Need a book? Engineering books recommendations...
[SEAOC] Re: [SEAOC] Welded Rebar advise needed[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)power.net
- Subject: [SEAOC] Re: [SEAOC] Welded Rebar advise needed
- From: "James M. Warne" <jwarne(--nospam--at)direct.ca>
- Date: Mon, 30 Sep 1996 21:30:59 -0700
At 05:13 PM 9/30/96 -0700, you wrote: >I want to resist uplift ( with 7/8" diameter threaded rods welded to #6 rebar >(jamb bars) embedded into the footing. Did you know that rebar welding is often unreliable, unless special procedures are followed, or unless "weldable rebar" is used? It's not common in the field. The problem is the high carbon content which leaves everything very brittle, and the start of the weld is a stress raiser. If the wall isn't built yet, try an ordinary lapped splice. You can put nuts and washers on the threaded rod to get anchorage equivalent to the deformed rebar. If you're stuck with existing rebar and the projection isn't enough to develop the tension, you may be able to bend it into a hook, or thread the rebar for a coupling splice. I guess you CAN weld if you have to, but you'll need a good welder with good equipment, and special supervision. There are probably better alternatives, such as drilling in some anchors somewhere, instead. The base plate should bear on concrete, but it sounds like you'll be grouting the masonry, so it could still be on concrete at masonry level. You'll probably want some flowable grout under the base plate. Putting the base plate on top means the bolts have to stick out and might be in somebody's way. I hope I understood the situation. I gather the "header" is like a lintel. "CMU" is a TLA* I haven't heard in Vancouver - perhaps Concrete Masonry Units? *"Three Letter Acronym" Jim Warne ...
- Prev by Subject: [SEAOC] Re: [SEAOC] welded matched box connections in bridge
- Next by Subject: [SEAOC] RE: [SEAOC] Welded Rebar advise needed
- Previous by thread: [SEAOC] Welded Rebar advise needed
- Next by thread: [SEAOC] RE: [SEAOC] Welded Rebar advise needed