Internal Tolerance Conflicts in Concrete Construction

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Title: Internal Tolerance Conflicts in Concrete Construction

Author(s): Bruce A. Suprenant and Ward R. Malisch

Publication: Concrete International

Volume: 33

Issue: 1

Appears on pages(s): 31-34

Keywords: international tolerances, construction, contractors, subcontractors

Date: 1/1/2011

Abstract:
Tolerances associated with layout, formwork elevation and alignment, reinforcement fabrication and placement, surface elevation and levelness can cause internal tolerance compatibility issues—conflicts within concrete construction itself. Coordination of the internal tolerances in ACI 117-101 is difficult even when a single concrete contractor controls the total work package, including layout. But these contractors can usually complete the work to the satisfaction of the Owner and Architect/Engineer because they control the total work package. When the work packages are separated, however, the construction manager or general contractor should be responsible for ensuring internal tolerance compatibility.