Structural Engineering: 2008-04-20

Friday, April 25, 2008

Re: Seismic on restrained retaining walls

Great thanx Gerard, I will try that

Tarek Mokhtar, SE

Laguna Beach, Ca

Tarek,

I have used this wording in plan check responses under the old code when this came up and it has been found acceptable/reasonable by the plan checkers.

***

1. Seismic design for residential retaining walls is normally not performed. No seismic design criteria for the walls were presented in the soils report. The 2001 CBC code section 1611A.6 states the following:

"retaining walls higher than 12 feet, as measured from the top of the foundation shall be designed to resist the additional earth pressure caused by seismic ground shaking".

This height threshold is not defined in the regular building code as this applies to school and hospital projects. Since the school and hospital (DSA & OSHPD) code provisions, by law, cannot have less stringent criteria than the regular building code, it is logical to state that seismic design need not be considered for these site walls, which do not exceed 6 feet in height. If this were a school or hospital project, the walls would still be exempt from seismic design because they are not taller than 12 feet

hth,
-gm

On Fri, Apr 25, 2008 at 1:11 PM, Tarek Mokhtar <Tarekmokhtar@earthlink.net> wrote:

Gerard,

The 12' retaining wall exception appears in chapter 18A, DSA requirements, but disappears

in chapter 18. Further more section 15.6.1 appears to imply that all retaining walls shall

be designed with additional seismic loads. Does that mean that six or eight foot

retaining walls in backyards get additional seismic loads?

Tarek Mokhtar, SE

Laguna Beach, Ca

And the rule of thumb shall be to keep all of our retaining walls 11'-11" or less in height.

-gm

On Thu, Mar 20, 2008 at 9:12 AM, Hugh Brooks <hbap@aol.com> wrote:

The Mononobe-Okabe equations do not apply to restrained walls where activation movement is restricted.

For seismic lateral on restrained walls Retain Pro uses P = (soil density) x (k) x (retained height)^2. Application is approx. 0.60 x (retained height). This is a slightly trapezoidal loading but with only slight error a uniform loading could be assumed. K is the acceleration factor appropriate to the site.

See Kramer, Geotechnical Earthquake Engineering, Section 11.6.2.

Hugh Brooks, SE

Retain Pro Software

--
-gm

--

Tarek Mokhtar, SE
TMM Structural Engineers, Inc
31645 S. Coast Hwy
Laguna Beach, CA., 92651
949-499-6254
949-499-2777 Fax

--
-gm

--

Tarek Mokhtar, SE
TMM Structural Engineers, Inc
31645 S. Coast Hwy
Laguna Beach, CA., 92651
949-499-6254
949-499-2777 Fax

Re: Seismic on restrained retaining walls

Tarek,

I have used this wording in plan check responses under the old code when this came up and it has been found acceptable/reasonable by the plan checkers.

***

1. Seismic design for residential retaining walls is normally not performed. No seismic design criteria for the walls were presented in the soils report. The 2001 CBC code section 1611A.6 states the following:

"retaining walls higher than 12 feet, as measured from the top of the foundation shall be designed to resist the additional earth pressure caused by seismic ground shaking".

This height threshold is not defined in the regular building code as this applies to school and hospital projects. Since the school and hospital (DSA & OSHPD) code provisions, by law, cannot have less stringent criteria than the regular building code, it is logical to state that seismic design need not be considered for these site walls, which do not exceed 6 feet in height. If this were a school or hospital project, the walls would still be exempt from seismic design because they are not taller than 12 feet

hth,
-gm

On Fri, Apr 25, 2008 at 1:11 PM, Tarek Mokhtar <Tarekmokhtar@earthlink.net> wrote:

Gerard,

The 12' retaining wall exception appears in chapter 18A, DSA requirements, but disappears

in chapter 18. Further more section 15.6.1 appears to imply that all retaining walls shall

be designed with additional seismic loads. Does that mean that six or eight foot

retaining walls in backyards get additional seismic loads?

Tarek Mokhtar, SE

Laguna Beach, Ca

And the rule of thumb shall be to keep all of our retaining walls 11'-11" or less in height.

-gm

On Thu, Mar 20, 2008 at 9:12 AM, Hugh Brooks <hbap@aol.com> wrote:

The Mononobe-Okabe equations do not apply to restrained walls where activation movement is restricted.

For seismic lateral on restrained walls Retain Pro uses P = (soil density) x (k) x (retained height)^2. Application is approx. 0.60 x (retained height). This is a slightly trapezoidal loading but with only slight error a uniform loading could be assumed. K is the acceleration factor appropriate to the site.

See Kramer, Geotechnical Earthquake Engineering, Section 11.6.2.

Hugh Brooks, SE

Retain Pro Software

--
-gm

--

Tarek Mokhtar, SE
TMM Structural Engineers, Inc
31645 S. Coast Hwy
Laguna Beach, CA., 92651
949-499-6254
949-499-2777 Fax

--
-gm

Re: Seismic on restrained retaining walls

Gerard,

The 12' retaining wall exception appears in chapter 18A, DSA requirements, but disappears

in chapter 18. Further more section 15.6.1 appears to imply that all retaining walls shall

be designed with additional seismic loads. Does that mean that six or eight foot

retaining walls in backyards get additional seismic loads?

