Saturday, October 24, 2009

Re: R for knee brace

To address the original R value question, I would recommend the same
for a knee braced frame as a moment resisting frame because they
respond more like a MRF than a braced frame.


- Jeremy

Quoting Jnapd@aol.com:

> If that's the case see if the Simpson bolt up frames will fit, they will be
> cheaper than welding.
>
> Joe Venuti
> Johnson & Nielsen Associates
> Palm Springs, CA
>
>
> In a message dated 10/23/2009 8:23:58 P.M. Pacific Daylight Time,
> leenlee_front@leenlee.net writes:
>
>
>
> Because there are existing ramp and SOG it is impossible to have can
> cantilevered column system. So it should be pinned connection at
> bottom of steel
> columns.
>
>
> In my opinion it will be O.K. to use OMRF at both directions because OMRF
> does not required pre-qualified connections. What do you think about this?
>
>
> Thanks.
>
>
> S&H
>
>
> LA, CA
>
>
>
>
>
>
>
> ____________________________________
> From: "jrgrill@cableone.net" <jrgrill@cableone.net>
> To: seaint@seaint.org
> Sent: Fri, October 23, 2009 7:23:02 PM
> Subject: Re: R for knee brace
>
> And if they were to be timber?
> Joe grill
> Sent from my Verizon Wireless BlackBerry
> ____________________________________
>
> From: Jnapd@aol.com
> Date: Fri, 23 Oct 2009 21:54:42 EDT
> To: <seaint@seaint.org>
> Subject: Re: R for knee brace
>
>
> Dave
>
> I would probably treat it like a Cantilevered Column and use 2.5
>
> Joe Venuti
> Johnson & Nielsen Associates
> Palm Springs, CA
>
>
> In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time,
> d.topete73@gmail.com writes:
>
> the columns are steel.
>
> On Fri, Oct 23, 2009 at 4:44 PM, <_Jnapd@aol.com_ (mailto:Jnapd@aol.com) >
> wrote:
>
>
> Are columns steel or wood ??
>
> Joe Venuti
> Johnson & Nielsen Associates
> Palm Springs, CA
>
>
>
>
>
> In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time,
> _leenlee_front@leenlee.net_ (mailto:leenlee_front@leenlee.net) writes:
>
> Hello, all
>
> I have small canopy project, 40' x 16' x 10' high having 4 steel columns
> at corner. OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at
> trasverse direction and I will have L shape knee braces at longitudinal
> direction. But I have no idea what R value is suitable for this
> knee bracing.
> Please give me some idea.
> Thanks in advance.
>
> LA, CA
>
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> --
> David Topete, SE
>
>
>
>
>
>
>
>
>
>
>

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Re: R for knee brace

If that's the case see if the Simpson bolt up frames will fit, they will be cheaper than welding.
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 8:23:58 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Because there are existing ramp and SOG it is impossible to have can cantilevered column system. So it should be pinned connection at bottom of steel columns.

In my opinion it will be O.K. to use OMRF at both directions because OMRF does not required pre-qualified connections. What do you think about this? 

Thanks.

S&H

LA, CA




From: "jrgrill@cableone.net" <jrgrill@cableone.net>
To: seaint@seaint.org
Sent: Fri, October 23, 2009 7:23:02 PM
Subject: Re: R for knee brace

And if they were to be timber?
Joe grill

Sent from my Verizon Wireless BlackBerry


From: Jnapd@aol.com
Date: Fri, 23 Oct 2009 21:54:42 EDT
To: <seaint@seaint.org>
Subject: Re: R for knee brace

Dave
 
I would probably treat it like a Cantilevered Column  and use 2.5
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:
 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:
Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

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David Topete, SE

Re: R for knee brace

So how long does it take to drink 5 gals
I use 2.0 for timber but that is for a trellis structure.  For solid roofs I use steel columns.  In your area I may use wood post because you are in low seismic.
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 10:17:50 P.M. Pacific Daylight Time, jrgrill@cableone.net writes:

