Also many job specs refer to aci 117standard tolerances for concrete construction and materials. Setting tolerances also demonstrate that some degree of variation is inherent in all building work. Introduction this commentary pertains to standard specifications for tolerances for concrete construction and mate rials aci117. Correlation between division 3 floor flatness ff and floor. Preferred tolerances in metric preferred tolerances in metric 121798 gw rev 1899 gw d780 p r2 a few world standards for round coldfinished steel bars iso 1829, ansi b4. Subsequent to the publication and use of the first edition, a plant certification program was established for the precast and prestressed concrete industry. Dimensional tolerances in precast concrete members. Pdf standard specifications for tolerances for concrete. This layer may be formed by excessive surface trowelling of concrete. Pdf premature failure of reinforced concrete structures occurs primarily due to early corrosion of steel. Dimensions and shapes of precast concrete structural members shall comply with tolerances given on the drawings or, when not so given, with those stated hereunder. Aci 117 tolerance conflicts concrete construction magazine. Inspection of prestressedprecast concrete products and. Tolerances for concrete construction and materials shall conform to all requirements of aci 117, standard specifications for tolerances for concrete construction and materials, published by the american concrete institute, detroit, michigan, except as modified by the requirements of.
Aci 117 specification for tolerances for concrete construction. Aci 11706 specifications for tolerances for concrete construction and materials and commentary mycivil. Standard specifications for tolerances for concrete construction and materials aci 11790 reported by aci committee 117 s. Precast structures should be designed and detailed so that the complete structure will be safe, functional, aesthetically appealing, and economical. Ascc believes the aci 117 90 tolerance for concrete is appropriate when plaster will be applied in at least two coats. For example, aci 117, specifications for tolerances for concrete construction and materials and commentary can be included without having to list the hundreds of individual tolerances given in the standard. Aci117m10 specification for tolerances for concrete construction and materials and commentary metric provides standard tolerances for concrete construction and materials. In america, astm e11551996 standard test method for determining f floor flatness and fl floor levelness numbers, and aci american concrete institute 117. Specifications for tolerances for concrete construction and materials and commentary aci 117 06 pca on. Constructed floor tolerances generally decline as the concrete dries in jointed floors because of curling of slab edges caused by the normal drying shrinkage of the concrete. Aug, 2015 aci11710 specification for tolerances for concrete construction and materials aci 117 10 and commentary, an aci standard, reported by aci committee 117, american concrete institute. Standard tolerances for concrete construction and materials. Tolerances for concrete construction tolerances for concrete. These are intended to be used as a basis for the development of an office master specification or in the preparation of specifications for a particular project.
Tolerances, according to the commentary to aci 117 are a means to establish permissible variation in dimension. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Tolerances for the floors placed on these suspended systems are often misunderstood. No structure is exactly level, plumb, straight, and true, so all construction and materials should be specified with tolerances limiting deviation from design values. Guide for tolerance compatibility in concrete construction author. Floor tolerances must be measured within 72 hours following construction if they are to be used for conformance purposes. Slump of hydraulic cement concrete fop for aashto t 119 scope.
Aci 117 specification for tolerances for concrete construction and materials this specification provides standard tolerances for concrete construction and is intended to be used as the reference document for establishing tolerances for concrete construction by specification writers and aci committees writing standards. Tolerances for concrete construction and materials shall conform to all requirements of aci 117, standard specifications for tolerances for concrete construction and materials, published by the american concrete institute, detroit, michigan, except as modified by the requirements of these contract documents. Specification for tolerances for concrete construction and materials aci 11710 and commentary aci 117r10. Top 10 tips for getting started with prezi video in your online classroom. Tolerances and suggested methods of mitigating tolerance conflicts for common concrete construction procedures and typical construction materials that interface with or connect to concrete. At the last aci convention, i asked committee 117 to determine and track ownership of tolerances. Tolerances for concrete construction tolerances for. Certain combinations of these result in conflicts and remediation that increases project costs. Tolerances for concrete foundation construction as per aci 117m10 1. Aci 117 10 specifications for tolerances for concrete construction and materials and commentary specifications for tolerances for concrete construction and materials and commentary aci on. For a onecoat, thin proprietary plaster product, consult the product manufacturer for tolerances. Remove the mold from the concrete by raising it carefully in a vertical direction. Programmes, projects and activities are the concrete elements which translate plans. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117.
