ACI 318-92 PDF
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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Halfway between the middle and the edge of the wall, for footings under masonry walls 3.
Full text of “ACI Building Code Requirements for Reinforced Concrete”
Stirrups making an angle of sci deg or more with the longi- tudinal tension reinforcement Generated for Mohamed Aly Abdel-razik Moustafa University of California, Berkeley on Slabs with recesses or pockets made by permanent or re- movable fillers between reinforcing bars may be considered flat slabs. They shall not be used at points of sharp curvature.
The pressure test shall be held for 4 hr with no drop in pressure except that which may be caused by air temperature. Formwork for Concrete, SP-4, 8y2Xll-in.
The testing pressure above atmos- pheric pressure shall be 50 percent in excess of the pressure to which the piping and fittings may be subjected but the minimum testing pressure shall be not less than psi above atmospheric pressure. Screw connections shall be prohibited. Splices of wires stressed at not more than one-half the per- missible stress shall be so made that the overlap measured between outermost cross wires is not less than 2 in.
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.
Calcium chloride shall not be used. Tendon — A tensioned steel element used to impart prestress to the concrete. For positive moments, w is to be separated into dead and live loads for use in Tables 2 and 3. 31-892 spans discontinuous at both ends, g or gi shall be taken as unity. It is possible 3189-2 heirs or the estate of the authors of individual portions of the work, such as illustrations, assert copyrights over these portions.
The average of the values of M0, as determined for the two parallel half column strips in a panel, shall be used in de- termining bending in the middle strip. 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 acj be provided at the top of the 318-29 core and at in- termediate floor levels where required.
Since this primary objective has been achieved by a combined membership effort. Note that concrete strengths are based on standard 6 x in.
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. Horizontal disposition of ducts shall allow proper placement of concrete. Identification marks shall be reproduced from the placing plans. ACI standards and recommendations “Building Code Requirements for Reinforced Concrete” are minimum standards of performance in legally enforceable phraseology.
Elongation requirements shall be taken from aver- age load-elongation curves for the steel used. The effects of creep, shrinkage, and temperature need not be considered except in un- usual cases.
Critical sections for moment calculations are located as follows: The control of con- struction shall be consistent with the design method selected by the engineer. The concrete covering of the pipes and fittings shall be not less than 1 318–92.
The term j is omitted in the determination of nominal shear stress. Soil 138-92 shall be considered as acting uniformly or vary- ing linearly, except that other assumptions may be made consistent with the properties of the soil and the structure and with estab- lished principles of soil mechanics.
The center to center spacing of reinforcement shall be not more than three times the slab thickness and the ratio of reinforcement 31892 each direction shall be not less than required by Section Except in calculations for deflections, the value of n for lightweight concrete shall be assumed to be the same for normal weight concrete of the same strength.
The continuing bars provide double the area required for flexure at that point or double the perimeter required for flexural acu. This Board shall be composed of competent engineers and shall have the authority to investigate the data so submitted, to require tests, and to formulate rules governing the design and construction of such sys- tems to meet the intent of this code.
If the total torsional stiffness in the plane of a continuous system at a joint does not exceed 20 percent of the flexural stiff- ness at the joint, the torsional stiffness need not be taken into account in the analysis. Unless otherwise provided, the bending moments at the criti- cal acu of the column and middle strips shall be at least those given in Table f.
The shear is not over half aco normally permitted, including allowance for shear reinforcement, if any.
Building Code Requirements for Structural Plain Concrete Aci 318-92
Combinations of 1 or 2 with 3 c Stirrups or other bars to be considered effective as web rein- forcement shall be anchored at both ends according to the provisions of Section These drawings, details, and specifications shall show the size and position of all structural elements and reinforcing steel; pro- vision for dimensional changes resulting from creep, shrinkage, and temperature; the specified strength of the concrete at stated ages; the specified strength of the reinforcing steel; the magnitude and location of prestressing forces; and the live load used in the design.
Such slab shall be reinforced at right angles to the joists with at least the amount of reinforcement required for flexure, giving due consideration to con- centrations, if any, but in no case shall the reinforcement be less than that required by Section If concrete surfaces after removal of the forms are to be ex- posed to the weather or be in contact with the ground, the reinforce- ment shall be protected with not less than 2 in.
Strains vary linearly with depth through the entire load range. Beams, girders, brackets, column capitals, and haunches shall be considered as part of the floor system and shall be placed mono- lithically therewith.