It includes delivery, handling, and storage of the casing, excavation, soil testing, placing of concrete and reinforcing steel, and inspection. Aci 117 90 standard specifications for tolerances for concrete construction and materials by published updated this article is about aci 117 90 standard specifications for tolerances for concrete construction and materials and focusing to the engineers, technicians and supervisors. The committee has developed standard tolerances for concrete construction materials. According to aci 117, the tolerance for the 112 in. Location of weldedwire reinforcement in concrete slabs. Do not exceed the placing tolerances specified in aci 318 and aci 117, whichever is more stringent, before concrete is placed. Aci 117 specification for tolerances for concrete construction and materials, 2010 edition aci 11710 provides the permissible tolerances on concrete cover and other variables than may affect cover thickness. This is unlikely to be included in a reinforcing bar 3d model. No structure is exactly level, plumb, straight, and true, so all construction and materials should be specified with tolerances limiting deviation from design values. The need to specify tolerances from among the possible definitions of tolerance the one we have chosen to use in this article is given in cement and concrete terminology, by american concrete institute aci committee 116. Dec 06, 2016 aci 11710 reapproved 2015 specifications of tolerances for concrete construction and materials and commentary, american concrete institute aci, 2015. Mandatory specification checklist in aci 117 10, notes to the architectengineer, states, tolerances for fabrication, placement, and lap splices for weldedwire reinforcement must be.
These tolerances require monitoring to construct the structure as designed. Aci 117 06 specifications for tolerances for concrete construction and materials and commentary mycivil. The astm standards and the aci 318 building code describe how to inspect and evaluate rusted reinforcing bars. This specification provides standard tolerances for concrete construction and materials. Steel reinforcement shall be accurately placed in the positions shown on the drawings and firmly held during the placing and setting of concrete by means of. Aci 11790 standard specifications for tolerances for. Thus a tolerance in level of a ceiling amounting to. Placing reinforcing steel reinforcing takeoff, rebar.
As such, a jointbyjoint evaluation is important in evaluating the potential impact of rotational misalignments on pavement performance. Aci 11710 supersedes aci 11706 and was adopted march 1, 2010 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. Testing the surface for compliance using a straightedge. As the title specifications for tolerances for concrete construction and materials aci 117 implies, the toler ances given are standard or usual tolerances that apply to various types and uses of concrete construction. 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. Aci tolerances for fabricated reinforcing bars have been developed by crsi. I believe aci 117 is an aci document on tolerances.
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. Tolerances for concrete foundation construction as per aci 117m10 1. Specification for tolerances for concrete construction and materials aci 11710 and commentary an aci standard reported by aci committee 117 aci 11710 specification synopsis. The 2010 revision of aci 117 greatly expanded the straightedge method for determining floor flatness note that. The tolerances on rebar position, as defined by aci 117, tolerances for concrete construction and materials, are shown in the table. I thought it was in chapter 19 of the ibc but it looks like it points directly to aci 318, but where in there. Aci117 rebar placement tolerances structural engineering.
The default is a finish that meets conventional straightedge tolerances specified in aci 117. Reinforcement shall be placed within the tolerances provided in aci 117. When looking in forms to verify rebar placement, where do you find the minimum requirements for distance to the edge of concrete whether exposed or against the earth. Aci 117 includes tolerances for fabrication, placement, cover, thickness, and elevation.
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. Reinforcement may not be wet set in concrete pours. The dispute arises from differing tolerances for anchor bolt placement given by the concrete industry in aci 11790, standard specifications for tolerances for concrete construction and materials, and by the steel industry in the aisc code of standard. Correlation between division 3 floor flatness ff and floor. Aci 117 begins by defining what the tolerances mean in terms of such things as bowing, deviation, flatness, and levelness, and provides drawings to help explain these terms. As the title specifications for tolerances for concrete construction and materials aci 117 implies, the tolerances given are standard or usual tolerances that apply to various types and uses of concrete construction. The aci 117 tolerances for concrete cover measured. Minimum concrete cover for reinforcement and couplers shall be as indicated in the contract drawings. However, dirt, grease, or other deleterious materials on the bars, i. Comply with camber and dimensional tolerances of aci 318 and pci mnl 5, tolerance manual for. Guide to formed concrete surfaces presented by technical.
Aci 117, standard specifications for concrete construction and materials. Dec 19, 2010 aci 117 includes tolerances for fabrication, placement, cover, thickness, and elevation. Specifications for tolerances for concrete construction aci 117 is adopted by aci 332 in section 7. The contractor will be allowed to cut the frp reinforcement with a high speed grinding cutter, fine blade saw, diamond blade or masonry blade with the prior approval of the engineer. Can anyone please tell us, which is code we need to refer for construction tolerance. Slab thickness and base tolerances slab thickness is the greatest single factor controlling the loadcarry capacity of a slabonground. Placing tolerances per aci 117 06, the tolerance on cover varies from 14 to 12 in.
