The tolerances on rebar position, as defined by aci 117, tolerances for concrete construction and materials, are shown in the table. This report is a commentary on the specification for tolerances for concrete construction and materials aci 117. However, dirt, grease, or other deleterious materials on the bars, i. Specification for tolerances for concrete construction 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. I thought it was in chapter 19 of the ibc but it looks like it points directly to aci 318, but where in there. Aci 117 06 2006 specifications for tolerances for concrete construction and materials american concrete institute, farmington hills, mi. 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. 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. Examples aci 117 placement of nonprestressed reinforcement, measured from form surface. 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. Can anyone please tell us, which is code we need to refer for construction tolerance. Mandatory specification checklist in aci 117 10, notes to the architectengineer, states, tolerances for fabrication, placement, and lap splices for weldedwire reinforcement must be.
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. 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. The aci 117 tolerances for concrete cover measured. Specification for tolerances for concrete construction and materials aci 11710 and. 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. 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. There are different plumb deviation tolerances based on the materials used for foundation construction and material in which the foundation has been constructed. Slab thickness and base tolerances slab thickness is the greatest single factor controlling the loadcarry capacity of a slabonground. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117. This variation can usually be in either of two directions.
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 toler ances given are standard or usual tolerances that apply to various types and uses of concrete construction. Placing tolerances per aci 117 06, the tolerance on cover varies from 14 to 12 in. Errata 2011 specifications for tolerances for concrete construction and materials and commentary aci 440. Unless the specifier states a floor finish tolerance, aci 301 defaults to an overall 2015 and a local 1510 for flatness and levelness numbers. The rotational misalignments govern joint movements. Cement and concrete terminology, by american concrete institute. They are based on normal needs and common construction techniques and practices. Dec 19, 2010 aci 117 includes tolerances for fabrication, placement, cover, thickness, and elevation. 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. As such, a jointbyjoint evaluation is important in evaluating the potential impact of rotational misalignments on pavement performance.
Do not exceed the placing tolerances specified in aci 318 and aci 117, whichever is more stringent, before concrete is placed. Aci 11790 standard specifications for tolerances for. Aci117 rebar placement tolerances structural engineering. Aci tolerances for concrete construction concrete construction.
The astm standards and the aci 318 building code describe how to inspect and evaluate rusted reinforcing bars. 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 117 tolerance conflicts concrete construction magazine. Aci 11710 specification for tolerances for concrete. According to aci 117, the tolerance for the 112 in. 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. History of aci 117 tolerance 1990 aci adopts standard specification for tolerances for concrete construction 2006 aci 117 06 document was published. You might reference buy that and see what it prescribes. Tolerances are typically divided into three primary categories.
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. Specification for tolerances for concrete construction and materials aci 11710 and commentary an aci standard reported by aci committee 117 aci 11710 specification synopsis. Aci tolerances for fabricated reinforcing bars have been developed by crsi. 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. Placing reinforcing steel reinforcing takeoff, rebar. The challenge facing the designconstruction team is to identify and remove conflicts prior to construction. Aci 117 is good for tolerance, but that is based on america. This report is a commentary on the specifications for tolerances for concrete construction and materials aci 117m. Certain combinations of these result in conflicts and remediation that increases project costs. 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. Testing the surface for compliance using a straightedge. This is unlikely to be included in a reinforcing bar 3d model. Aci 31814 building code requirements for structural concrete and commentary, isbn 9780870319303 2014 aci 315, details and detailing of concrete reinforcing.
Specifications for tolerances for concrete construction aci 117 is adopted by aci 332 in section 7. Fling chairman, editorial subcommittee andrawos morcos b. Thus a tolerance in level of a ceiling amounting to. These tolerances require monitoring to construct the structure as designed. Placing reinforcing steel concrete construction magazine. This specification provides standard tolerances for concrete. Aci 117, standard specifications for concrete construction and materials. Acceptable construction tolerance for rebar placement concrete. Placing tolerances shall not reduce cover requirements except as specified in aci 117.
