Document Name: ACI 3 1 8: Building Code Requirements for Reinforced Concrete CFR Section(s): 30 CFR (d)(1) Standards Body: American Concrete. BY ORDER OF THE EXECUTIVE DIRECTOROffice of the Federal RegisterWashington, Authority of the Code of Federal Regulations. ACI Building Code Requirements for Structural Concrete (ACI ) and MANUAL OF CONCRETE PRACTICE CODE COMMENTARY.
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Cai the column base, provision shall be made to transfer the load to the footing at safe unit stresses in accordance with Section a. Aggregate—Inert material which is mixed with portland cement and water to produce concrete. Available soon, it will aid the design of structural members by ultimate strength methods compatible with the Building Code. Sections,Chapters 13 and 14, Section xci, Chapter 18, Section aChapter 21, and Section b.
Web reinforcement shall be anchored at both ends in accordance with Section Flat slabs within the limitations of Sectionwhen designed by elastic analysis, may have resulting analytical moments reduced in such proportion that the nu- merical sum of the positive and average negative bending moments Generated for Mohamed Aly Abdel-razik Moustafa University of California, Berkeley on The reinforcement in the bottom of the slab shall be at right angles to the diagonal or may be of Generated for Acj Aly Abdel-razik Moustafa University of California, Berkeley on In T-shaped sections allowance shall be made for the effect of flange.
These requirements shall not apply to compression reinforcement.
ACI 318: Building Code Requirements for Reinforced Concrete
The numerical sum of the positive and negative bending moments in the direction of either side of a rectangular panel shall be assumed as not less than in which F — 1. In the area common to two column strips, not more than one-eighth of the width of strip in any span 318-29 be interrupted by openings. Shear as a measure of diagonal tension shall be computed in conformance with Section or The spacing of the bars shall not exceed five times the thickness of the flange, nor in any case 18 in.
These aaci may be achieved through many equally satisfactory methods. The maximum pressure to which any piping or fittings shall be subjected shall be psi above atmospheric pressure.
FOOTINGS g In sloped or stepped footings, the supporting area for bearing may be taken as the top horizontal surface of the footing, or assumed as the area of the lower base of the largest frustum of a pyramid or cone contained wholly within the footing and having for its upper base the area actually loaded, and having side slopes of one vertical to two horizontal.
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Where the bar size exceeds Hj welded splices or other positive connections shall preferably be used. The Building Official may require a reasonable number of additional tests during the progress of the work. When additional vertical ties are used the allowable bond stress on a rough surface may be increased at the rate of 75 psi for each additional area of steel ties equal to 1 percent of the con- tact area.
The effects of shoring, or lack of shoring, on deflections and stresses shall be considered. Pretensioning tendons immediately after transfer, or posttensioning tendons immediately after anchoring Bars shall be spaced approximately uniformly across each panel strip, except: When the specified concrete strengths are less than psi, the amount of lap shall be one-third greater than the values given above.
The maximum permissible water-cement ratio for the concrete to be used aaci the struc- ture shall be that shown by the curve to produce an average strength to satisfy the requirements of Section provided that the water-cement ratio shall be no greater than that required by Section c.
Building Code Requirements for Structural Concrete and Commentary (ACI 318-08, ISO 19338:2007)
Loads, including live, afi, lateral, and impact 3. The spacing for the remainder of the column strip may vary uniformly from that required for a or b to that required for the middle strip.
Bonded tendons — Tendons which are bonded to the concrete either directly or through grouting. Web reinforce- ment between the face of the support and the section acu a distance d therefrom shall be the same as required at that section.
Full text of “ACI Building Code Requirements for Reinforced Concrete”
At least 50 percent of the required negative reinforce- ment in the column strip shall cross the drop panel, if any.
Help Center Find new research papers in: Fatigue of Concrete, Bibliography No. Plain concrete—Concrete that does not conform to the definition for reinforced concrete. At least one tie at each spacing shall extend completely around all longitudinal bars.
Where the negative moment on one side of a support is less than 80 percent of that on the other side, the difference shall be distributed in proportion to the relative stiffnesses of the slabs.
If relative lateral displacement of the ends of the members is prevented and the member is bent in single curvature, avi fol- lowing factor shall be used 3.
Transfer of loads to the metal core shall be provided for by the use of bearing members such as billets, brackets, or other positive connec- tions; these shall be provided at the top of the metal core and at in- termediate floor levels where required. The total thickness, tu in inches, of slabs without drop panels, or through the drop panel if any, shall be at least 3.
Such conduits or pipes shall be so located as not 3118-92 impair the strength of the construction.