Tarek Mokhtar, SE

Laguna Beach, Ca

And the rule of thumb shall be to keep all of our retaining walls 11'-11" or less in height.

-gm

On Thu, Mar 20, 2008 at 9:12 AM, Hugh Brooks <hbap@aol.com> wrote:

The Mononobe-Okabe equations do not apply to restrained walls where activation movement is restricted.

For seismic lateral on restrained walls Retain Pro uses P = (soil density) x (k) x (retained height)^2. Application is approx. 0.60 x (retained height). This is a slightly trapezoidal loading but with only slight error a uniform loading could be assumed. K is the acceleration factor appropriate to the site.

See Kramer, Geotechnical Earthquake Engineering, Section 11.6.2.

Hugh Brooks, SE

Retain Pro Software

--
-gm

--

Tarek Mokhtar, SE
TMM Structural Engineers, Inc
31645 S. Coast Hwy
Laguna Beach, CA., 92651
949-499-6254
949-499-2777 Fax

Re: Vibration Problem

On Apr 25, 2008, at 3:18 AM, Swami Raviraj ((Mumbai - Civil)) wrote:

> when we start this compressor the structure also starts vibrating
> (& its really much more like earthquake at 25m level)
This isn't a trivil problem and you need someone who knows a good
deal about structural dynamics. Normally what's done is to find
what's actually vibrating and locate the excitation. It sounds like
you haven't done either.

Without a lot better description that you've provided there's no way
to determine even a starting point, but a modal analysis of the
structure will give you something to begin with. It may feel like the
whole thing is shaking, but what often happens is that some
relatively soft element (say, an unsupported length of pipe or a
motor on a soft foundation) is resonating and the reactions where it
connects are moving the rest of it. You may be able to find the soft
points by inspection and estimate the corresponding frequencies
manually if you know what you're about.

The source of the excitation is a little trickier. Unbalanced
rotating machinery is frequently at fault, and the fix is to
eliminate the imbalance. Snoop around for rotational frequencies that
correspond to some structural frequency. Flow-induced vibrations can
also be a problem. Sometimes you can change the speed of rotation to
shift the excitation frequency away from the structural resonance or
change the support conditions for whatever vibrates to shift the
structural frequency. Best bet, though, is to eliminate the source of
the excitation.

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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Re: Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

Thanks.

----- Original Message ----
From: Scott Maxwell <smaxwell@umich.edu>
To: seaint@seaint.org
Sent: Thursday, April 24, 2008 9:41:23 PM
Subject: RE: Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

See Table 11E in the 2005 NDS. That will give you capacity of the "wood side" of stuff. You still would need to check anchor bolt/rod values in the concrete itself, I believe (i.e. Appendix D of ACI 318 for concrete and the anchor bolt provisions in the MSJC/ACI 530).

Regards,

Scott

Adrian, MI

-----Original Message-----
From: Peter Maregan [mailto:pmaregan@yahoo.com]
Sent: Friday, April 25, 2008 12:03 AM
To: seaint@seaint.org
Subject: Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

Dear List Members,

Where do I find shear values for bolts in wood members attached to concrete or masonry?

In the good old days, when things were much simpler and "climate change" wasn't an issue<pun intended>, it used to be half the double shear value of a member twice the thickness of the actual member. I can't find that in the new code.

Any guidance is appreciated.

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

RE: Vibration Problem

Thanks Jordan,
The amplification by pipe itself is possible only when pipe is flexible.
& what will happen if pipe is rigid??
If we stiffen the rigid pipe, it may absorb all forces at the point where we connected it rigidly. And may cause more vibration in structure as pipe is only connected to main structure.

First of all we have find that, who is transmitting the vibrations?
If its compressor foundaion itself then, foundation isolation is the best way to reduce vibrations.

But if rigid pipe is rigidly connected to structure & transmitting the maximum vibration then what shall we do, to reduce the vibrations????
Can we provide another rigid support for pipe from outside the structure?

Regards,
Raviraj R. Swami
Tecnimont ICB,
Civil Dept.
Mumbai-400064
Office : +91-22-67777097

-----Original Message-----
From: Jordan Truesdell, PE [mailto:seaint2@truesdellengineering.com]
Sent: Friday, April 25, 2008 5:17 PM
To: seaint@seaint.org
Subject: Re: Vibration Problem

Sounds like you've got a resonance in the structure. You might need to
determine whether the pipe is amplifying the compressor vibration first.
If the pipe is increasing the amplitude of the compressor vibration, you
might be able to stiffen or (more likely at higher frequencies) dampen
the vibration at the pipe. Otherwise, you'll need to isolate the pump
from the structure, and possibly add a tank/baffle between the
compressor and pipe to reduce transmission of the compressor pulses in
your fluid (sorry, can't think of the correct term).

It may be possible to find and dampen the individual components which
are being excited, but you'll need a detailed FE model to get accurate
responses and to determine what the modal mass participation is of the
structure at that frequency to determine if it is large portions of the
structure instead of individual components.