They are based on normal needs and common construction tech niques and practices. It includes delivery, handling, and storage of the casing, excavation, soil testing, placing of concrete and reinforcing steel, and inspection. Specification for the construction of drilled piers aci 336. Reinforcement in drilled shaft deep foundations pieresearch. Correlation between division 3 floor flatness ff and. Guide to formed concrete surfaces presented by technical. 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. 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.
When the 10 foot straightedge method is used for random traffic floors, aci 117 sets the minimum number of samples required at 0. If the wall is also designed to withstand out of plane bending forces, then the effective depth d is greater than 8 in. 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 2010 revision of aci 117 greatly expanded the straightedge method for determining floor flatness note that. Standard specifications for tolerances for concrete construction and materials aci 11790 reported by aci committee 117 s. The indicated tolerances govern unless otherwise specified. Aci 117 includes tolerances for fabrication, placement, cover, thickness, and elevation. Comply with camber and dimensional tolerances of aci 318 and pci mnl 5, tolerance manual for. Aci 117 only specifies elevation item 3 and a location tolerance for the centerline of individual anchor bolts item 6. Tolerances in this specification are for typical concrete construction and construction procedures and are applicable to exposed concrete and to architectural concrete. Tests have indicated that water soluble cutting oils, those used when. Specification for tolerances for concrete construction and materials aci 117 10 and commentary aci 117r10 this specification designates standard tolerances for concrete construction.
Minimum concrete cover for reinforcement and couplers shall be as indicated in the contract drawings. I believe aci 117 is an aci document on tolerances. Reinforcement may not be wet set in concrete pours. Minimum rebar to exposed concrete edge the building code. Tolerances for concrete foundation construction as per aci. Construction tolerances are included in standard specifications. Aci 301 also has a default floorfinish tolerance requirement for a troweled and floated finish. 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. Reinforcement shall be placed within the tolerances provided in aci 117.
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. Reinforcing steel bars location, concrete cover and clearance shall not. What are the tolerance limits on construction site. 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. Dec 06, 2016 aci 11710 reapproved 2015 specifications of tolerances for concrete construction and materials and commentary, american concrete institute aci, 2015. All acl tolerances are now being consolidated under the auspices of acl committee 117, tolerances.
The challenge facing the design construction team is to identify and remove conflicts prior to construction. Aci 11710 specification for tolerances for concrete construction. The committee has developed standard tolerances for concrete construction materials. Pdf aci 11706 specifications for tolerances for concrete. Sep 04, 2012 the tolerances on rebar position, as defined by aci 117, tolerances for concrete construction and materials, are shown in the table. The default is a finish that meets conventional straightedge tolerances specified in aci 117. Tolerances for concrete construction tolerances for concrete.
Tolerances, according to the commentary to aci 117 are a means to establish. Materials that interface with or connect to concrete. Aci 11710 supersedes aci 11706 and was adopted march 1, 2010 and. Common us specifications, published by aci and astm, are. This specification provides standard tolerances for concrete construction and materials. Correlation between division 3 floor flatness ff and floor. Constraints on reinforcing bar modeling civil engineering. 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. Aci 11706 2006 specifications for tolerances for concrete construction and materials american concrete institute, farmington hills, mi. This is particularly critical when the embeds have very thick plates photo courtesy of bruce suprenant fig.
The contractor shall place the frp reinforcement within the tolerances as specified in aci 117. Aci 117, standard tolerances for concrete construction and materials. Aci 117 06 specifications for tolerances for concrete construction and materials and commentary mycivil. Material tolerances are in section 2, including the location tolerance for reinforcing bars, which varies depending on the thickness of the concrete member. Specification for tolerances for concrete construction and materials. Constructability of embedded steel plates in castinplace.
Specification for tolerances for concrete construction and materials aci 117 10 and commentary aci 117r10. This variation can usually be in either of two directions and so can be regarded as positive or negative. Tolerances for concrete foundation construction as per aci 117m10 1. In most cases, it is best to refer to industry standard tolerances or other industry documents when they exist. Specification for tolerances for concrete construction and materials aci 11710 and commentary aci 117r10.
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