message dated 5/10/2007 8:12:14 P.M. Atlantic Daylight Time, Rhkratzse@aol.com writes:

 

The NSF loop-hole will be closed in a hurry.( Heads will roll ) for giving him the money..Asteneh will be black listed..and every thing will be 'under control' the same as 'duck and cover'.

 

By the way I am winning my $131,000,000.00 libel lawsuit and will be back..till I drop dead.

 

doug copp




See what's free at AOL.com.




--
-gm




--
-gm

RE: NEWSHOUR report on the MacArthur Maze freeway collapse

Now you’ve done it Gerard.  I too, was offended by Mr. Copp’s reference to Dr. Astaneh, but hoped no-one would rise to the bait.  The quality of the statement speaks for itself, and the best way to deal with it is to give the comments the attention they deserve, which is none. 

 

As much as we all want to rush to the good Dr.’s defense, I am sure he won’t lose a second’s sleep over comments made by Mr. Doug Copp.

 


From: Gerard Madden, SE [mailto:gmse4603@gmail.com]
Sent: Friday, May 11, 2007 10:15 AM
To: seaint@seaint.org
Subject: Re: NEWSHOUR report on the MacArthur Maze freeway collapse

 

You sir, have shown once again, that you are an ignoramous and attention seeker.

Astaneh has been nothing but completely dedicated to our profession and by all accounts an extremely honorable figure in his work as both a teacher, researcher, and engineer. I for one, have learned much from his many publications on seismic steel design.



On 5/10/07, AmerRescue@aol.com <AmerRescue@aol.com> wrote:

In a message dated 5/10/2007 8:12:14 P.M. Atlantic Daylight Time, Rhkratzse@aol.com writes:

 

The NSF loop-hole will be closed in a hurry.( Heads will roll ) for giving him the money..Asteneh will be black listed..and every thing will be 'under control' the same as 'duck and cover'.

 

By the way I am winning my $131,000,000.00 libel lawsuit and will be back..till I drop dead.

 

doug copp




See what's free at AOL.com.




--
-gm

Re: roller coaster supporting structure

I think someone with a specialty in roller coasters should be doing that work. Like others have said, it's not something you want to be attempting without someone with experience closely guiding you along.

If you need an engineer to consult with, contact Jeppe Larsen with Middlebrook + Louie in San Francisco.  www.mplusl.com    Super nice guy and brilliant too, has probably done over 100 roller coaster designs.

-g

On 5/11/07, JC Wish L <jcwish00@gmail.com> wrote:
Thanks Gerard,
 
I am designing the support structure (I mean frame supporting the rooler coaster).
I need to know its loading behaviour, and how to get the value of those loads.
Any idea or refferences? TIA
 
Best Regards
Junata

 
On 5/11/07, Gerard Madden, SE <gmse4603@gmail.com > wrote:
Are you designing the pile caps or drilled pier foundations?

I used to work with an engineer who did this type of work (foundations mostly) for major amusement parks in California and Florida. I know he would receive the load at various points along the ride from the Mechanical/Coaster Engineer.

I thumbed through one of his calc books once during lunch one day and I remember there being a lot of load combinations he checked and maybe even some impact loading criteria (i.e. scaling up for safety factors). There may have been some fatigue design issues as well he considered for the baseplate connection.

Can't remember much more...sorry.

-gm


On 5/10/07, JC Wish L <jcwish00@gmail.com> wrote:
Dear All,
 
Please help.
I need some refference books about how to design a roller coaster support.
Or any suggestion?
 
Best Regards
Junata



--
-gm




--
-gm

Re: NEWSHOUR report on the MacArthur Maze freeway collapse

You sir, have shown once again, that you are an ignoramous and attention seeker.

Astaneh has been nothing but completely dedicated to our profession and by all accounts an extremely honorable figure in his work as both a teacher, researcher, and engineer. I for one, have learned much from his many publications on seismic steel design.