Jordan

Swami Raviraj (Mumbai - Civil) wrote:
> In one of the process structure(in petroleum industries ) which is @ 60m high & plan dimensions 34 x 54m at bottom (with offset of 9 x 12m ) & reduced to 22x 20m(at top)
> It's RCC up to first level & steel above it.
> It's already erected at site (Operating condition)
> there is one big compressor at ground level (located at hardly 1 - 1.5m) from main structure.
> Two big pipes are coming from this compressors (900 dia) & entering in main structure at 25m level from ground level
> 3 supports are taken for pipe from main structure at intermediate levels.
>
> when we start this compressor the structure also starts vibrating (& its really much more like earthquake at 25m level)
>
> Now I have to check that why its happening & what are the remedial measures for it.
>
> So I need your suggestions for it
>
>
> Regards,
> Raviraj R. Swami
> Tecnimont ICB,
> Civil Dept.
> Mumbai-400064
>
>
>
>
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COMBINED FOOTING DESIGN

Hello Colleagues,
Is there anything in the ACI 318-05 (or any other building code, standard or specification) that you're aware of about the minimum separation between pedestals or columns in a combined footing? There has to be a maximum because of the assumptions of a rigid footing, but is there a minimum?

Thank you,

JJ

Make i'm yours. Create a custom banner to support your cause.

Re: Vibration Problem

Swami,

It is mainly a piping flexibility issue, rather than a mare structural straightening issue. One of the possibility to address this problem is to go for combined dynamic analysis for piping and structure model to reflect right structural stiffness of the structure, using ansys.

I would strongly advice involvement of rotating equipment specialist to investigate the compressor operating parameters Vs design parameters and look at the piping stress analysis for the support loads and support type considered in the structure design. This would give you a good hint on why it is happening.

One straight forward way of reducing the impact on the structure, is make the first support of these large pipes on the structures, a sliding support or a spring type support.

Best Regards

Lakshamana RK Nukala

On Fri, Apr 25, 2008 at 11:18 AM, Swami Raviraj (Mumbai - Civil) <R.Swami@ticb.com> wrote:

In one of the process structure(in petroleum industries ) which is @ 60m high & plan dimensions 34 x 54m at bottom (with offset of 9 x 12m ) & reduced to 22x 20m(at top)
It's RCC up to first level & steel above it.
It's already erected at site (Operating condition)
there is one big compressor at ground level (located at hardly 1 - 1.5m) from main structure.
Two big pipes are coming from this compressors (900 dia) & entering in main structure at 25m level from ground level
3 supports are taken for pipe from main structure at intermediate levels.

when we start this compressor the structure also starts vibrating (& its really much more like earthquake at 25m level)

Now I have to check that why its happening & what are the remedial measures for it.

So I need your suggestions for it

Regards,
Raviraj R. Swami
Tecnimont ICB,
Civil Dept.
Mumbai-400064

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Re: Vibration Problem

Jordan

> ******* ****** ****** ****** ******* ****** ****** ********
>
>

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Q-Basic program for design of open web steel joists

Thanks to all those who replied in regard to my program question. Since
then I have done a little research and have narrowed my choice down to 3
options. I will let you know.
Gary Hodgson

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Re: Vibration Problem

Swami,

It is hard to make any suggestions based on the information given.

The vibrations may propagate due to various reasons, and any decision
about mitigation activities should be made after a series of tests
that would include measuring the vibrations at various operating modes
of the compressor.
I would recommend bringing a dynamics professional on site to consult with.

For example, last year we investigated the 300MWt steam turbine
vibrations. The cause was a large horisontal crack in the concrete
foundation bottom below ground level, which was then grouted by
injection.

Do you have any image of the structure to post?

Regards, Alex.

On 4/25/08, Swami Raviraj (Mumbai - Civil) <R.Swami@ticb.com> wrote:
>
>
> In one of the process structure(in petroleum industries ) which is @ 60m high & plan dimensions 34 x 54m at bottom (with offset of 9 x 12m ) & reduced to 22x 20m(at top)
> It's RCC up to first level & steel above it.
> It's already erected at site (Operating condition)
> there is one big compressor at ground level (located at hardly 1 - 1.5m) from main structure.
> Two big pipes are coming from this compressors (900 dia) & entering in main structure at 25m level from ground level
> 3 supports are taken for pipe from main structure at intermediate levels.
>
> when we start this compressor the structure also starts vibrating (& its really much more like earthquake at 25m level)
>
> Now I have to check that why its happening & what are the remedial measures for it.
>
> So I need your suggestions for it
>
>
> Regards,
> Raviraj R. Swami
> Tecnimont ICB,
> Civil Dept.
> Mumbai-400064
>
>
>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> * This email was sent to you via Structural Engineers
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--
Alexander Bausk
CAD manager, Structural engineer at
Nuclear Engineering&Research Lab
Dnipropetrovsk, Ukraine

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Re: RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Don't be silly, Syed.

Syria, North Korea and Pakistan don't have oil.

Now South America...that Chavez guy is sitting on quite a bit...

Hmmmmmm

"Jamie, get Condi on the blower!"

