Equipment and machinery which have precise tolerances for alignment or require uniform support cannot be placed directly on finished concrete surfaces. Both the concrete surface and the machine base have irregularities which result in alignment difficulties and bearing load concentrations. For this reason, machine bases or soleplates are aligned and levelled by shimming or other means and the resulting space between the machine base and the foundation is filled with a load transfer material. The load transfer materials most frequently used are hydraulic cement and epoxy grouts.
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