Typing now from a keyboard instead of my "Crackberry".  I have done some cantilevered timber columns in the past, but I was never very crazy about them due to shrinkage.  I tried to limit them to small miscellaneous structures, cupola sort of things.  I do believe, (and I realize that the original question was regarding steel) the ASCE gives an R=1.5 for a "timber frame".  Personally, I think that is a bit punitive, but see the politics of "R" thread a couple of weeks ago.  That's why I ask the question.  Hoping for a bit of discussion on timber frames.  Sorry for throwing the timber thing into a steel discussion.  One more of my home made brews and I wouldn't have even checked my email.

 

Yes I have listened to all the beer discussions in the past.  I gave up buying except for the cheap store bought while I'm mowing the lawn stuff.  My wife bought me a home brewing kit last winter.  5 gallons at a time.  Da?! Good stuff.

 

Joe Grill

 

From: leenlee_front [mailto:leenlee_front@leenlee.net]
Sent: Friday, October 23, 2009 8:09 PM
To: seaint@seaint.org
Subject: Re: R for knee brace

 

Because there are existing ramp and SOG it is impossible to have can cantilevered column system. So it should be pinned connection at bottom of steel columns.

 

In my opinion it will be O.K. to use OMRF at both directions because OMRF does not required pre-qualified connections. What do you think about this? 

 

Thanks.

 

S&H

 

LA, CA

 

 

 


From: "jrgrill@cableone.net" <jrgrill@cableone.net>
To: seaint@seaint.org
Sent: Fri, October 23, 2009 7:23:02 PM
Subject: Re: R for knee brace

And if they were to be timber?
Joe grill

Sent from my Verizon Wireless BlackBerry


From: Jnapd@aol.com

Date: Fri, 23 Oct 2009 21:54:42 EDT

To: <seaint@seaint.org>

Subject: Re: R for knee brace

 

Dave

 

I would probably treat it like a Cantilevered Column  and use 2.5

 

Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 

In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:

 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:

Are columns steel or wood ??

 

Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 

 

In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:

Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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--
David Topete, SE

shear lug

Good morning,
 
Need to resist an unfactored shear force of about 38K at the baseplate level, anchor bolts not an option, thinking about embedding an HSS (say, 8x8x1/2).
Any ideas, suggestions, references for shear lug design?
TIA,
 
Steve Gordin, SE
 

Re: seaint Digest for 23 Oct 2009

Gary,
IRC/NRC's CCMC provides evaluation services for products used in conformance
with the NBCC.

Regards
Paul
--
Paul Ransom, P.Eng.
ph 905 639-9628
fax 905 639-3866
ad026@hwcn.org

> From: "Gary L. Hodgson and Assoc." <design@hodgsoneng.ca>
> To: SEAINT Mail List <seaint@seaint.org>
> Subject: IBC Loads for Guard Rail
>
> List,
>
> I wonder if anybody can help me. I have a customer who makes composite
> plastic and wood guard rails. He's had them evaluated in the US at ICC
> Evaluation Services Inc. and the issued report makes reference to the
> IBC. However, we don't use the IBC up here in Canada.
>
> Can anybody tell me what the loads and clause numbers are in the IBC for
> guard rails for houses or small buildings?
>
> thanks,
> Gary


******* ****** ******* ******** ******* ******* ******* ***
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Friday, October 23, 2009

RE: R for knee brace

Typing now from a keyboard instead of my “Crackberry”.  I have done some cantilevered timber columns in the past, but I was never very crazy about them due to shrinkage.  I tried to limit them to small miscellaneous structures, cupola sort of things.  I do believe, (and I realize that the original question was regarding steel) the ASCE gives an R=1.5 for a “timber frame”.  Personally, I think that is a bit punitive, but see the politics of “R” thread a couple of weeks ago.  That’s why I ask the question.  Hoping for a bit of discussion on timber frames.  Sorry for throwing the timber thing into a steel discussion.  One more of my home made brews and I wouldn’t have even checked my email.

