Structural Engineering: RE: Lag Bolts in Sht. Metal Straps

Thanks for everyone's input on this subject. I've decided to go with
Simpson's CS16 strap and SDS screws. I am using the NDS values for 0.19"
wood screw in 16 ga. metal. I know that you need at least 14 ga. for 0.25"
screw values, but I don't see why this isn't valid, (using 0.19" vaules for
a 0.25" screw). I'll use a washer behind the SDS head. This is a California
OSHPD job, so I am sure the clacs will be scrutinized very carefully.

Thanks again

>From: "Marlou Rodriguez" <mbrodrig@mbrodriguez.com>
>Reply-To: <seaint@seaint.org>
>To: <seaint@seaint.org>
>Subject: RE: Lag Bolts in Sht. Metal Straps
>Date: Fri, 7 Sep 2007 18:17:19 -0700
>
>I agree, SDS screws would be the best but you will need to use a strap that
>is at least 14 ga minimum. I do not believe simpson has any values for
>anything less than 14 ga.
>
>Marlou Rodriguez, S.E.
>MBRodriguez Engineering Inc.
>2355 Oakland Road, Suite 14
>San Jose, CA 95131
>Tel: (408) 432-4866
>Cel: (408) 761-5013
>
>
>-----Original Message-----
>From: Christopher Banbury [mailto:cbanbury@arkengineering.net]
>Sent: Friday, September 07, 2007 5:23 PM
>To: seaint@seaint.org
>Subject: RE: Lag Bolts in Sht. Metal Straps
>
>I second the earlier suggestion to use Simpson SDS screws. If you don't
>need anything over a 1/4" diameter then I believe you will find that these
>will give you higher allowable shear loads than you can calc from the NDS
>for any lag screw. In addition they are self drilling and have excellent
>tabulated pullout resistance.
>
>Christopher Banbury, PE
>President
>
>Ark Engineering, Inc.
>PO Box 10129, Brooksville, FL 34603
>22 North Broad ST, Brooksville, FL 34601
>Phone: (352) 754-2424
>Fax: (352) 754-2412
>www.arkengineering.net
>
>
>-----Original Message-----
>From: Marlou Rodriguez [mailto:mbrodrig@mbrodriguez.com]
>Sent: Friday, September 07, 2007 8:16 PM
>To: seaint@seaint.org
>Subject: RE: Lag Bolts in Sht. Metal Straps
>
>If you are going to attach your strap, use wood screws. For a 16 ga strap
>you can use up to a #10 wood screw. You can find single shear capacities
>from 2005 NDS table 11m.
>
>Good luck
>
>Marlou Rodriguez, S.E.
>MBRodriguez Engineering Inc.
>2355 Oakland Road, Suite 14
>San Jose, CA 95131
>Tel: (408) 432-4866
>Cel: (408) 761-5013
>
>
>-----Original Message-----
>From: Larry Hauer [mailto:lrhauer@hotmail.com]
>Sent: Friday, September 07, 2007 1:30 PM
>To: seaint@seaint.org
>Subject: RE: Lag Bolts in Sht. Metal Straps
>
>Marlou,
>
>Thanks for that info. re. being able to wrap a 16 ga. strap around the tank
>perimeter- that is what I will use.
>
>Larry Hauer
>
>
> >From: "Marlou Rodriguez" <mbrodrig@mbrodriguez.com>
> >Reply-To: <seaint@seaint.org>
> >To: <seaint@seaint.org>
> >Subject: RE: Lag Bolts in Sht. Metal Straps
> >Date: Fri, 7 Sep 2007 09:12:34 -0700
> >
> >I have used 16 ga straps to wrap around tanks in the past. The key is to
> >make sure that the effective section at your connections can resist your
> >tensile load. Use wider straps if necessary. Depending on your load I
> >would not use anything less than 18 ga.
> >
> >Marlou Rodriguez, S.E.
> >MBRodriguez Engineering Inc.
> >2355 Oakland Road, Suite 14
> >San Jose, CA 95131
> >Tel: (408) 432-4866
> >Cel: (408) 761-5013
> >
> >-----Original Message-----
> >From: Larry Hauer [mailto:lrhauer@hotmail.com]
> >Sent: Friday, September 07, 2007 7:09 AM
> >To: seaint@seaint.org
> >Subject: Re: Lag Bolts in Sht. Metal Straps
> >
> >I'd love to use a thicker strap, but the straps have to be flexible to
>wrap
> >around small diamter tanks. Did you know that those seismic straps around
> >hot water heaters are only 26 gage, (0.018" thick)!!
> >
> >Larry Hauer
> >
> >
> > >From: "Robert Kazanjy" <rkazanjy@gmail.com>
> > >Reply-To: <seaint@seaint.org>