On 5/10/07, AmerRescue@aol.com <AmerRescue@aol.com> wrote:
In a message dated 5/10/2007 8:12:14 P.M. Atlantic Daylight Time, Rhkratzse@aol.com writes:

The NSF loop-hole will be closed in a hurry.( Heads will roll ) for giving him the money..Asteneh will be black listed..and every thing will be 'under control' the same as 'duck and cover'.
 
By the way I am winning my $131,000,000.00 libel lawsuit and will be back..till I drop dead.
 
doug copp




See what's free at AOL.com.



--
-gm

SCBF Compressible Material?

Dear Lin:

You may find material in a recent Steel TIPs report that I co-authored with Mike Cochran and Rafel Sabelli somewhat useful. The TIPs is at http://www.steeltips.org/steeltips/tip_details.php?id=96.
Another Steel TIPS that I am completing on Base Plates for CBFs, to be released in July, has very specific information on your question. A summary of that information is given below:

If the "2t" plastic hinge length of the gusset plate in SCBFs ends up being encased in the concrete of the floor slab, which is normally the case for gusset plates connected to the top flange and base plate, there needs to be a gap between the gusset plate and the concrete slab on both sides of the gusset plate to allow the gusset to bend out of plane and accommodate end rotation of out-of-plane buckling brace. The width of the gap depends on the lateral deformation of the brace which in turn depends on the axial shortening of the brace. The axial shortening of course is directly related to the story drift by geometry. Putting all of this together and going through the derivations, the equation that can be used to establish what should be the width of the gap:

g= (Teta)( Lg), where g is the width of the gap on each side, Teta is the story drift and Lg is the length of gusset embedded in the concrete measured along the axis of bracing. I have suggested a drift value of 2% for SCBF's.
The 2% used here is the expected story drift for SCBFs similar to what 3% is for SMFs.

Example of application: For a gusset with Lg=12", the gap will be g= (2%)(12)=2.4 inches.
As for what material can be used in the gap, after calculating the needed gap, you can use any material but you have to make sure that that material deform at least an amount equal to "g" the calculated gap when subjected to compression of 500 psi. The value of 100 psi is arbitrarily selected to be low enough not to cause crushing of concrete behind the fill material. Obviously if material is soft, you would need just to add small amount to the gap size g to accommodate the thickness of the material after it has been compressed. if material is relatively stronger, if you have a feel how much it will be squeezed into, you can add that to the amount.

Please consider the above text: Copyright 2007 by Abolhassan Astaneh-Asl until I get it into the Steel TIPS in progress: " Behavior and Design of Base Plates in Concentrically Braced Frames" By A. Astaneh;Asl, July 2007.

Finally, following Albert Einstein's saying that : "everything should be made simple but not simpler", which is my motto in my professional and academic life, I would just use 3.5-4 inches of gap on each side of the gusset plate, and fill it with relatively soft fill material, anything with less than f'c= 200-300 psi , and forget about end rotations of half sinusoidal curves while buckling out of plane in an inclined position being a member of special concentrically braced frame with both ends partially embedded in the concrete slab and forming plastic hinges in "2t" space! I can't spend this much time on design of a gusset. I have a building to design and finish the design yesterday!

Best wishes in your design and hope this helps.

Abolhassan Astaneh-Asl, Ph.D., P.E.
Contact info at: http://www.ce.berkeley.edu/~astaneh

===================================

From: Daryl Richardson <h.d.richardson@shaw.ca>
Subject: Re: SCBF Compressible Material?
To: seaint@seaint.org

This is a multi-part message in MIME format.

------=_NextPart_000_0009_01C792FC.24F77700
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

J. Lin,

I can not answer your question directly but I have seen =
styrofoam used for similar purposes where it does not work as intended. =
I have seen it used under grade beams supported on piles to prevent =
uplift due to frost action or swelling soil where it does not perform as =
expected. The structurally weakest (white) styrofoam type of insulation =
generally resists about 10 p.s.i (1440 p.s.f.) before significant =
yielding takes place; and stronger (structurally) grades, such as =
Styrofoam HI, can resist from four to eight times as much or more.