 

Yes I have listened to all the beer discussions in the past.  I gave up buying except for the cheap store bought while I’m mowing the lawn stuff.  My wife bought me a home brewing kit last winter.  5 gallons at a time.  Da?! Good stuff.

 

Joe Grill

 

From: leenlee_front [mailto:leenlee_front@leenlee.net]
Sent: Friday, October 23, 2009 8:09 PM
To: seaint@seaint.org
Subject: Re: R for knee brace

 

Because there are existing ramp and SOG it is impossible to have can cantilevered column system. So it should be pinned connection at bottom of steel columns.

 

In my opinion it will be O.K. to use OMRF at both directions because OMRF does not required pre-qualified connections. What do you think about this? 

 

Thanks.

 

S&H

 

LA, CA

 

 

 


From: "jrgrill@cableone.net" <jrgrill@cableone.net>
To: seaint@seaint.org
Sent: Fri, October 23, 2009 7:23:02 PM
Subject: Re: R for knee brace

And if they were to be timber?
Joe grill

Sent from my Verizon Wireless BlackBerry


From: Jnapd@aol.com

Date: Fri, 23 Oct 2009 21:54:42 EDT

To: <seaint@seaint.org>

Subject: Re: R for knee brace

 

Dave

 

I would probably treat it like a Cantilevered Column  and use 2.5

 

Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 

In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:

 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:

Are columns steel or wood ??

 

Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 

 

In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:

Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
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*   This email was sent to you via Structural Engineers
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--
David Topete, SE

Re: R for knee brace

Because there are existing ramp and SOG it is impossible to have can cantilevered column system. So it should be pinned connection at bottom of steel columns.

In my opinion it will be O.K. to use OMRF at both directions because OMRF does not required pre-qualified connections. What do you think about this? 

Thanks.

S&H

LA, CA




From: "jrgrill@cableone.net" <jrgrill@cableone.net>
To: seaint@seaint.org
Sent: Fri, October 23, 2009 7:23:02 PM
Subject: Re: R for knee brace

And if they were to be timber?
Joe grill

Sent from my Verizon Wireless BlackBerry


From: Jnapd@aol.com
Date: Fri, 23 Oct 2009 21:54:42 EDT
To: <seaint@seaint.org>
Subject: Re: R for knee brace

Dave
 
I would probably treat it like a Cantilevered Column  and use 2.5
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:
 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:
Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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--
David Topete, SE

Re: R for knee brace

And if they were to be timber?
Joe grill

Sent from my Verizon Wireless BlackBerry


From: Jnapd@aol.com
Date: Fri, 23 Oct 2009 21:54:42 EDT
To: <seaint@seaint.org>
Subject: Re: R for knee brace

Dave
 
I would probably treat it like a Cantilevered Column  and use 2.5
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:
 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:
Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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--
David Topete, SE

Re: R for knee brace

Dave
 
I would probably treat it like a Cantilevered Column  and use 2.5
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 5:11:25 P.M. Pacific Daylight Time, d.topete73@gmail.com writes:
 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:
Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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--
David Topete, SE

Re: R for knee brace

 the columns are steel.

On Fri, Oct 23, 2009 at 4:44 PM, <Jnapd@aol.com> wrote:
Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
*   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
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--
David Topete, SE

Re: R for knee brace

Are columns steel or wood ??
 
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
 
In a message dated 10/23/2009 2:40:45 P.M. Pacific Daylight Time, leenlee_front@leenlee.net writes:
Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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R for knee brace

Hello, all

I have small canopy project, 40' x 16' x 10' high having 4 steel columns at corner.  OMRF(Ordinary Moment Resisting Frame) with R = 3.5 used at trasverse direction and I will have L shape knee braces at longitudinal direction. But I have no idea what R value is suitable for this knee bracing.
Please give me some idea.
Thanks in advance.

