Precast concrete wall panels bear on eighteen-inch square grout pads spaced at six feet on center maximum and on each side of panel openings. Grout pads extend a minimum of three inches from each face of the panel and are widened as required where panel thickness exceeds twelve inches. High-density plastic shims are provided on grout pads as required prior to crane releasing support. Concrete grout below the panel is vibrated to obtain continuous bearing prior to erecting the roof structure. A single grout pad centered on a panel joint is prohibited.
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