> Syria is it now? Yes another fit case for US occupation. We have to take
> them out. And North Korea too should be punished for this. If there's
> enough troops sitting in Japan and South Korea, why not let them take out
> NK as well. Then Iran, for its cheek. Followed by Pakistan, unless of
> course they let our chosen dictator stay on.
>
> Guess you should just occupy the whole of Middle East, followed by East
> Asia, .. then I think South America.. Having more war budget than rest of
> the world combined does have some advantages.
>
> Syed A Masroor
> Consulting Structural Engineer
> Karachi, Pakistan
>
> ----- Original Message -----
> From: Michel Blangy <mblangy@satco-inc.com>
> Date: Thursday, April 24, 2008 9:38 pm
> Subject: RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His
> Views
>
>> What if today's news about Syria proves true? Would that be sufficient
>> evidence to prompt gaining a foothold in the region? Syria is not
>> doing this
>> because of Bush or the Neo-Cons.
>>
>>
>>
>> > Mr. Bush and the Neo-Cons got us into a
>> > pre-emptive war
>> > Based on falsified intelligence, that's all.
>>
>>
>>
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>> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
>> *
>> * This email was sent to you via Structural Engineers
>> * Association of Southern California (SEAOSC) server. To
>> * subscribe (no fee) or UnSubscribe, please go to:
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>> *
>> * Questions to seaint-ad@seaint.org. Remember, any email you
>> * send to the list is public domain and may be re-posted
>> * without your permission. Make sure you visit our web
>> * site at: http://www.seaint.org
>> ******* ****** ****** ****** ******* ****** ****** ********
>>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
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Vibration Problem

In one of the process structure(in petroleum industries ) which is @ 60m high & plan dimensions 34 x 54m at bottom (with offset of 9 x 12m ) & reduced to 22x 20m(at top)
It's RCC up to first level & steel above it.
It's already erected at site (Operating condition)
there is one big compressor at ground level (located at hardly 1 - 1.5m) from main structure.
Two big pipes are coming from this compressors (900 dia) & entering in main structure at 25m level from ground level
3 supports are taken for pipe from main structure at intermediate levels.

when we start this compressor the structure also starts vibrating (& its really much more like earthquake at 25m level)

Now I have to check that why its happening & what are the remedial measures for it.

So I need your suggestions for it

Regards,
Raviraj R. Swami
Tecnimont ICB,
Civil Dept.
Mumbai-400064

Thursday, April 24, 2008

Re: RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Syria is it now? Yes another fit case for US occupation. We have to take them out. And North Korea too should be punished for this. If there's enough troops sitting in Japan and South Korea, why not let them take out NK as well. Then Iran, for its cheek. Followed by Pakistan, unless of course they let our chosen dictator stay on.

Guess you should just occupy the whole of Middle East, followed by East Asia, .. then I think South America.. Having more war budget than rest of the world combined does have some advantages.

Syed A Masroor
Consulting Structural Engineer
Karachi, Pakistan

----- Original Message -----
From: Michel Blangy <mblangy@satco-inc.com>
Date: Thursday, April 24, 2008 9:38 pm
Subject: RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

> What if today's news about Syria proves true? Would that be sufficient
> evidence to prompt gaining a foothold in the region? Syria is not
> doing this
> because of Bush or the Neo-Cons.
>
>
>
> > Mr. Bush and the Neo-Cons got us into a
> > pre-emptive war
> > Based on falsified intelligence, that's all.
>
>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> * This email was sent to you via Structural Engineers
> * Association of Southern California (SEAOSC) server. To
> * subscribe (no fee) or UnSubscribe, please go to:
> *
> *

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>

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RE: Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

Regards,

Scott

Adrian, MI

-----Original Message-----
From: Peter Maregan [mailto:pmaregan@yahoo.com]
Sent: Friday, April 25, 2008 12:03 AM
To: seaint@seaint.org
Subject: Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

Dear List Members,

Where do I find shear values for bolts in wood members attached to concrete or masonry?

In the good old days, when things were much simpler and "climate change" wasn't an issue<pun intended>, it used to be half the double shear value of a member twice the thickness of the actual member. I can't find that in the new code.

Any guidance is appreciated.

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

Re: knocked off again

Dennis:

I didn't realize than anybody was still stuck with DSL. If possible,
you should upgrade immediately to Verizon FiOS. It brings fiber optic
right up the wall of your house with a great big pipe and incredible
reliability. After having it for a year or so, I cut and removed my
telephone line and my cable TV line. My internet, four HDTVs, and
local/long distance telephone services are all bundled on FiOS now.

I also second Gerard's recommendation of getting a free gmail account
for the SEAINT listserv. With automatic threading,excellent spam
control, and access from anywhere, it is ideal for this purpose.

Regards,

Stan Caldwell
Plano, Texas

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Confession:
I drive a Ford Expedition and my son drives a Ford Expedition XL.
My wife and my daughter each drive Jeep Grand Cherokees.
We have three big houses, with seven furnaces and air conditioners,
and three heated pools.
But all of us routinely recycle, and our combined carbon footprint is
still tiny
when compared to Al Gore's, Hillary Clinton's, or Barrack Obama's.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

