ACI 318-99 PDF

Abstract: Note: A newer version of this document exists. The code portion of this documents covers the proper design and construction of buildings of structural concrete. The code has been written in such form that it may be adopted by reference in a general building code and earlier editions have been widely used in this manner. The quality and testing of materials used in construction are covered by reference to the appropriate ASTM standard specifications. Because the ACI Building Code is written as a legal document so that it may be adopted by reference in a general building code, it cannot present background details or suggestions for carrying out its requirements or itent.

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All of the members of the committee understood that we would publish an interim code in and a major new one in Little did we know what the future held. How we got there is the basis of this memo. Practicing structural engineers in the United States understand that ACI does not become a legal code until it is incorporated into a model building code, which is normally then adopted by a local jurisdiction as its building code.

In recent history, there have been three recognized model building code agencies in the United States. Each is used in different geographical areas of the U. Shortly after our committee started work in , the three model code groups came together and formed a new body, known as the International Code Council ICC.

This new group made a decision to publish a single model building code by the year , to be known as the International Building Code or IBC Where previously the ACI document was used by the three model code groups, it will now be used by only one in the IBC In the preparation of IBC , several things became apparent.

Second, the plus differences that had existed in UBC would be carried forward to IBC as plus modifications to We on Committee undertook the task of minimizing those differences between IBC and the new version of ACI that would be referenced. For this, we still have another hearing to go through in March but, assuming the version of ACI is accepted to be the referenced document for the design of concrete structures, the number of modifications will be close to ten instead of the 60 plus which existed in UBC.

The proposed revisions to to be incorporated in are included at the end of this issue of Concrete International. All of you have the right to comment on these proposed revisions until February 1, Many of these suggested changes are the result of our desire to address the modifications or differences that existed between and UBC. In the future we will endeavor to produce a code that will always precede the IBC code by a year.

Since it is the intention of ICC to publish a building code every three years starting in the year , ACI will attempt to publish in , , , and so on. Consequently, our next code edition will be and every three years after that. This will demand a change in our approach to revisions since we have been publishing a new code every six years since These are exciting times that require a change in our organizational approach as well as our publishing schedule.

The ACI Committee looks forward to the challenge and with your help will do our best for the Institute. Remember, the version of ACI that is incorporated by reference in IBC is the legally adopted code that will be used by most municipalities as their building code.

Cagley, President,.


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Pro Help D. Pro data file. Refer to D. Suitable Member Properties for more details. Beams are designed for flexure, shear and torsion. Each member is divided into equally spaced sections along its length and the design is performed at each of these locations.


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1. ACI 318 99


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