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- To: wai(--nospam--at)euken.com
- Subject: Fwd: Re: connection between double angles
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 07 Aug 1997 12:35:30 GMT
>---------- >From: JOHN HUBERT[SMTP:John.Hubert(--nospam--at)NCB01.usace.army.mil] >Sent: Friday, April 18, 1997 5:33 PM >To: seaoc(--nospam--at)seaoc.org >Subject: connection between double angles > > > > Does anybody know what type of weld would be used to connect > back-to-back double angles to be used as a compression member? It > doesn't seem like a fillet weld would be applicable because there is > no corner. Also, section E4 (Built-Up Members) of the ASD Manual > states that intermittent welds in built-up members shall be adequate > to provide for the transfer of calculated stress. Does this mean that > the sum of the intermittent weld strengths must be able to resist the > design axial load applied along the longitudinal axis of the member? > > Thanks in advance for your response, > > John Hubert, P.E. > > John : I think you have your questions on double angles as a compression member answered . But here is an approach that I would do : Considering the Double angles as a beam and simply-supported at both ends. Apply a concentrated load P at the mid span in out of plane direction. Increase the P until the combined section reach it plastic moment Mp. Now, you find shear in the member due to this plastic moment. Design the welds required by the shear ( like any horizontal shear in beam). Normally, we put shim plates( or spacer plates) between the angles and provide fillet welds. With this approach, the member will be good as compression member as well as beam member for out of plane loads. The basic idea is to decrease the KL / r and increase compression capacity without buckling. Hope this approach will provide you some idea. >Kenneth Liu, SE --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [126.96.36.199]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id KAA24282 for <rlewis(--nospam--at)techteam.org>; Tue, 22 Apr 1997 10:08:29 -0500 (CDT) Received: from mail5.pilot.net by server1.seaoc.org (NTList 3.02.13) id ka019354; Tue, 22 Apr 1997 08:01:09 -0700 Received: from nycm6.pbworld.com (nycm6.pbworld.com [188.8.131.52]) by mail-ewr-1.pilot.net with SMTP id KAA19104 for <seaoc(--nospam--at)seaoc.org>; Tue, 22 Apr 1997 10:58:47 -0400 (EDT) Received: by nycm6.pbworld.com with SMTP (Microsoft Exchange Server Internet Mail Connector Version 4.0.994.63) id <01BC4F0B.EE5F7880(--nospam--at)nycm6.pbworld.com>; Tue, 22 Apr 1997 10:57:12 -0400 Message-ID: <c=US%a=_%p=PB%l=PB/NYIMC/000CC40C(--nospam--at)nycm6.pbworld.com> From: <liuk(--nospam--at)pbworld.com> To: <seaoc(--nospam--at)seaoc.org> Subject: RE: connection between double angles Date: Tue, 22 Apr 1997 10:57:08 -0400 X-Mailer: Microsoft Exchange Server Internet Mail Connector Version 4.0.994.63 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Reply-To: seaoc(--nospam--at)seaoc.org Error-To: seaoc-ad(--nospam--at)seaoc.org X-Loop: seaoc(--nospam--at)seaoc.org X-Info: [SEAOC] Owner: seaoc-ad(--nospam--at)seaoc.org X-POP3-Rcpt: seaoc-ad(--nospam--at)seaoc.org X-Sender: seaoc-ad(--nospam--at)seaoc.org Precedence: list X-ListMember: rlewis(--nospam--at)techteam.org [seaoc(--nospam--at)seaoc.org] __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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