On Thu, Apr 24, 2008 at 9:48 PM, Dennis Wish <dennis.wish@verizon.net> wrote:
>
>
>
> I use a Fiber Optic's line from Verizon so it cannot be the size of the
> storage since all of my e-mail is erased from the server after download and
> emptying of my junk and erased mail. Once read, it is taken off the server
> and saved on my computer. This still leaves me a couple of gig's of storage
> on the Verizon Yahoo web mail attached to my Verizon FiOS account. Still I
> get bumped and did when I had a DSL line from Verizon as well.
>
>
>
> I don't think it is the content or the account – it might be the length of
> the post or the format (mine generally get sent in HTML format). This might
> be the reason as I use formatted text (subscripts, bold text, etc. ) rather
> than RTF or ASCII format.
>
>
>
> Who knows J
>
> Dennis
>
>
>
>
> From: Gerard Madden, SE [mailto:gmse4603@gmail.com]
> Sent: Thursday, April 24, 2008 1:27 PM
> To: seaint@seaint.org
> Subject: Re: knocked off again
>
>
>
> My experience has been the same as Scott's.
>
> I strongly suggest you use a dedicated email only for SEAINT stuff. The
> gmail one I use works great and will never run out of room and I can find
> stuff quickly by keyword search.
>
> -gm
>
>
> On Thu, Apr 24, 2008 at 1:06 PM, Scott Maxwell <smaxwell@umich.edu> wrote:
>
>
> Haven't had any noticeable problems recently. There have been few stretches
> of what seems like relatively light traffic (around the 11th or so and about
> the 20th of this month). But everything seems to be coming through to me
> (at least based upon a comparison of the SEAINT archives and what I have
> sitting on my email client - and yes, I am a packrat so, I have quite a lot
> of the messages still sitting there). And I am NOT a SEAOC (or any other
> SEA) member, so I doubt that has anything to do with it.
>
>
>
>
>
> Regards,
>
>
>
>
>
> Scott
>
>
> Adrian, MI
>
>
>
> -----Original Message-----
> From: Dennis Wish [mailto:dennis.wish@verizon.net]
> Sent: Thursday, April 24, 2008 3:19 PM
> To: seaint@seaint.org
> Subject: knocked off again
>
>
> For some reason, I have not received a copy of my posts to the list from the
> last two days. This has been happening quite frequently lately and I am
> aware that it has occurred a few times, but in the last month I've been
> unsubscribed twice, and the list has been down once for nearly four days.
> Are others experiencing these problems? Can it be that I choose not to be a
> member of SEA that I am being removed from the list (that I co-founded
> nearly 13-years ago) or is it just a strange coincidence?
>
>
>
> A few of you have e-mailed me to alert me that you have had problems with
> the list and I suggested you re-subscribe. I've done this again (the third
> time in a month) and am going to try and post this even though I am waiting
> for a confirmation.
>
>
>
> No conspiracy theories here – but it is rather unusual for the list server
> to keep dumping frequent users off the list. I hope it is not censorship,
> but then I don't receive a response when I ask for an explanation J
>
>
>
> If you have had this happen, please let SEAINT.ORG know this by bringing it
> to the attention of the list members in order to try and find out the
> frequency that this is occurring; either in mail mode or digest mode.
>
>
>
> Thanks
>
> Dennis
>
>
>
> Dennis S. Wish, PE
>
>
>
> Dennis S. Wish, PE
>
> California Professional Engineer
>
> C-41250 Exp. 3/31/09
>
> Structural Engineering Consultant
>
> 54625 Avenida Bermudas
>
> La Quinta, CA 92253
>
> 760.564.0884 (Phone, Fax and Answering Machine)
>
> dennis.wish@verizon.net
>
> http://structuralist.wordpress.com
>
> http://www.structuralist.net
>
>
>
>
>
>
> --
> -gm

Allowable Bolt Shear Values for Wood Members Attached to Concrete or Masonry

Dear List Members,

Where do I find shear values for bolts in wood members attached to concrete or masonry?

In the good old days, when things were much simpler and "climate change" wasn't an issue<pun intended>, it used to be half the double shear value of a member twice the thickness of the actual member. I can't find that in the new code.

Any guidance is appreciated.

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

RE: knocked off again

I use a Fiber Optic’s line from Verizon so it cannot be the size of the storage since all of my e-mail is erased from the server after download and emptying of my junk and erased mail. Once read, it is taken off the server and saved on my computer. This still leaves me a couple of gig’s of storage on the Verizon Yahoo web mail attached to my Verizon FiOS account. Still I get bumped and did when I had a DSL line from Verizon as well.

I don’t think it is the content or the account – it might be the length of the post or the format (mine generally get sent in HTML format). This might be the reason as I use formatted text (subscripts, bold text, etc. ) rather than RTF or ASCII format.

Who knows J

Dennis

From: Gerard Madden, SE [mailto:gmse4603@gmail.com]
Sent: Thursday, April 24, 2008 1:27 PM
To: seaint@seaint.org
Subject: Re: knocked off again

My experience has been the same as Scott's.

I strongly suggest you use a dedicated email only for SEAINT stuff. The gmail one I use works great and will never run out of room and I can find stuff quickly by keyword search.

-gm

On Thu, Apr 24, 2008 at 1:06 PM, Scott Maxwell <smaxwell@umich.edu> wrote:

Haven't had any noticeable problems recently. There have been few stretches of what seems like relatively light traffic (around the 11th or so and about the 20th of this month). But everything seems to be coming through to me (at least based upon a comparison of the SEAINT archives and what I have sitting on my email client - and yes, I am a packrat so, I have quite a lot of the messages still sitting there). And I am NOT a SEAOC (or any other SEA) member, so I doubt that has anything to do with it.