Aci 117, except that fabrication tolerance for bar sizes nos. Section 4 is the longest part of aci 117, covering tolerances for castinplace concrete for buildings, including walls, floors, and slabs. Introduction concrete masonry is a popular building material because of its strength, durability, economy, and its resistance to fire. Aci 117 specifications for tolerances for concrete free download as powerpoint presentation. Guide to tolerances, materials and workmanship in new. Ascc believes the aci 11790 tolerance for concrete is appropriate when plaster will be applied in at least two coats. Aci 117 includes tolerances for fabrication, placement, cover, thickness, and elevation. Specifications for tolerances for concrete construction and. The report preface points out that its intent is to provide the tools to enable the party responsible for tolerances to develop a tolerance plant that will lead to.
Tolerances can be defined as the allowable variations from the specified values or performance levels. Engineering toolbox sketchup extension online 3d modeling. General tolerances based on the tolerancing principle specified in iso 8015 are only to be applied when the drawing concerned contains the reference tolerancing to iso 8015. This specification provides standard tolerances for concrete construction.
We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. If the specifier arbitrarily establishes a tolerance, he may be unknowingly prescribing the construction method to be. The challenge facing the designconstruction team is to identify and remove conflicts prior to construction. His paml is to make the least numbering to protein without at least some feature to item and this welcomes beaten worse by the big argument of deleterious thanks of local and several mikemiklos. Hole basis shaft basis description loose running fits are for wide commercial tolerances or allowances on.
Aci 11710 specifications for tolerances for concrete construction and materials and commentary specifications for tolerances for concrete construction and materials and commentary aci on. International concrete repair institute icri technical guideline no. Tolerance manual for precast and prestressed concrete. Aci 117 10 specification for tolerances for concrete construction and materials and commentary provides standard tolerances for concrete construction and materials. F number tolerances concrete floor contractors association. Specifications for tolerances for concrete construction. Standard tolerances for concrete construction and materials aci 11790 and commentary aci 117r90 aci committee 117 american concrete institute. Aci 318 building code requirements for structural concrete and commentary, 2011 edition. Architectural precast concrete products was prepared by the pci plant certification subcommittee for plant production of architectural precast concrete products. Add standard and customized parametric components like flange beams, lumbers, piping, stairs and more to your sketchup model with the engineering toolbox sketchup extension enabled for use with the amazing, fun and free sketchup make and sketchup pro. Jan 20, 2016 while setout tolerances are given in nzs 3604. This document is intended to be used by specification writers and aci committees writing standards as the reference document for establishing tolerances for concrete construction. Best practices guidelines for concrete construction.
Strike off the top surface of concrete with a screeding and rolling motion of the tamping rod. Aug 27, 2014 civilax is the knowledge base covering all disciplines in civil engineering. Sloped concrete and asphalt surfaces are an excellent example of this problem. Specifications and tolerances in precast concrete construction. Similarly the tolerances achievable with fixed forms, sliding forms and other types of forming systems can differ. Aci 11710 specifications for tolerances for concrete. The mason contractors association of america mcaa is the national trade association representing mason contractors. Clean overflow concrete away from the base of the mold. These guidelines are generally written in the imperative mood. Reference tables lawrence berkeley national laboratory.
Keep an excess of concrete above the top of the mold at all times. From among the possible defini tions of tolerance the one we have chosen to use in this article is given in. Aci11710 specification for tolerances for concrete construction and materials and commentary provides standard tolerances for concrete construction and materials. Other tolerances in this section dictate the maximum deviation from the planned location of the top surface elevation and the crosssectional dimensions of piers and footings. Flatness tolerances for randomtraffic floors concrete. Tolerances for concrete construction and mate rials shall conform to all. The proportions between the sorts aggregates and their quantities are establishing in table 5, so the grading curve of the final aggregate could be into the grading zone which was prescript. When specifying tolerances for concrete work, reference is often made to the australian standardsspecifications as 360. Astm specifications, bond patterns, cleaning, construction techniques, construction tolerances, grout, mortar. Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. Management of forest industries food and agriculture organization.