Specification for tolerances for concrete construction and materials aci 117 10 and commentary an aci standard reported by aci committee 117 aci 117 10 specification synopsis. Aci 117 specification for tolerances for concrete construction and materials, 2010 edition aci 117 10 provides the permissible tolerances on concrete cover and other variables than may affect cover thickness. They are based on normal needs and common construction techniques and practices. Reinforcement in drilled shaft deep foundations pieresearch. This report is a commentary on the specification for tolerances for concrete construction and materials aci 117. Unless the specifier states a floor finish tolerance, aci 301 defaults to an overall 2015 and a local 1510 for flatness and levelness numbers. Aci 117 tolerance conflicts concrete construction magazine. Specification for tolerances for concrete construction and materials aci 117 10 and commentary aci 117r10 this specification designates standard tolerances for concrete construction. Tolerances for concrete construction tolerances for. The challenge facing the design construction team is to identify and remove conflicts prior to construction. Aci 347r14 describes four categories of formed concrete surfaces, same as in aci 117tolerances aci 303r12 addresses architectural concrete ascc educational and training committee uses samples to illustrate expectations no longer available aci 309r05 provides information on consolidation of concrete and visible effects.
The contractor shall place the frp reinforcement within the tolerances as specified in aci 117. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117. They are based on normal needs and common construction tech niques and practices. Minimum rebar to exposed concrete edge the building code. Jan 24, 2007 aci 117 begins by defining what the tolerances mean in terms of such things as bowing, deviation, flatness, and levelness, and provides drawings to help explain these terms. Fling chairman, editorial subcommittee andrawos morcos b.
Sep 04, 2012 the tolerances on rebar position, as defined by aci 117, tolerances for concrete construction and materials, are shown in the table. Tolerances are typically divided into three primary categories. The challenge facing the designconstruction team is to identify and remove conflicts prior to construction. Aci 117, standard tolerances for concrete construction and materials. The rotational misalignments govern joint movements. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117m. In most cases, it is best to refer to industry standard tolerances or other industry documents when they exist. Reinforcing steel bars location, concrete cover and clearance shall not.
Materials that interface with or connect to concrete. What are the tolerance limits on construction site. This specification provides standard tolerances for concrete. Specification for tolerances for concrete construction and materials. The variation from the straightedge is typically expressed as a maximum deviation value over the straightedge length but can be assessed by the method provided in aci 1174. When the 10 foot straightedge method is used for random traffic floors, aci 117 sets the minimum number of samples required at 0. Specification for tolerances for concrete construction and materials aci 11710 and commentary aci 117r10. This variation can usually be in either of two directions. Material tolerances are in section 2, including the location tolerance for reinforcing bars, which varies depending on the thickness of the concrete member. It is intended to be used with aci 117m for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances. Tolerances for concrete foundation construction as per aci.
Tolerances in this specification are for typical concrete construction and construction procedures and are applicable to exposed concrete and to architectural concrete. Certain combinations of these result in conflicts and remediation that increases project costs. Acceptable construction tolerance for rebar placement concrete. Tests have indicated that water soluble cutting oils, those used when. You might reference buy that and see what it prescribes. Correlation between division 3 floor flatness ff and. Specification for the construction of drilled piers aci 336. Construction tolerances are included in standard specifications. This variation can usually be in either of two directions and so can be regarded as positive or negative. Cement and concrete terminology, by american concrete institute. There are different plumb deviation tolerances based on the materials used for foundation construction and material in which the foundation has been constructed. Aci 117 06 2006 specifications for tolerances for concrete construction and materials american concrete institute, farmington hills, mi. Specification for tolerances for concrete construction and materials aci 11710 and.
Aci 301 also has a default floorfinish tolerance requirement for a troweled and floated finish. Aci 117 only specifies elevation item 3 and a location tolerance for the centerline of individual anchor bolts item 6. Reinforcing steel for structures designed under the provisions of aci 349, aci 359, and other similar documents can generally incorporate the direction given in this standard unless otherwise prohibited by the provisions of the respective related documents. Tolerances for concrete construction tolerances for concrete. If the wall is also designed to withstand out of plane bending forces, then the effective depth d is greater than 8 in.
Constructability of embedded steel plates in castinplace. Placing tolerances shall not reduce cover requirements except as specified in aci 117. Standard specifications for tolerances for concrete construction and materials aci 11790 reported by aci committee 117 s. Pdf aci 11706 specifications for tolerances for concrete.
Aci tolerances for concrete construction concrete construction. The tolerance for reduction in cover in reinforcing steel may require a reduction in magnitude. The indicated tolerances govern unless otherwise specified. Aci 11710 specification for tolerances for concrete. Placing reinforcing steel concrete construction magazine. Examples aci 117 placement of nonprestressed reinforcement, measured from form surface.
Specification for tolerances for concrete construction and materials aci 117 10 and commentary aci 117r10. This is particularly critical when the embeds have very thick plates photo courtesy of bruce suprenant fig. Aci 11710 specification for tolerances for concrete construction. Aci 117 is good for tolerance, but that is based on america. Specification for tolerances for concrete construction and.
Constraints on reinforcing bar modeling civil engineering. Aci 11706 2006 specifications for tolerances for concrete construction and materials american concrete institute, farmington hills, mi. Aci 347r14 describes four categories of formed concrete surfaces, same as in aci 117 tolerances aci 303r12 addresses architectural concrete ascc educational and training committee uses samples to illustrate expectations no longer available aci 309r05 provides information on consolidation of concrete and visible effects. Tolerances, according to the commentary to aci 117 are a means to establish.
Errata 2011 specifications for tolerances for concrete construction and materials and commentary aci 440. Aci 31814 building code requirements for structural concrete and commentary, isbn 9780870319303 2014 aci 315, details and detailing of concrete reinforcing. History of aci 117 tolerance 1990 aci adopts standard specification for tolerances for concrete construction 2006 aci 117 06 document was published. Common us specifications, published by aci and astm, are.
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