LA, CA

******* ****** ******* ******** ******* ******* ******* ***
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*
* 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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RE: IBC Loads for Guard Rail

Assuming you mean guard rails for people, opposed to vehicular.

IBC 2003, section 1607.7.1, paraphrased:

50PLF at top, in any direction, except 1&2 family dwellings and modified to 20 PLF in certain occupancies in areas not accessible to public

1607.7.1.1
200 lbs concentrated load at top in any direction, not simultaneous with other load.

1607.7.1.2
50 lbs over 1 square foot of fillers, not simultaneous with other load.

1607.7.1.3
30% allowable stress increase for ASD

Aaron

-----Original Message-----
From: Gary L. Hodgson and Assoc. [mailto:design@hodgsoneng.ca]
Sent: Friday, October 23, 2009 5:51 AM
To: SEAINT Mail List
Subject: IBC Loads for Guard Rail

List,

I wonder if anybody can help me. I have a customer who makes composite
plastic and wood guard rails. He's had them evaluated in the US at ICC
Evaluation Services Inc. and the issued report makes reference to the
IBC. However, we don't use the IBC up here in Canada.

Can anybody tell me what the loads and clause numbers are in the IBC for
guard rails for houses or small buildings?

thanks,
Gary

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RE: Engineering Software Quest

Hello Mr. "Thank you"
The geotech engineer should tell you in their report what the allowable lateral load is for different depths since the flagpole equation is not applicable for large depths or non uniform soils.  The software that they use should be interpreted by someone who is an expert in the geotechnical field.
 
Richard Hess, S.E.
-----Original Message-----
From: office@cwhowe.com [mailto:office@cwhowe.com]
Sent: Friday, October 23, 2009 11:10 AM
To: seaint@seaint.org
Subject: Engineering Software Quest

Hello,
Is anyone familiar with an engineering program that aids in the design of piles subjected to lateral loads embedded in two different types of  substrates?  I have a retaining wall on a hill side supported on piles and grade beams.  The site is covered with a layer of fill.  Bellow the fill is a layer of marine terrace and bellow the marine terrace is bedrock.  Both the marine terrace and bedrock are suitable to provide lateral support for the piles (based on the recommendation of the soils engineer).  Using the "flag pole embedment" equation commonly used to design piles subjected to lateral loads, the required depth of embedment for the pile is deeper than the layer of marine terrace, that being the case, it seems advantages to consider both materials in resisting the lateral loads the pile is subjected to (Because of the depth of the marine terrace, it doesn't make a whole lot of sense to ignore it).  However, the "flag pole" equation does not lend itself directly to situations when two different types of materials are considered.

Thank you


RE: Site Visits & OSHA Training

Check this out:
http://www.osha.gov/dte/outreach/construction_generalindustry/index.html
They have references to where you can get the training.  Some offer on-line training. 
 
This is linked from OSHA to find trainers:
http://outreachtrainers.org/client/trainer_results.aspx
 
After years of wandering around construction sites and climbing steel with no hard hat, no safety belt, no boots, no clue, but lots of luck.... I would suggest that you get the training.  Also know what is confined entry and what to do about that.  We had a guy killed by CO2 a few years back in a confined entry. 
 
Get the training and the PPE you will need.  They will teach you what PPE is in the class.  You will also learn how to develop a JHA and many other things that will keep you and your colleagues safe. 

Regards, Harold Sprague


 

From: seaint05@lewisengineering.com
To: seaint@seaint.org
Subject: Site Visits & OSHA Training
Date: Thu, 22 Oct 2009 21:32:20 -0500

My post on TOWERS provide some very helpful insight.  I appreciate all of the responses.

 

Harold's response got me doing research on OSHA and wondering, aside from my specific question about Towers, what OSHA training should I have just to visit jobsites for field observation visits.  Harold said they don't send anyone out in the field without the 10 hours class.  I've been looking at the OSHA website and can't find anything specific that addresses our profession.  My memory of a discussion of this years ago is engineers making site visits would not have to have OSHA training.  Is that a valid assumption today, or am I open to a citation should I happen to visit the jobsite on a wrong day?  I know when I visit mines I have to take a short MSHA course before they let me on the property.  Sometimes contractors make me take a short safety course on certain jobs before I can walk the site.