These are very small stress levels compared to structural =
building materials; but if you have large enough contact (and here, I am =
not familiar with your geometry) areas the resulting forces may not be =
irrelevant.

Regards,

H. Daryl Richardson
----- Original Message -----=20
From: SE3949=20
To: seaint@seaint.org=20
Sent: Thursday, May 10, 2007 10:58 AM
Subject: SCBF Compressible Material?


For Steel Special Concentrically Braced Frame (SCBF), I always saw the =
Contractor using Styrofoams at both sides of the embedded gusset plate =
as the compressible material to eliminate the lateral restraint.=20

Recently there is a project that the Contractor using the "JOINT =
FILLER" (Fibre Expansion Joint by W. R. Meadows, Inc.; similar to the =
one you saw on your concrete driveway as the concrete divider but =
harder) instead of the Styrofoam. The Contractor and the Design =
professionals claimed that this FILLER were used for MANY projects in =
the past several years in SCBF design/construction.

Can you let me know your opinion regarding those rigid-like filler for =
SCBF?=20

My opinion: That filler will provide excessive lateral restraint and =
will prevent the brace to buckle in pin-pin shape. If the brace did not =
buckle at the designated force level (lost the function as the FUSE =
system), then other portion of the frames (columns, beams, joints, =
connections) might fail before the actual brace buckling. The designer's =
nightmare of sudden building collapse might occur since the brace =
wouldn't buckle (dispatchs the energy and also acts as the warning sign) =
at that designated seismic force.

J. Lin, SE
Los Angeles


--------------------------


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RE: Chinese Building Code

 

For Design Loads for Building Structures (GB50009), try http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.morgain.com/Help/GB50009-2001/LoadCodeForTheDesignOfBuildingStructures.htm&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3DGB50009%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3Dx4X .

 

 

 

 

 

 

-----Original Message-----
From: Gil Brock [mailto:gil@raptsoftware.com]
Sent: Thursday, May 10, 2007 7:23 PM
To: seaint@seaint.org
Subject: Re: Chinese Building Code

 

Michael,

There are national codes. The current concrete code is GB50010-2002. Check out www.china-building.com.cn or www.china-abp.com .


At 06:19 AM 11/05/2007, you wrote:

Can someone give me any guidance in obtaining a copy of a Chinese building code?  Is there a national code, or regional or city codes?  I appreciate any help.
 
Thanks,
Mike Hemstad, P.E.
MBJ
Minneapolis, Minnesota

 
Michael Hemstad, P.E.
 
[]
 
Meyer, Borgman and Johnson, Inc.
 
12 South Sixth Street
Suite 810
Minneapolis, MN 55402
(612) 338-0713 (main)
(612) 604-3621 (direct)
(612) 337-5325 (fax)
www.mbjeng.com


Regards  Gil Brock
Prestressed Concrete Design Consultants Pty. Ltd. (ABN 84 003 163 586)
5 Cameron Street Beenleigh Qld 4207 Australia
Ph +61 7 3807 8022               Fax +61 7 3807 8422
email:            gil@raptsoftware.com
email:            sales@raptsoftware.com
email:            support@raptsoftware.com
webpage:         http://www.raptsoftware.com

Re: Off Topic :Vish seeks advice/suggestions

I agree with Don 100%... in fact, I've got a gig tonight....so I get to leave work early today to go home and take a nap...got 4 hours of shredding to do tonight right after the Warriors game!

Guitar is very very difficult at first. Even for hacks like myself, something seems to click if you practice about 10 hours a week after two years of playing along to whatever music you like (in my case Metallica, Zeppelin, and Guns N Roses).

Then there are some who are just naturals. I know this guy who's been playing only 5 years and is as incredible a guitar player I've ever seen or heard.

