The Reorganized ACI 14 Code. – Are You Ready? Neal S. Anderson, P.E., S.E.. Staff Consultant. Simpson Gumpertz & Heger, Chicago, Illinois. The American Concrete Institute (ACI) has pub- lished Building Code Requirements for Struc- tural Concrete (ACI ) and Commentary. /R ACI Building Code and Commentary. PREFACE. The code portion of this document covers the design and construction of structural concrete .
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The center to center spacing of the spirals shall not exceed one-sixth of the core diameter.
Two speci- mens shall be made for each test at a given age, and not less than one Generated for Mohamed Aly Abdel-razik Moustafa University of California, Berkeley on Shrinkage reinforcement shall be provided in the slab at right angles to the joists equal to that required in Section Joints shall be detailed so as to allow sufficient tolerances for manufacture and erection of the members.
Where more than one-half of the bars are spliced within a length of 40 bar diameters or acii splices are made at points of maximum stress, special precautions shall be taken, such as increased length of lap and the use of 318-100 or closely-spaced stirrups around and for the length of the splice.
This reinforcement shall be designed to carry the load on the portion of the slab required for the flange of the T-beam. It is preferable to provide all ties in the form of extended stirrups.
When the specified concrete strengths are less than psi, the 3188-10 of lap shall be one-third greater than the values given above. Individually and through committees, and with the cooperation of many public and private agencies, members have correlated the results of research, from both field and laboratory, and of practices in design, construction, and manufacture.
In com- puting moments in columns due to gravity loading, the far ends of ack which are monolithic with the structure may be considered Generated for Mohamed Aly Abdel-razik Moustafa University of California, Sci on The overhanging portion of the flange of the beam shall not be considered as effective in computing the shear and diagonal tension resistance of T-beams.
Account shall be taken of any recesses which reduce the compressive area. By a standard hook, considered as developing 50 percent of the allowable stress in the bar, plus embedment sufficient to develop by bond the remaining 318-0 in the bar, in conformance with Chapters 13 and FLAT SLABS —Design procedures a Methods of analysis — All flat slab structures shall be designed in accordance with a recognized elastic analysis subject to the limita- tions of Sections andexcept that the empirical method of design given in Section may be used for the design of flat slabs conforming with the limitations given therein.
Web rein- forcement between the face of the support and the section at a distance d therefrom shall be the same as required at that section. The length of any such splice shall conform to Section When the shear stress exceeds 3″V fc’, every such deg line shall be crossed by 31-10 least two lines of web reinforcement.
The steel takes all the tension due to flexure. The stirrups shall extend into the member a distance d from the compression face. If a hollow metal core is used it shall be filled with concrete. A curve shall be established showing the relationship between water-cement ratio or cement content and compressive strength. Welded 31-10 reinforcement for walls shall be in flat sheet form.
A column strip consisting of the two adjacent quarter-panels, one each side of the column center line. Rectangular sections, or flanged sections in which the neutral axis lies within the flange: The equivalent of the bars so interrupted shall be provided by extra steel on all sides of the opening. Sections,Chapters 13 and 14, SectionChapter 18, Section aChapter 21, and Section b. The strength tests shall be made at 28 days or the earlier age at which the concrete is to receive load, as indicated on the plans.
Account shall also be taken of the loading condition giving the maximum ratio of bending moment to axial load. The piping and fittings shall be assembled by welding, braz- ing, solder-sweating, or other equally satisfactory method.
Where column capitals are used, the value of c shall be taken as the diameter of the cone described in Section b measured at the bottom of the slab or drop panel.
In determining the limiting deflection for a cantilever, I shall be taken as twice the distance from the support to the end, and the deflection shall be adjusted for movement of the support. The shear stresses at sections between the face of the support and the sec- tion a distance d therefrom shall not be considered critical.
318-08: Building Code Requirements for Structural Concrete and Commentary
The slab or footing in this case shall be designed as required in the remainder of this section. Points of abrupt change in section shall be adequately reinforced. Elongation requirements shall be taken from aver- age load-elongation curves for the steel used.
The flange shall be assumed to act as a cantilever.
Building Code Requirements for Structural Concrete and Commentary
The reinforcement in the top of the slab shall be parallel to the diagonal from the corner. Except as provided in 1, separation of the component elements in the direction normal to the surface shall be prevented by steel ties or other suitable mechanical anchorages.
The loading on the supports may be computed from the coefficients of the approved methods.