> > >To: seaint@seaint.org
> > >Subject: Re: Lag Bolts in Sht. Metal Straps
> > >Date: Thu, 6 Sep 2007 21:38:14 -0700
> > >
> > >14 gage is ~.075" thick, a much more reasonable thickness
> > >
> > >cheers
> > >Bob
> > >
> > >On 9/6/07, Josh Comfort <jcomfort@ggbse.com> wrote:
> > > >
> > > > Table 11K in the 2005 NDS has single shear values for 3/8" diam. lag
> > > > screws
> > > > w/ 14 ga. side member thickness: G=0.5, Z(par)=200#, Z(perp)=130#.
> > >Those
> > > > values are for a penetration (p) of 8D into the wood. For 4D< p<
>8D,
> > >you
> > > > multiply the values by p/8D.
> > > >
> > > > -----Original Message-----
> > > > From: Larry Hauer [mailto:lrhauer@hotmail.com]
> > > > Sent: Thursday, September 06, 2007 1:32 PM
> > > > To: seaint@seaint.org
> > > > Subject: Lag Bolts in Sht. Metal Straps
> > > >
> > > >
> > > > I'm working on the anchorage of equipment to existing wood stud
>walls
> > >and
> > > > need to know what the minimum thickness of sheet metal strapping is
> >for
> > > > both
> > > > a 3/8" diam. and 1/2" diam. lag bolt acting in shear and what those
> > >shear
> > > > values are. I understand the values ares in some light gauge metal
> > > > handbook
> > > > which I do not have. I would like the thickness to be the minimum
> > > > possible,
> > > > (24 ga.?), and still get an allowable shear value of about 400#.
> > > >
> > > > Thanks in advance.
> > > >
> > > > Larry Hauer S.E.
> > > >
> > > > _________________________________________________________________
> > > > Get a FREE small business Web site and more from Microsoft(r) Office
> > >Live!
> > > > http://clk.atdmt.com/MRT/go/aub0930003811mrt/direct/01/
> > > >
> > > >
> > > > ******* ****** ******* ******** ******* ******* ******* ***
> > > > * 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
> > > > ******* ****** ****** ****** ******* ****** ****** ********
> > > >
> > > >
> > > >
> > > > ******* ****** ******* ******** ******* ******* ******* ***
> > > > * 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
> > > > ******* ****** ****** ****** ******* ****** ****** ********
> > > >
> >
> >_________________________________________________________________
> >Discover sweet stuff waiting for you at the Messenger Cafe. Claim your
> >treat today!
> >http://www.cafemessenger.com/info/info_sweetstuff.html?ocid=TXT_TAGHM_SeptHMtagline2
> >
> >
> >******* ****** ******* ******** ******* ******* ******* ***
> >* 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
> >******* ****** ****** ****** ******* ****** ****** ********
> >
> >******* ****** ******* ******** ******* ******* ******* ***
> >* 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
> >******* ****** ****** ****** ******* ****** ****** ********
>
>_________________________________________________________________
>Get a FREE small business Web site and more from Microsoft® Office Live!
>http://clk.atdmt.com/MRT/go/aub0930003811mrt/direct/01/
>
>
>******* ****** ******* ******** ******* ******* ******* ***
>* 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
>******* ****** ****** ****** ******* ****** ****** ********
>
>******* ****** ******* ******** ******* ******* ******* ***
>* 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
>******* ****** ****** ****** ******* ****** ****** ********
>
>
>
>******* ****** ******* ******** ******* ******* ******* ***
>* 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:
>*
>*

_________________________________________________________________
Can you find the hidden words? Take a break and play Seekadoo!

http://club.live.com/seekadoo.aspx?icid=seek_hotmailtextlink1

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

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

Saturday, September 8, 2007

RE: Lag Bolts in Sht. Metal Straps