CHAPTER 19 CONCRETE - iccsafe.org

1 CHAPTER 19 CONCRETESECTION BC provisions of this CHAPTER shall govern thematerials, quality control, design and construction of concreteused in Plain and reinforced concreteshall be designed and constructed in accordance with therequirements of this CHAPTER and ACI 318 as amended in Sec-tion 1908 of this code. Except for the provisions of Sections1904 and 1911, the design and construction of slabs on gradeshall not be governed by this CHAPTER unless they transmit verti-cal loads or lateral forces from other parts of the structure to Source and 1902 through 1907of this CHAPTER are derived from the provisions for structuralconcrete in ACI 318. Where sections within Chapters 2through 7 of ACI 318 are referenced in other chapters andappendices of ACI 318, the provisions of Sections 1902through 1907 of this code shall Construction construction docu-ments for structural CONCRETE construction shall include:1.

2 Specified compressive strength of CONCRETE at the statedages or stages of construction for which each concreteelement is Specified strength or grade of Size and location of structural elements, reinforcement,and Provision for dimensional changes resulting fromcreep, shrinkage and Magnitude and location of prestressing Anchorage length of reinforcement and location andlength of lap Type and location of mechanical and welded splices Details and location of contraction or isolation jointsspecified for plain Minimum CONCRETE compressive strength at time Stressing sequence for posttensioning For structures assigned to Seismic Design Category D,a statement if slab on grade is designed as a structuraldiaphragm (see Section of ACI 318).

3 12. Freezing and thawing and deicing chemical exposureclassifications (see Section ).13. Sulfate exposure classification (see Section ).14. Maximum water soluble chloride ion (CI) concentra-tions (see Section ). Special special inspection of concreteelements of buildings and structures and concreting operationsshall be in accordance with CHAPTER BC following words and terms shall have themeanings shown other than water, aggregate orhydraulic cement, used as an ingredient of CONCRETE and addedto CONCRETE before or during its mixing to modify its material, such as sand, gravel,crushed stone and iron blast-furnace slag, used with a cement-ing medium to form a hydraulic cement CONCRETE or , with a dry,loose weight of 70 pounds per cubic foot (pcf) (1120 kg/m3)

4 As specified inSection 1903 that have cementing value when used in concreteeither by themselves, such as portland cement, blendedhydraulic cements and expansive cement, or such materials incombination with fly ash, other raw or calcined naturalpozzolans, silica fume, and/or ground granulated member with a ratio of height-to-least-lateraldimension exceeding three, used primarily to support axialcompressive mixture of portland cement or any otherhydraulic cement, fine aggregate, coarse aggregate and water,with or without , SPECIFIED COMPRESSIVESTRENGTH OF, (f'c).The compressive strength of concreteused in design and evaluated in accordance with the provisionsof Section 1905, expressed in pounds per square inch (psi)(MPa).

5 Whenever the quantityf'cis under a radical sign, thesquare root of the numerical value only is intended, and theresult has units of psi (MPa).CONTRACTION , sawed or tooled groove ina CONCRETE structure to create a weakened plane and regulate thelocation of cracking resulting from the dimensional change ofdifferent parts of the reinforcingbars, bar mats, deformed wire, welded plain wire fabric andwelded deformed wire fabric conforming to ACI 318, conduit (plain or corrugated) to accommodateprestressing steel for postensioned NEW YORK CITY BUILDING :\data\CODES\STATE CODES\New York City\2008\Building\Final VP\ , August 14, 2008 9:10:57 AMColor profile: Generic CMYK printer profileComposite Default screenEFFECTIVE DEPTH OF SECTION (d).

6 The distance mea-sured from extreme compression fiber to the centroid of ten-sion separation between adjoining parts ofa CONCRETE structure, usually a vertical plane, at a designed loca-tion such as to interfere least with performance of the structure,yet to allow relative movement in three directions and avoidformation of cracks elsewhere in the CONCRETE and throughwhich all or part of the bonded reinforcement is upright compression member with a ratio ofunsupported height-to-average-least-lateral dimension of threeor CONCRETE with no reinforce-ment or with less reinforcement than the minimum amountspecified for reinforced that does notconform to the definition of "Deformed reinforcement" (seeACI 318, Section ).