Bottom line, it's very challenging and VERY VERY FUN! Definately suited to engineers (in fact there are 3 engineers in my band). Music is very condusive to math-inclined folks...

If your in Santa Clara, CA near the University, come on out tonight! :-)

If anyone is going to learn, get one of those 20 buck DVD's. They'll teach you the basics without going to lessons and the nice thing is you can just hit SKIP to go back if you didn't understand something @ first.

Then get GROUP Lessons....very cheap..

Rock On & Go Warriors !

-g

On 5/11/07, Donald Bruckman < bruckmandesign@verizon.net> wrote:

Vish,

 

One word.  "Guitar".   Go buy yourself one, along with a few "How-to" books.  I bought one on a whim after seeing some 14 year old kid "rip it up" from his bedroom on YouTube about 3 months ago and have been addicted to it ever since.   IMO, the whole hobby is of a sort that all engineers should just love.  Its extremely complex, multi-layered, two-handed brainiac stuff with an endless learning curve and at the same time, potentially very creative, just the kind of thing we nerdy types dig on.  

 

Try it. Youtube has thousands of how-to-play-it videos to help you and inspire you.  Just search "guitar" and go with it.

 


From: G Vishwanath [mailto:gvshwnth@yahoo.com]
Sent: Thursday, May 10, 2007 11:37 PM
To: steel steel; misc misc; seaint@seaint.org
Subject: Off Topic :Vish seeks advice/suggestions

 

List,

 

After Google earth and IPod Mp3 files and podcasts, the child in me is now greatly enamoured with his new toy.
I got to know of Youtube recently and got instantly hooked.
My band width at home is not enough to be able to enjoy streaming video unless the clips are very short.
The pauses during buffering detracts from the enjoyment.
I wanted to download the longer clips of interest and watch them uninterrrupted later.
I have plenty of time to download. It goes on in the background while I am busy at work.
I then happened upon a utility called YouRipper that allows one to download the clips.

 

I hardly ever go to the movie halls. I am sick of local TV these days.
The news is always bad, needlessly sensational and repetitive, and the commercial breaks irritate me.
I don't watch sports unless it's a one day cricket match between India and Pakistan and unless Sachin or Sehwag or Dhoni is batting and batting well.

 

The TV regional language soaps drag endlessly and the same characters appear in different roles in different serials and have me all confused and, since I watch off and on,  I end up asking stupid questions to my wife who is upto date on who hates whom, who loves whom and who is plotting against whom, who are the good guys, and who are the bad guys in all the serials being aired at Bangalore. She frowns in irritation at my innocent questions and signals me to keep quiet while she laps up what is offered. There's no hope of dinner till the serials are over. The commercial breaks are used by her to have a quick peek into the kitchen to stir the pot and prevent the dinner from being burnt. She is also a consultant and recounts in lurid detail over the phone a blow by blow account of the last episode that her friends missed and who call her to catch up.

 

I find myself going back to the PC and internet at home to entertain myself.
After attending to the mails and writing the long personal mails to friends I am sometimes left with nothing else to do.

That was before I happened upon Youtube.

After a hard day, to unwind, I want something that can make me laugh.
I have located some old comedy serials that I had enjoyed in the 1980s and downloaded them.
I now have ALL the "Yes minister" and the "Yes Prime minister" episodes safely tucked away on my hard disk in flv format, for me to enjoy again and again.
I located some episodes of "The Lucy Show" and other sitcoms like "Are you being served"
I could also locate old and very popular Hindi comedies of Jaspal Bhatti (The flop show)
My appetite for shows like these is insatiable.

Now that my tastes are clear, I am requesting list members to suggest names of shows like these that you feel I will enjoy.
The search box in Youtube will help me locate them if they are available.
I just want names of the shows as suggestions. If you can give the urls on Youtube that would be even better.
British, American and Hindi Comedy Serials are what I am looking for.
Please mail me privately to avoid cluttering the list with off-topic mails.
Regards
Vish


 

 


Don't get soaked. Take a quick peak at the forecast
with theYahoo! Search weather shortcut.