 

I would appreciate any references to specific OSHA requirements.

 

Rich

 



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Re: Engineering Software Quest

try
 
they have L-pile and more
Dave A
----- Original Message -----
Sent: Friday, October 23, 2009 11:10 AM
Subject: Engineering Software Quest

Hello,
Is anyone familiar with an engineering program that aids in the design of piles subjected to lateral loads embedded in two different types of  substrates?  I have a retaining wall on a hill side supported on piles and grade beams.  The site is covered with a layer of fill.  Bellow the fill is a layer of marine terrace and bellow the marine terrace is bedrock.  Both the marine terrace and bedrock are suitable to provide lateral support for the piles (based on the recommendation of the soils engineer).  Using the "flag pole embedment" equation commonly used to design piles subjected to lateral loads, the required depth of embedment for the pile is deeper than the layer of marine terrace, that being the case, it seems advantages to consider both materials in resisting the lateral loads the pile is subjected to (Because of the depth of the marine terrace, it doesn't make a whole lot of sense to ignore it).  However, the "flag pole" equation does not lend itself directly to situations when two different types of materials are considered.

Thank you


Engineering Software Quest

Hello,
Is anyone familiar with an engineering program that aids in the design of piles subjected to lateral loads embedded in two different types of  substrates?  I have a retaining wall on a hill side supported on piles and grade beams.  The site is covered with a layer of fill.  Bellow the fill is a layer of marine terrace and bellow the marine terrace is bedrock.  Both the marine terrace and bedrock are suitable to provide lateral support for the piles (based on the recommendation of the soils engineer).  Using the "flag pole embedment" equation commonly used to design piles subjected to lateral loads, the required depth of embedment for the pile is deeper than the layer of marine terrace, that being the case, it seems advantages to consider both materials in resisting the lateral loads the pile is subjected to (Because of the depth of the marine terrace, it doesn't make a whole lot of sense to ignore it).  However, the "flag pole" equation does not lend itself directly to situations when two different types of materials are considered.

Thank you


RE: IBC Loads for Guard Rail

Overall, it is section 1607.7 of the 2006 IBC (should be same or rather
close for other versions).

The loads basically are 50 plf applied in any direction at the top of the
handrail/guardrail or 200 lb concentrated load applied any direction at the
top of the handrail/guardrail. There is an exception for one- and
two-family dwelling that only requires the concentrated load, but not the
uniform load. In addition, any intermediate rails need to take 50 lbs on an
area equal to 1 sq ft.

HTH,

Regards,

Scott
Adrian, MI

-----Original Message-----
From: Gary L. Hodgson and Assoc. [mailto:design@hodgsoneng.ca]
Sent: Friday, October 23, 2009 11:51 AM
To: SEAINT Mail List
Subject: IBC Loads for Guard Rail

List,

I wonder if anybody can help me. I have a customer who makes composite
plastic and wood guard rails. He's had them evaluated in the US at ICC
Evaluation Services Inc. and the issued report makes reference to the IBC.
However, we don't use the IBC up here in Canada.

Can anybody tell me what the loads and clause numbers are in the IBC for
guard rails for houses or small buildings?

thanks,
Gary

******* ****** ******* ******** ******* ******* ******* ***
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Re: what is the allowable beam opening?

True, but the design guide will help him understand the principles

-gm

On Thu, Oct 22, 2009 at 11:50 PM, Scott Maxwell <smaxwell@umich.edu> wrote:
The question was about a concrete beam, not steel.

