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American Concrete Institute (ACI) 117 -"Specifications for Tolerances for Concrete Construction and Materials [PDF]

The American Concrete Institute (ACI) have a standard code of standard tolerances for construction materials which is ACI 117-10, "Specifications for Tolerances for Concrete Construction and Materials".
The publication as per ACI, " is a means to establish permissible variation in dimension and location, giving both the designer and the contractor limits within which the work needs to be performed". 






As the name implies, the tolerances specified in ACI 117 are standards or usual tolerances that apply to various types and uses of concrete construction. It is provided based on the usual needs, common construction techniques and practices.

Features of ACI-117 in Construction

  • The tolerances specified in ACI-117 is applicable for typical concrete construction procedure for both exposed and architectural concrete.
  • The code is not applicable for specialized structures like nuclear reactors and containment vessels, bins, prestressed circular structures, and single-family residential construction. It also does not apply to precast concrete or to shotcrete.
  • The code comprises 15 sections in total. The different sections in ACI-117 and their content are mentioned in the table -1 below.

  • SECTION 1

    General requirements

    SECTION 2

    Materials

    SECTION 3

    Foundations

    SECTION 4

    Cast-in-place concrete for buildings

    SECTION 5

    Cast-in-place concrete at the interface with precast concrete (except tilt-up concrete

    SECTION 6

    Masonry

    SECTION 7

    Cast-in-place, vertically slipformed building elements

    SECTION 8

    Mass concrete

    SECTION 9

    Canal lining

    SECTION 10

    Monolithic water-conveying tunnels, siphons, conduits, and spillways

    SECTION 11

    Cast-in-place bridges

    SECTION 12

    Exterior pavements and sidewalks

    SECTION 13

    Chimneys and cooling towers

    SECTION 14

    Cast-in-place non-reinforced pipe

    SECTION 15

    Tilt-up concrete


  • Before the commencement of the work, a series of preconstruction tolerance coordination meetings shall be scheduled and held.  This meetings must include contractors, sub-contractors, material suppliers and other key parties.
  • The meetings conducted will help the parties to discuss and identify tolerance questions, conflicts in working with materials or work assembled in the field by the contractor.
Download ACI-117 Code Here>> 
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