Regards,

Scott

Adrian, MI

-----Original Message-----
From: Dennis Wish [mailto:dennis.wish@verizon.net]
Sent: Thursday, April 24, 2008 3:19 PM
To: seaint@seaint.org
Subject: knocked off again

For some reason, I have not received a copy of my posts to the list from the last two days. This has been happening quite frequently lately and I am aware that it has occurred a few times, but in the last month I've been unsubscribed twice, and the list has been down once for nearly four days. Are others experiencing these problems? Can it be that I choose not to be a member of SEA that I am being removed from the list (that I co-founded nearly 13-years ago) or is it just a strange coincidence?

A few of you have e-mailed me to alert me that you have had problems with the list and I suggested you re-subscribe. I've done this again (the third time in a month) and am going to try and post this even though I am waiting for a confirmation.

No conspiracy theories here – but it is rather unusual for the list server to keep dumping frequent users off the list. I hope it is not censorship, but then I don't receive a response when I ask for an explanation J

If you have had this happen, please let SEAINT.ORG know this by bringing it to the attention of the list members in order to try and find out the frequency that this is occurring; either in mail mode or digest mode.

Thanks

Dennis

Dennis S. Wish, PE

Dennis S. Wish, PE

California Professional Engineer

C-41250 Exp. 3/31/09

Structural Engineering Consultant

54625 Avenida Bermudas

La Quinta, CA 92253

760.564.0884 (Phone, Fax and Answering Machine)

dennis.wish@verizon.net

http://structuralist.wordpress.com

http://www.structuralist.net

--
-gm

RE: knocked off again

Me too. I thought it was as punishment.

Michel

Hazus Earthquake Survivability Study

Hi;
I have an RFP from one of my Architectural clients that asks us to
"Perform Initial HAZUS (FEMA Hazards United States Risk Assessment)
Earthquake Survivability Study".
I have found the website that explains it at
http://www.fema.gov/plan/prevent/hazus/hz_eq.shtm

. I was wondering if any
California licensed SE that has performed this study could email me so we
could discuss it. I really have no idea how much time and expertise
something like this would take to complete.
Thanks in advance,

Terry Weatherby
Weatherby-Reynolds-Fritson
Engineering and Design
Jackson, California

******* ****** ****** ****** ******* ****** ****** ********

Re: knocked off again

On Thu, Apr 24, 2008 at 1:06 PM, Scott Maxwell <smaxwell@umich.edu> wrote:

Haven't had any noticeable problems recently. There have been few stretches of what seems like relatively light traffic (around the 11th or so and about the 20th of this month). But everything seems to be coming through to me (at least based upon a comparison of the SEAINT archives and what I have sitting on my email client - and yes, I am a packrat so, I have quite a lot of the messages still sitting there). And I am NOT a SEAOC (or any other SEA) member, so I doubt that has anything to do with it.

Regards,

Scott

Adrian, MI

-----Original Message-----
From: Dennis Wish [mailto:dennis.wish@verizon.net]
Sent: Thursday, April 24, 2008 3:19 PM
To: seaint@seaint.org
Subject: knocked off again

For some reason, I have not received a copy of my posts to the list from the last two days. This has been happening quite frequently lately and I am aware that it has occurred a few times, but in the last month I've been unsubscribed twice, and the list has been down once for nearly four days. Are others experiencing these problems? Can it be that I choose not to be a member of SEA that I am being removed from the list (that I co-founded nearly 13-years ago) or is it just a strange coincidence?

A few of you have e-mailed me to alert me that you have had problems with the list and I suggested you re-subscribe. I've done this again (the third time in a month) and am going to try and post this even though I am waiting for a confirmation.

No conspiracy theories here – but it is rather unusual for the list server to keep dumping frequent users off the list. I hope it is not censorship, but then I don't receive a response when I ask for an explanation J

If you have had this happen, please let SEAINT.ORG know this by bringing it to the attention of the list members in order to try and find out the frequency that this is occurring; either in mail mode or digest mode.

Thanks

Dennis

Dennis S. Wish, PE

Dennis S. Wish, PE

California Professional Engineer

C-41250 Exp. 3/31/09

Structural Engineering Consultant

54625 Avenida Bermudas

La Quinta, CA 92253

760.564.0884 (Phone, Fax and Answering Machine)

dennis.wish@verizon.net

http://structuralist.wordpress.com

http://www.structuralist.net

--
-gm

RE: knocked off again

Regards,

Scott

Adrian, MI

-----Original Message-----
From: Dennis Wish [mailto:dennis.wish@verizon.net]
Sent: Thursday, April 24, 2008 3:19 PM
To: seaint@seaint.org
Subject: knocked off again

For some reason, I have not received a copy of my posts to the list from the last two days. This has been happening quite frequently lately and I am aware that it has occurred a few times, but in the last month I’ve been unsubscribed twice, and the list has been down once for nearly four days. Are others experiencing these problems? Can it be that I choose not to be a member of SEA that I am being removed from the list (that I co-founded nearly 13-years ago) or is it just a strange coincidence?

A few of you have e-mailed me to alert me that you have had problems with the list and I suggested you re-subscribe. I’ve done this again (the third time in a month) and am going to try and post this even though I am waiting for a confirmation.

No conspiracy theories here – but it is rather unusual for the list server to keep dumping frequent users off the list. I hope it is not censorship, but then I don’t receive a response when I ask for an explanation J

If you have had this happen, please let SEAINT.ORG know this by bringing it to the attention of the list members in order to try and find out the frequency that this is occurring; either in mail mode or digest mode.