--
-gm

Chinese Building Code

Gil Brock wrote:
 
"Michael,
There are national codes. The current concrete code is GB50010-2002.
Check out www.china-building.com.cn or www.china-abp.com."
 
Thanks for your help, Gil.  I appreciate it.
 
 
 
Hey Michel, when you go out tonight, have a couple of dark beers, and then ask them to put some Southern Comfort in your Shirley Temple.
 
This isn't SEAredneck; it's an international post.  Try not convince the rest of the world that the stereotypes about us in the States are true.  Our image-management people in the Executive Branch have enough trouble without guys like you chiming in.
 
Mike Hemstad
MBJ
Minneapolis, Minnesota

 
Michael Hemstad, P.E.
 
 
Meyer, Borgman and Johnson, Inc.
 
12 South Sixth Street
Suite 810
Minneapolis, MN 55402
(612) 338-0713 (main)
(612) 604-3621 (direct)
(612) 337-5325 (fax)
www.mbjeng.com

RE: Cost of codes (was RE: ASCE 7-05 Wind Load and Publication Costs)

Bill,

Believe me...I understand. I am "fortunate" in that I am used to the
multiple references since the BOCA code has been doing it for a LONG time.
I can sympathize with those that use the UBC in that they have to adjust
to a new system.

I will note, however, that you likely paid for it indirectly. For
example, the UBC still made use the ACI 318 provisions, but just printed
those provisions directly in the UBC. I suspect that they had to pay ACI
royalties (either that or "stole" from ACI). So, you paid for it any way.
I suppose it could still be done that way, but the UBC (or IBC) would be a
hell of lot thicker as ALL the provisions for the various materials have
gotten more complex (which is good to some degree and bad in other ways).

Personally, I like the seperate standards as you have less of a chance of
"stupid" stuff getting into the code. Getting something into the IBC is
at the whim of a bunch of code officials. While there are certainly a
bunch of code officials that know about structural issues (i.e. Ben Y.),
there are also a lot of them that really don't. While the consensus
standards process is not perfect, I find it MUCH better than the ICC code
process with hearings and building officials making the final decisions.
But, that is just me.

And personally, when I had to use the UBC, I tended to still just use my
copy of ACI 318-95 (for the 1997 UBC) as I could find stuff in it MUCH
easier than I could the UBC. But, then I had to find the same provisions
(easy due to the numbering system) in the UBC to make sure the ICBO folks
did not "tweak" it.

In the end, we all like what we are used to using. I am used to having to
use the seperate standards and I tend to like it better than when I have
to use the UBC. But we cannot always keep using what we like...there is a
thing in life called "change" and it has a nasty habit of popping up every
once and a while! <grin>

Regards,

Scott
Adrian, MI


On Fri, 11 May 2007, Bill Allen wrote:

