Aci 318 08

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For a listing of and access to all product errata, visit the Errata page. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Wight can be reached at jwight umich. There is a lot of information available about mass concrete structure, but I think most engineers start to be concerned when the thickness of a concrete slab exceeds about a metre. And, why is that behavior unique for slabs?

To alleviate some confusion regarding this reinforcement, the code now defines two types of reinforcement that can be used across a potential breakout cone. Uh, sounds like you saying that anyone who thinks there is ambiguity here is an incommpetennt idiot? With over years of production history, the automotive industry has been at the forefront of manufacturing technology since its inception. Please choose a product format. The minimum quantities are tensile reinforcement requirements.

CRSI Lap Splices

So all of these are very clear. Josh, Not sure that I have time at the moment to address your question, but I certainly was not implying that flexural steel always controls. What an amazing resource this website is.

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These items are not eligible for return. Hokie - That thread doesn't look quite right to me. Pad footings in general don't really need restraint shrinkage reinforcement due to their size. The sections in question are quite clear to me. Download Now With over years of production history, the automotive industry has been at the forefront of manufacturing technology since its inception.

Under in-plane shear, inclined cracks can propagate into segments of the wall directly above and below the wall pier. Does anyone disagree with that interpretation? The use of headed deformed bars should be a viable alternative to hooked-bar anchorages in regions where reinforcement is heavily congested.

Attached is a copy from MacGregor and Wight book addressing this issue. Available data were judged to be insufficient to permit such usage. That coincides with my interpretation, but I don't agree that it is conservative, just that it is correct, and actually quite simple. For columns in special moment frames, the accumulation of provisions over many code cycles had resulted in a tangled series of provisions that were difficult to follow.

Even if you don't come to the same conclusion as everyone else. Lap splices of bundled bars should be based on the lap splice length recommended for individual bars of the same size, and individual splices within the bundle should not overlap each other.

Demystifying ACI 318 Appendix DACI 318-08 Section 10.5.4 interpretationRelated Products

The requirements defining when to use diagonally reinforced or conventionally reinforced coupling beams were also clarified. To correct these deficiencies, without substantially changing the test load intensity, the required test load intensity was revised to be not less than the largest of three load combinations.

Questions about this article, topic, or product? This expansion is based on the results of new tests using larger diameter anchors. And, I'm willing to concede that it may be the best interpretation based on the legal language of the code. Bar laps should be securely wire-tied together to maintain the alignment of the bars and to provide minimum concrete cover.

The point of maximum compression within the section cut for the selected load combination is denoted with a black dot. Also, magic the gathering duels of the planeswalkers the type of transverse reinforcement used to enclose structural integrity reinforcement in perimeter beams was more clearly specified. Those requirements have been rewritten in a more logical sequence.

Highways, Streets, Bridges. But, that's based on the As wording currently in the code. However, I need to understand the theory behind the code requirement. Also includes expanded information on headed bars.

Join your peers on the Internet's largest technical engineering professional community. In my thinking slab foundations have a good bit more load re-distribution ability than other flexural members. Mat slabs and combined footings are another story. The code never says that to my knowledge. Click Here to join Eng-Tips and talk with other members!

JoshPlum, I am glad that I'm not the only one confused. Choose Product Language English. The length of the lap varies depend on concrete strength, the rebar grade, size, and spacing.

Clarifying code changes Identifying updates to ACI 318-08

How has anchor testing and evaluation been affected? The Eng-Tips staff will check this out and take appropriate action. All the more reason for the two requirements to be separated. Are you an Engineering professional?