ACI 117.1 R-14 Guide for Tolerance Compatibility in Concrete Construction. 4.1.2.2 Second. identify tolerances required by interfacing components that are inconsistent with the cast-in-place concrete tolerances specified by ACt 117. Some toterancs required for interfacing components cannot be achieved using standard cast-in-place concrete practices. The gap in tolerance compatibility between the concrete and interfacing components could require additional work or rework, such as grinding a floor slab or applying a leveling compound. Differences should he identified and an appropriate solution found. For example. ASCC Position Statement #6 (ASCC 2003), with reference to conflicting floor flatness tolerances, recommends providing an allowance in the contract documents for any necessary grinding or leveling to ensure toler- ance compatibility between the concrete and floor finishes. 4.1.2.3 Finally, to ensure the tolerance system is compatible, investigate how the identified tolerances combine and interact by evaluating various deviation scenarios. 4.1.3 U eneraiesol ui ions that create lolerance compatibility 4.1.3.1 Once tolerance conflicts are identified, select an appropriate mitigation strategy to address them. A variety of mitigation strategies for dealing with tolerance conflicts are used regularly. For example, common strategies to create tolerance compatihilit) include the use of filler materials such as caulk, floor leveling compounds, and grout; adjust- able structural connections; suitable clearances; and custom fabricating parts based on as-built dimensions of in-place construction. Successhul application of the specific solutions included in this guide is job-dependent. Strategies on which solutions are based, however, can be general iied to apply to any job. 4.1.3.2 Finding the best solution depends on the nature of the incompatibility, design flexibility, manufacturing processes, construction techniques, and the inspection process. in general. better solutions for creating tolerance compatibility in terms of safety, cost, schedule, and quality are generated through collaboration with project participants. General strategies can be as simple as a design modification of the connection or interface. [hey should be implemented during the design phase of a project, and some can also be implemented during the procurement. shop drawing, and field construction phases. In general, lower overall project costs are achieved by implementing mitigating strategies in the early stages of the project cycle.ACI 117.1 R pdf download.
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