Thanks

Dennis

Dennis S. Wish, PE

Dennis S. Wish, PE

California Professional Engineer

C-41250 Exp. 3/31/09

Structural Engineering Consultant

54625 Avenida Bermudas

La Quinta, CA 92253

760.564.0884 (Phone, Fax and Answering Machine)

dennis.wish@verizon.net

http://structuralist.wordpress.com

http://www.structuralist.net

ASTM Request

Does anyone have a copy of the ASTM 2004 F-1918 Section 8.1.5.17 (Playground Equipment) that they could fax or email to me?

D. Matthew Stuart, P.E., S.E., F.ASCE, SECB

Senior Project Manager

Structural Department

Associate

CMX

200 Route 9

Manalapan, NJ 07726

732-577-9000 (Ext. 1285)

908-309-8657 (Cell)

732-298-9441 (Fax)

mstuart@CMXEngineering.com

knocked off again

For some reason, I have not received a copy of my posts to the list from the last two days. This has been happening quite frequently lately and I am aware that it has occurred a few times, but in the last month I’ve been unsubscribed twice, and the list has been down once for nearly four days. Are others experiencing these problems? Can it be that I choose not to be a member of SEA that I am being removed from the list (that I co-founded nearly 13-years ago) or is it just a strange coincidence?

A few of you have e-mailed me to alert me that you have had problems with the list and I suggested you re-subscribe. I’ve done this again (the third time in a month) and am going to try and post this even though I am waiting for a confirmation.

No conspiracy theories here – but it is rather unusual for the list server to keep dumping frequent users off the list. I hope it is not censorship, but then I don’t receive a response when I ask for an explanation J

If you have had this happen, please let SEAINT.ORG know this by bringing it to the attention of the list members in order to try and find out the frequency that this is occurring; either in mail mode or digest mode.

Thanks

Dennis

Dennis S. Wish, PE

California Professional Engineer

C-41250 Exp. 3/31/09

Structural Engineering Consultant

54625 Avenida Bermudas

La Quinta, CA 92253

760.564.0884 (Phone, Fax and Answering Machine)

dennis.wish@verizon.net

http://structuralist.wordpress.com

http://www.structuralist.net

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

According to what I heard on the BBC, the reactor they have
From North Korea is for power generation only and they do not have
sufficient
Facilities/technical expertese to separate/harvest plutonium from it to make
weapons.

David L. Fisher SE PE
Senior Director

The Fisher Companies 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.thefishercompanies.com
www.fpse.com

"England expects every officer and man to do his duty this day."

- Admiral Horatio Nelson
HMS Victory
Trafalgar 1805

-----Original Message-----
From: Michel Blangy [mailto:mblangy@satco-inc.com]
Sent: Thursday, April 24, 2008 10:39 AM
To: seaint@seaint.org
Subject: RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

What if today's news about Syria proves true? Would that be sufficient
evidence to prompt gaining a foothold in the region? Syria is not doing this
because of Bush or the Neo-Cons.

> Mr. Bush and the Neo-Cons got us into a
> pre-emptive war
> Based on falsified intelligence, that's all.

******* ****** ****** ****** ******* ****** ****** ********

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

What if today's news about Syria proves true? Would that be sufficient
evidence to prompt gaining a foothold in the region? Syria is not doing this
because of Bush or the Neo-Cons.

> Mr. Bush and the Neo-Cons got us into a
> pre-emptive war
> Based on falsified intelligence, that's all.

******* ****** ****** ****** ******* ****** ****** ********

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Bill:

You strike me as a bright, well read guy, but some of the things you post
just make
Me shake my head.

I was not saying anything disparaging about this country.

I was simply stating fact: Mr. Bush and the Neo-Cons got us into a
pre-emptive war
Based on falsified intelligence, that's all.

David L. Fisher SE PE
Senior Director

The Fisher Companies 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.thefishercompanies.com
www.fpse.com

"England expects every officer and man to do his duty this day."

- Admiral Horatio Nelson
HMS Victory
Trafalgar 1805

-----Original Message-----
From: Bill Polhemus [mailto:bill@polhemus.cc]
Sent: Wednesday, April 23, 2008 9:03 PM
To: seaint@seaint.org
Subject: Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

David Fisher wrote:
> It did however, show the rest of the world that the US doesn't really give
a
> **** about the environment.
Oh, and you forgot to mention that the U.S. is the world's greatest
"terrorist," and has done more to kill people who are darker than George
W. Bush, than anyone since Hitler. Well, Hitler didn't last as long,
come to think of it.

Evil, rotten, DESPICABLE United States! One-third of the economic output
of the world, pshaw!