Regards,

Scott
Adrian, MI



On 10/22/09 7:33 PM, "Gerard Madden, SE" <gmse4603@gmail.com> wrote:

Get AISC design Guide #2

-gm

On Thu, Oct 22, 2009 at 3:22 PM, Conrad Harrison <sch.tectonic@bigpond.com> wrote:
From memory the middle third of the beam depth. But otherwise design the beam for the hole.
 

Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide

South Australia


From: Noy Tiglao [mailto:hou69noy@yahoo.com]
Sent: Friday, 23 October 2009 05:14
To: seaint@seaint.org
Subject: what is the allowable beam opening?

 

what is the allowable beam opening for MEP utilities to pass or penetrate through concrete beam? is there any probition in the code that allows opening or holes in beam? thank you.
 



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IBC Loads for Guard Rail

List,

I wonder if anybody can help me. I have a customer who makes composite
plastic and wood guard rails. He's had them evaluated in the US at ICC
Evaluation Services Inc. and the issued report makes reference to the
IBC. However, we don't use the IBC up here in Canada.

Can anybody tell me what the loads and clause numbers are in the IBC for
guard rails for houses or small buildings?

thanks,
Gary

******* ****** ******* ******** ******* ******* ******* ***
* 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
*
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Re: Antenna Tower Inspection

I am that age. I have heard quite a few "war" stories, some funny some
interesting, but never heard any of the bad incidents because they never
wanted to talk about those.
Gary

Christopher Wright wrote:
>
> On Oct 22, 2009, at 6:49 AM, Gary L. Hodgson and Assoc. wrote:
>
>> Reminds me of when I was in the air force and stationed up north at a
>> radar base near a local airport. This one pilot always flew with
>> extra seat protection to keep the family heirlooms safe from the damn
>> radars. I flew with him twice and he was serious.
> Depending on how old you are, you might've run into WWII pilots who
> sat on their flak jackets rather than wearing them for the same
> reason. For their sake I hope it worked, but I doubt it.
>
> 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/members/chrisw/
>
>
>
>
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Re: what is the allowable beam opening?

        If you can find a copy, the PCI Journal had an article in the Nov-Dec 1977 issue on beams with large openings. However, they were prestressed and they take advantage of moment capacity below the hole (and N.A.) that Scott mentions is not useful in reinforced beams.
        HTH,
        Jim Getaz
 

Thursday, October 22, 2009

Re: what is the allowable beam opening?

The question was about a concrete beam, not steel.

Regards,

Scott
Adrian, MI


On 10/22/09 7:33 PM, "Gerard Madden, SE" <gmse4603@gmail.com> wrote:

Get AISC design Guide #2

-gm

On Thu, Oct 22, 2009 at 3:22 PM, Conrad Harrison <sch.tectonic@bigpond.com> wrote:
From memory the middle third of the beam depth. But otherwise design the beam for the hole.
 

Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide

South Australia


From: Noy Tiglao [mailto:hou69noy@yahoo.com]
Sent: Friday, 23 October 2009 05:14
To: seaint@seaint.org
Subject: what is the allowable beam opening?

 

what is the allowable beam opening for MEP utilities to pass or penetrate through concrete beam? is there any probition in the code that allows opening or holes in beam? thank you.
 



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Site Visits & OSHA Training

My post on TOWERS provide some very helpful insight.  I appreciate all of the responses.

 

Harold’s response got me doing research on OSHA and wondering, aside from my specific question about Towers, what OSHA training should I have just to visit jobsites for field observation visits.  Harold said they don’t send anyone out in the field without the 10 hours class.  I’ve been looking at the OSHA website and can’t find anything specific that addresses our profession.  My memory of a discussion of this years ago is engineers making site visits would not have to have OSHA training.  Is that a valid assumption today, or am I open to a citation should I happen to visit the jobsite on a wrong day?  I know when I visit mines I have to take a short MSHA course before they let me on the property.  Sometimes contractors make me take a short safety course on certain jobs before I can walk the site.

 

I would appreciate any references to specific OSHA requirements.

 

Rich

 

Re: what is the allowable beam opening?

