What are the opening limitations in a hollow-core system?Openings smaller than 12”x12” are generally installed in the field through a core drill process and if requiredthe corners are squared off with a saw. Hammer drilled holes smaller than 21⁄2” in diameter can be installed innearly any location within the system. The locations of these openings should be coordinated with the EnConDesign Department so the primary reinforcement can be avoided. Most often, the design team (Contractor,Engineer of Record – EOR, and Architect of Record – AOR) is given a set of rules to follow which makes forsimple trade coordination. Openings larger than 12” are added to the product in the plant and must followthe engineering and design requirements of the system. Larger openings can be accommodated though theuse of hangers where the adjacent slabs support other shorter slabs. All openings are normally considered“rough openings,” but a finished opening can also be provided if needed.
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