******* ****** ****** ****** ******* ****** ****** ********

Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Bill,
I'm not assuming anything. I'm just repeating quotes from both US and
Canadian sources. I don't disagree with your statement about the USA
developing technology for these problems ( 90%?)-that's why I said the
US states have done more to reduce pollution than Canada. It only makes
sense that the US is the largest polluter in the world. It has the
largest economy and has had that for many years (80-100?) so the extent
of pollution is going to be large. Now you are doing something about
it. So I don't understand what you are rejecting.
Gary

Bill Polhemus wrote:
> Gary L. Hodgson and Assoc. wrote:
>> The United States is the largest polluter in the world,...
> Air, water and earth are cleaner now than fifty years ago (don't know
> about fire). And why? 90% of the technology was developed in the good
> ol' US of A.
>
> I reject your fundamental assumption.
>
> ******* ****** ******* ******** ******* ******* ******* ***
> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> * * This email was sent to you via Structural Engineers *
> Association of Southern California (SEAOSC) server. To * subscribe
> (no fee) or UnSubscribe, please go to:
> *
> *

http://www.seaint.org/sealist1.asp
> *
> * Questions to seaint-ad@seaint.org. Remember, any email you *
> send to the list is public domain and may be re-posted * without
> your permission. Make sure you visit our web * site at:
> http://www.seaint.org ******* ****** ****** ****** ******* ******
> ****** ********

******* ****** ****** ****** ******* ****** ****** ********

Scott Threewitt is out of the office.

I will be out of the office starting Thu 04/24/2008 and will not return
until Mon 04/28/2008.

I will respond to your message when I return.

******* ****** ****** ****** ******* ****** ****** ********

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

And how is "shouting" someone down by labelling them as a "wacko" or
"environut" any different than "purging"? I would argue you labelling
people as something or "demonizing" them rather than engaging them on the
issue is just as stiffling of debate as if someone pressures you over your
job. Just ask all the people who have been called unpatriotic or told that
they don't support the troops just because they disagree with the Iraq war.
How long was that debate stiffled because if you dared to voice concerns
over the war you all of a sudden where unpatriotic or did not support the
troops?

Regards,

Scott
Adrian, MI

-----Original Message-----
From: Bill Polhemus [mailto:bill@polhemus.cc]
Sent: Wednesday, April 23, 2008 11:16 PM
To: seaint@seaint.org
Subject: Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Scott Maxwell wrote:
> And you are "debating"? I don't consider calling people whose views
> you disagree with as "enviro-crazies" as "debating".
>
Scott, the thing is that it's now impossible to be just a "reasonable"
environmental scientist. You have got to have "religion." You have to be
a zealot. If you aren't extreme enough, you are "purged," just as George
Taylor was in Oregon.

I'm sorry if you think that doesn't rise to the level of "whacko," but
that's the way I see it.

******* ****** ****** ****** ******* ****** ****** ********

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

But are you able to put up ANY article (whether from "radical
enviromentalist fish-wrap" or some ultra-conservative blog or paper) that
have any DEFINITIVE stuff about whether he was pressured or not? Your
response reinforces my position...you had a preconieved notion of the
situation that he was pressured and thus chose to see in that article
confirmation of that belief because of the "type" of paper that the article
was published in. The point is that I have yet to see any definitive facts
that shows he was pressured. Everything you have presents has been either
speculation or stuff that can be interpreted in multiple ways.

Regards,

Scott
Adrian, MI

-----Original Message-----
From: Bill Polhemus [mailto:bill@polhemus.cc]
Sent: Wednesday, April 23, 2008 11:18 PM
To: seaint@seaint.org
Subject: Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Scott Maxwell wrote:
> As to the political factors, I would argue that there is absolutely
> ZERO definitive stuff about whether he was pressured due to his
> views...other that what you read into it. In fact, the only
> definitive thing was that he said "I don't believe the governor purged
> me". Anything else is pure speculation.
>
Keep in mind that this article is published in a radical
environmentalist fish-wrap. Just read the interviewer's questions. Sheesh.

******* ****** ****** ****** ******* ****** ****** ********

Wednesday, April 23, 2008

RE: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Sorry! You have to unsubscribe your self. Look at the bottom of Bill’s posts it tells you how to do so.

Regards

Conrad Harrison

B.Tech (mfg & mech), MIIE, gradTIEAust

mailto:sch.tectonic@bigpond.com

Adelaide

South Australia

From: satya prasad [mailto:kaliprasadvs@yahoo.com]
Sent: Thursday, 24 April 2008 13:01
To: seaint@seaint.org
Subject: Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

please unsubscribe me from your list.

I will visit web site often.

kaliprasad

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

please unsubscribe me from your list.

I will visit web site often.

kaliprasad

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

Re: Earth Day, Then and Now ...

Donald Bruckman wrote:
> All I can say is, good thing some of the more progressive among us heeded
> the predictions and did something.
>
The notion that "progressives" are the ones responsible for
environmental "progress" is laughable.

Ask anyone who ever lived in East Germany and drove a Trabant.

******* ****** ****** ****** ******* ****** ****** ********

Re: Earth Day, Then and Now ...

Jordan Truesdell, PE wrote:
> Ya'll have way too much free time. Don't you people have structures to
> design?
Why bother?

The Ice Age is upon us.

(Dang, I KNEW I should have subscribed to the "Cold Regions" ASCE
journal...)

******* ****** ****** ****** ******* ****** ****** ********

Re: ITEM: Oregon State Climatologist "Wasn't Purged" for His Views

Scott Maxwell wrote:
> As to the political factors, I would argue that there is absolutely ZERO
> definitive stuff about whether he was pressured due to his views...other
> that what you read into it. In fact, the only definitive thing was that he
> said "I don't believe the governor purged me". Anything else is pure
> speculation.
>
Keep in mind that this article is published in a radical
environmentalist fish-wrap. Just read the interviewer's questions. Sheesh.

******* ****** ****** ****** ******* ****** ****** ********