| 摘要 |
The instant invention provides stay in place molds for the construction of concrete structures comprising two boards or panels held together by a series of holding units that are fastened only to the interior surfaces of the cement panels by fastening means that are kept inside of the width of said panels. The holding units are selectively distributed at the internal cavity of the molds and are designed by a main cylindrical body having at least two internal ring units inside and two supporting plates at each one of the extremes of the main cylindrical body. The external, flat surface of the plates is permanently fastened only to the internal surface of the cement boards, thus forming strong stay in place construction molds having smooth external surfaces. |