7 Of prestressing in whichprestressing steel is tensioned after CONCRETE has structural CONCRETE element castelsewhere than its final position in the CONCRETE in whichinternal stresses have been introduced to reduce potential ten-sile stresses in CONCRETE resulting from steel element suchas wire, bar or strand, or a bundle of such elements, used toimpart prestress forces to of prestressing in whichprestressing steel is tensioned before CONCRETE is CONCRETE rein-forced with no less than the minimum amounts of prestressingsteel or nonprestressed reinforcement specified in ACI 318,Chapters 1 through 21 and ACI 318 Appendices A through that conforms to , excluding prestressing steel unless placed snugly under a CONCRETE slab orother structural member after the original forms and shoreshave been removed from a larger area, thus requiring the newslab or structural member to deflect and support its own weightand existing construction loads applied prior to the installationof the or inclined support members designed tocarry the weight of the formwork, CONCRETE and constructionloads wound rein-forcement in the form of a cylindrical on the floor of anyparts of the CONCRETE formwork, including shoring, bracing andother used to resist shear and torsionstresses in a structural member.

8 Typically bars, wires or weldedwire fabric (plain or deformed) either single leg or bent into L,U or rectangular shapes and located perpendicular, or at anangle to, longitudinal reinforcement. (The term "stirrups" isusually applied to lateral reinforcement in flexural membersand the term "ties" to those in compression members.)STRUCTURAL used for structuralpurposes, including plain and reinforced pretensioning applications, the tendon is theprestressing steel. In posttensioned applications, the tendon is acomplete assembly consisting of anchorages, prestressing steeland sheathing with coating for unbonded applications or ductswith grout for bonded BC 1903 SPECIFICATIONS FOR TESTS AND used to produce CONCRETE and test-ing thereof shall comply with the applicable standards listed inACI 318 and this section.

9 Tests of CONCRETE and the materialsused in CONCRETE shall be in accordance with ACI 318, Where required, special inspections and tests shall be inaccordance with CHAPTER used to produce CONCRETE shall com-ply with ACI 318, Section used in CONCRETE shall complywith ACI 318, Section used in mixing CONCRETE shall be cleanand free from injurious amounts of oils, acids, alkalis, salts,organic materials or other substances that are deleterious toconcrete or steel reinforcement and shall comply with ACI 318,Section Steel and welding ofreinforcement to be placed in CONCRETE construction shall con-form to the requirements of this Reinforcement shall bedeformed reinforcement, except plain reinforcement ispermitted for spirals or prestressing steel, and reinforce-ment consisting of structural steel, steel pipe or steel tub-ing is permitted where specified in ACI shall comply with ACI 318, Section of reinforcing bars shallconform to AWS Type and location of weldedsplices and other required welding of reinforcing barsshall be indicated on the construction documents or inthe project specifications.

10 The ASTM reinforcing barspecifications, except for ASTM A 706, shall be supple-mented to require a report of material properties neces-sary to conform to the requirements in AWS Awritten welding procedure shall be provided to the regis-tered design professional of record for approval prior toany welding. All welding shall be subject to specialinspection by an approved to be used in CONCRETE shallbe subject to prior approval by the registered design profes-sional of record and shall comply with ACI 318, Section NEW YORK CITY BUILDING :\data\CODES\STATE CODES\New York City\2008\Building\Final VP\ , August 14, 2008 9:10:58 AMColor profile: Generic CMYK printer profileComposite Default Storage of storage of materials for usein CONCRETE shall comply with the provisions of and Manner of materials andaggregates shall be stored in such a manner as to preventdeterioration or intrusion of foreign Unacceptable material that hasdeteriorated or has been contaminated shall not be used Glass fiber reinforced fiber rein-forced CONCRETE (GFRC)