I do not recall anything one way or the other in ACI 318, but my memory is not what it used to be.  :)

In general, I would just make sure you understand how the code provisions work and put that to use.  For example, ACI makes use of Whitney’s stress block.  Thus, in theory, as long as your hole is the distance “c” below the top of the beam (i.e. Below the neutral axis) and leaves enough room for the flexural bars to be developed in the bottom and the hole does not interfere with the shear stress transfer from the top of the beam to the bottom of the beam, then it should be OK.  From a flexural point of view, the concrete below the neutral axis does not “exist” for flexural strength calcs.  Of course, it is VERY important for shear stresses.

Not sure if that helps or not.

Regards,

Scott
Adrian, MI

On 10/22/09 6:22 PM, "Conrad Harrison" <sch.tectonic@bigpond.com> wrote:

From memory the middle third of the beam depth. But otherwise design the beam for the hole.
 

Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide

South Australia


From: Noy Tiglao [mailto:hou69noy@yahoo.com]
Sent: Friday, 23 October 2009 05:14
To: seaint@seaint.org
Subject: what is the allowable beam opening?


what is the allowable beam opening for MEP utilities to pass or penetrate through concrete beam? is there any probition in the code that allows opening or holes in beam? thank you.



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It's easy to create your personal chat space on your blogs


Re: what is the allowable beam opening?

Get AISC design Guide #2

-gm

On Thu, Oct 22, 2009 at 3:22 PM, Conrad Harrison <sch.tectonic@bigpond.com> wrote:

From memory the middle third of the beam depth. But otherwise design the beam for the hole.

 

Regards

Conrad Harrison

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

mailto:sch.tectonic@bigpond.com

Adelaide

South Australia


From: Noy Tiglao [mailto:hou69noy@yahoo.com]
Sent: Friday, 23 October 2009 05:14
To: seaint@seaint.org
Subject: what is the allowable beam opening?

 

what is the allowable beam opening for MEP utilities to pass or penetrate through concrete beam? is there any probition in the code that allows opening or holes in beam? thank you.

 


Start chatting with friends on the all-new Yahoo! Pingbox today!!
It's easy to create your personal chat space on your blogs


Re: Antenna Tower Inspection

I used to work for a tower company, and we had field guys who takes
measurement, photos, and other things
necessary to do a structural analysis. The field guys are properly
equipped, and had the experience in climbing towers.
If you have concerns about safety then you should consider hiring
tower guys to do the data gathering for your project.


Rainier C. Catubig
CA Structural Engineer
Via iPhone


On Oct 21, 2009, at 2:09 PM, seaint05@lewisengineering.com wrote:

> I've been asked to put a price together for performing a structural
> evaluation of a three legged tower, 40 feet tall. I will probably
> have to
> climb the tower to take some field measurements. Right now I don't
> know
> what equipment is attached to the tower, probably cell or radio
> antennas.
> I'm wondering if someone who may have climbed these things in the past
> could guide me to the appropriate guidelines for safety equipment
> and any
> regulations for potential climbers of steel framed towers. I know
> it is a
> risky endeavor. There is potential for electrocution, etc., among
> other
> dangers.
>
> I would appreciate any insight you all can give.
>
> Rich
>
>
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RE: what is the allowable beam opening?

From memory the middle third of the beam depth. But otherwise design the beam for the hole.

 

Regards

Conrad Harrison

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

mailto:sch.tectonic@bigpond.com

Adelaide

South Australia


From: Noy Tiglao [mailto:hou69noy@yahoo.com]
Sent: Friday, 23 October 2009 05:14
To: seaint@seaint.org
Subject: what is the allowable beam opening?

 

what is the allowable beam opening for MEP utilities to pass or penetrate through concrete beam? is there any probition in the code that allows opening or holes in beam? thank you.

 


Start chatting with friends on the all-new Yahoo! Pingbox today!!
It's easy to create your personal chat space on your blogs