BURIED MATERIAL UNIT, PRECAST CONCRETE PANEL AND METHOD OF MANUFACTURING THE CONCRETE PANEL, AND SLAB AND METHOD OF CONSTRUCTING THE SLAB

摘要

A buried material unit, wherein lightweight buried materials disposed at proper intervals in longitudinal and lateral directions are connected to each other through connection materials fitted across the upper parts and lower parts of the lightweight buried materials adjacent to each other, the lightweight buried materials in one area of the lightweight buried materials are formed in the same width and different height as and from the lightweight buried materials in the other area, and the upper side connection materials are installed at the same height as the lower ends of upper reinforcements and the lower side connection materials are installed at the same height as the upper ends of lower reinforcements.