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- Subject: Fwd: Re: Monlithic or Two Pour Slab on Grade
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 30 Jul 1997 14:53:11 GMT
Here in Simi Valley in 1994 (Northridge EQ), many homes actually separated at the cold joint and the slab slid off the footings. Repair costs were of course very high. In Canyon Country and areas of San Fernando Valley, many foundation anchor bolts failed by breaking out the edge of the concrete slab. Most of these appeared to have also been two-pour slabs-on-grade, with a cold joint. Again high repair costs. My recommendation is either to insist on monolithic, or provide both edge dowels, bent into the slab and a continuous bar at the edges, tied to the dowels. These will provide some confinement for the AB's. Assume a cold joint separation and design dowels and anchors accordingly. For highly loaded anchor bolts, consider a "hairpin bar" around each AB. Russ Nester rnester(--nospam--at)juno.com _________________________________________________________ On Wed, 5 Mar 1997 08:59:06 -0800 "Dennis S. Wish PE" <wish(--nospam--at)cyberg8t.com> writes: >I need some quick advise on this topic. I designed a custom home with >a >monolithically poured slab on grade. The contractor wants to do the >slab as >a two pour because he feels that it is easier to set and locate his >holddowns and anchor bolts. >I remember some posts regarding problems with two pour slabs and the >potential for sliding during heavy seismic activity. >Is a two pour slab still considered a viable construction method. The >structure is a one story custom home in the Palm Springs area. >Sincerely >Dennis Wish PE > >PS: I understand about the necessity to assure that my anchor bolts >and >holddowns are properly embedded into the continuous footing of the >slab. --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [184.108.40.206]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id VAA12537 for <rlewis(--nospam--at)techteam.org>; Thu, 6 Mar 1997 21:37:56 -0600 (CST) Received: from x4.boston.juno.com by server1.seaoc.org (NTList 3.02.10) id va005897; Thu, 6 Mar 1997 19:23:05 -0800 Received: (from rnester(--nospam--at)juno.com) by x4.boston.juno.com (queuemail) id VuS08006; Thu, 06 Mar 1997 21:59:39 EST To: seaoc(--nospam--at)seaoc.org Date: Thu, 6 Mar 1997 00:28:59 PST Subject: Re: Monlithic or Two Pour Slab on Grade Message-ID: <19970306.185620.10199.1.rnester(--nospam--at)juno.com> References: <199703051702.JAA24534(--nospam--at)key.cyberg8t.com> X-Mailer: Juno 1.00 X-Juno-Line-Breaks: 10-14,16-33 From: rnester(--nospam--at)juno.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.
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