Tolerances for concrete foundation construction as per aci. Specifications for tolerances for concrete construction and materials and commentary aci committee 117 american concrete institute, 2006 concrete 70 pages. Aci 117 06 specifications for tolerances for concrete construction and materials and commentary mycivil. When these groups have a realistic understanding of floor tolerances, they can specify flatness in the most costeffective way. Aci tolerances for concrete construction concrete construction. The tolerances contained within the manual are based on current modern precast concrete production techniques.
Tolerances for concrete construction from aci 117 and other industry standards developed by trade and standards writing organizations are discussed. Aci 11706 specifications for tolerances for concrete. Guide specifications for specifying precastprestressed concrete are available below. Effects of batch ing inaccuracies of water and ways to reduce it have been addressed in earlier articles. Concrete masonry construction tek 38a construction 2001 keywords. Surface tolerances for insitu concrete architecture. To our knowledge, none of the industry associations have developed official tolerances for sloped concrete or asphalt. Page 1 of 5 ada tolerances provisions contentedits. Aci11710 specification for tolerances for concrete. Aci 117 90, standard specifications for tolerances for concrete construction and materials, gives only two tolerances for these applications. Add the engineering toolbox extension to your sketchup from the sketchup. The layer of concrete on which the cement concrete topping is laid.
Proper methods of setting and measuring concrete floor construction tolerances are important to owners, vehicle manufacturers, and designers, as well as to floor contractors. It is intended to be used with aci 117 for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein. The mcaa is committed to preserving and promoting the masonry industry by providing continuing education, advocating fair codes and standards, fostering a safe work environment, recruiting future manpower, and marketing the benefits of masonry materials. This guide lists industrystandard tolerances and presents recommendations for mitigating tolerance conflicts related to embedded items, elevator cores and hoistways, openings in slabs and walls, manufactured couplers and splicing systems for reinforcing \. For acceptable hollows or mounds in concrete floor slabs, the mbie guide to tolerances, materials and workmanship in new residential construction 2015 references nzs 3114. This report is a commentary on the specification for tolerances for concrete construction and materials aci 117. Appendix e construction tolerances part 645 national engineering handbook 2. Aci 117 reports the tolerances generated by other aci committees 318, 301, 315, etc. This is the most difficult question and the most subject to varying opinions. There are different plumb deviation tolerances based on the materials used for foundation construction and material in which the foundation has been constructed. Specification for tolerances for concrete construction and. History of aci 117 tolerance 1990 aci adopts standard specification for tolerances for concrete construction 2006 aci 11706 document was published. Castinplace concrete structure tolerances are based on those in aci 117 specification for tolerances for concrete construction and materials. This guide lists industrystandard tolerances and presents recommendations for mitigating tolerance conflicts related to embedded items, elevator cores and hoistways, openings in slabs and walls, manufactured couplers and splicing systems for reinforcing \ bars, stairs, cladding.
Aci 117 standard tolerances for concrete construction and materials. Aci 11790, standard specifications for tolerances for concrete construction and materials, gives only two tolerances for these applications. The 10 foot straightedge method has been a standard in aci 117, standard tolerances for concrete construction, for many years and is optional as part of aci 117. Aci117m10 specification for tolerances for concrete. General tolerances for iinearand angular din dimensions and. This document is intended to be used by specification writers and aci committees writing standards as the reference document for establishing tolerances for concrete construction and materials. This document is intended to be used as the reference document for establishing tolerances for concrete construction by specification writers and aci committees writing. If tolerances stricter than those given in an industry standard are required for a specific project, these should be stated, with the. When the 10 foot straightedge method is used for random traffic floors, aci 117 sets the minimum number of samples required at 0. The tolerances achievable with precast concrete and castinplace concrete are likely to be quite different.
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