> Scott -
>
> I understand your point in absolute terms, but please compare how the
> current approach is better than the one utilized when the 1994 UBC was
> published. You may recall that the 1994 UBC was at the opposite end of the
> spectrum in that one rarely needed to open another reference (at least that
> was the case for me and my practice).
>
> Regards,
>
> T. William (Bill) Allen, S.E.
> ALLEN DESIGNS
> Consulting Structural Engineers
>
> > -----Original Message-----
> > From: Scott Maxwell [mailto:smaxwell@engin.umich.edu]
> > Sent: Thursday, May 10, 2007 10:58 PM
> > To: seaint@seaint.org
> > Subject: Cost of codes (was RE: ASCE 7-05 Wind Load and Publication Costs)
> >
> > The solution is easy then...have the "government" spend the money to write
> > their own codes. Like it or not, it costs money to produce documents like
> > ASCE 7, ACI 318, etc. And those organizations that produce those
> > documents deserve to be compenstated for their effort. The "government"
> > has chosed to take the easy way and have someone else produce what the
> > "government" then chooses to use as the basis of law. They don't own the
> > rights to those publications, so you don't get them for free.
> >
> > I would ask if you would mind the "government" taking your house and land
> > with no compensation. If you mind that, then why do so many seem so
> > willing to expect the "government" take the work of private organizations
> > (i.e. the various codes/standards) and not compensate those organizations.
> > And keep in mind that supposedly "we" are the "government". So, "we" need
> > to compensate those organizations.
> >
> > There are definitely different cost/distribution models that can be used.
> > Right now, the model is basically a "user" tax type model...i.e. if you
> > use it, you pay the "tax" (i.e. you must buy the codes). You could go to
> > a general tax, where EVERYONE pays the tax, even though only some gain the
> > direct benefit...i.e. the government pays royalties and then the
> > codes/standards are provide free to those who need/use them. You could go
> > to a different use "tax"...i.e. have home owners and building owners pay
> > some fee that then covers the cost to provide the codes/standards for
> > free.
> >
> > In the end, personally, I don't have all that much sympathy. Like all
> > professions, there is a cost to doing business. In our profession, part
> > of the cost of operating is buying codes and standards necessary to do our
> > work. This is no different than buying a computer, a desk, a chair, a
> > light, a pencil, etc. Other professions have different things that they
> > must buy. Doctors must buy bandages, medical equipment, office equipment,
> > etc. Lawyers must buy office equipment, law books, legal pads, etc. If
> > you start a business that requires you to dig holes, is the goverment
> > going to give you a shovel (or backhoe) for free? Nope. Why do you
> > expect anything different. And for those that argue this is stuff that is
> > required by "law", the same can still be true of that person digging
> > holes/doing construction...he might have to buy hardhats, steel toe boots,
> > or other items as required by "law". The point is that there are many
> > things that many professions HAVE to buy due to requirements from others
> > and things that are optional...but all are part of "doing business".
> >
> > Regards,
> >
> > Scott
> > Adrian, MI
> >
> >
> > On Thu, 10 May 2007, Lloyd Pack wrote:
> >
> > > On 9 May 2007 at 9:48, Donald Bruckman wrote:
> > >
> > > >
> > > > IMO, all the alphabet soup of codes should be overseen by a central
> > > > clearing house, (probably non-governmental would work) that we could
> > > > all subscribe to and have access to, sort of like cable TV.A
> > > > subscription could, for instance, be added to the cost of license
> > > > renewal that would allow access to all the relevant codes you are
> > > > licensed to practice under.
> > >
> > >
> > > This approach still does not make the law available to all citizens that
> > are
> > > held accountable to the law. The problem is that the law, which is/was
> > > Uniform or across the board, is not accessible to all people who are
> > held
> > > accountable for building to that law.
> > >
> > > This is wrong. The law should be accessible to all who must abide by
> > it.
> > > This access should be free to the citizens. Imagine, if any ruling
> > entity
> > > started making laws with criminal consequences and then started
> > enforcing
> > > them by arresting people and prosecuting them under that "hidden" law,
> > but people
> > > could know what the law said by buying in to the membership of those
> > privy to that
> > > law. There would be tremendous outcry, or at least I would hope that
> > there
> > > would be tremendous outcry.
> > >
> > > Now, granted, the Building code doesn't make violations criminal, but
> > the
> > > ruling entities, may arrest your progress through a "red tag" and may
> > impede
> > > progress throughout the remainder of the project. I've even had clients
> > who
> > > have been "blacklisted" by a building department and their other
> > projects were
> > > continually being halted and harassed by the bulding department's
> > inspectors.
> > > This type of action by the building dept. seems punitive, which is often
> > the result
> > > of infractions to any law.
> > >
> > > Take Care,
> > > Lloyd Pack
> > >
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