Need a book? Engineering books recommendations...
Fwd: Re: Notch Bottom of GLB[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: wai(--nospam--at)euken.com
- Subject: Fwd: Re: Notch Bottom of GLB
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 06 Aug 1997 13:54:30 GMT
Re: Sasha Itsekson asked about notching the bottom of a GLB. Absolutely NOT!!! There are many more things to worry about than the bending stress. Remember, that when you notch the bottom of a GLB, you are subjecting the laminations to *TENSION* perpendicular to the lamination. This will result in delamination/splitting of the GLB starting at the re-entrant corner of the notch. I investigated the failure of a GLB that had a 2-inch by 2-foot notch put in it so that a flourescent light fixture in a suspended ceiling would fit without lowering the suspended ceiling. (The contractor "repaired" the beam by putting another GLB on the roof and running rods thru the roof to support the framing on one side of the failed GLB. Needless to say, the contractor didn't do anything to protect the roof mounted GLB from the weather, either.) The only way that I would permit a notch in the bottom of any wood beam would be to have mechanical connections (bolts) thru the beam before and after the notch and some members to carry the force across the notch. A. Roger Turk, P.E.(S) Tucson, Arizona --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [18.104.22.168]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id PAA29319 for <rlewis(--nospam--at)techteam.org>; Fri, 4 Apr 1997 15:48:32 -0600 (CST) Received: from arl-img-2.compuserve.com by server1.seaoc.org (NTList 3.02.10) id ka016494; Fri, 4 Apr 1997 13:34:59 -0800 Received: by arl-img-2.compuserve.com (8.6.10/5.950515) id QAA03011; Fri, 4 Apr 1997 16:32:45 -0500 Date: 04 Apr 97 16:31:49 EST From: Roger Turk <73527.1356(--nospam--at)CompuServe.COM> To: SEAOC <seaoc(--nospam--at)seaoc.org> Subject: Re: Notch Bottom of GLB Message-ID: <970404213148_73527.1356_CHK45-1(--nospam--at)CompuServe.COM> 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.
- Prev by Subject: NISA / DISPLAY
- Next by Subject: Fwd: Notch in GLB
- Previous by thread: Fwd: Notch in GLB
- Next by thread: Fwd: Humour-Engineer vs Lawyer