PERMANENT FORM OF CONCRETE WORK

PURPOSE:To easily assemble forms without cutting thereof even if how much of area the wall is, by assembling a plurality of plates having whole number times of length of the basic module. CONSTITUTION:Plates 1 having various sizes of width are prepared. The effective size L1 is made to be whole number times of length of the pitch (a) in the basic module of concrete columns, beams, etc. At both endside faces, a tongue 3A and a groove 3B are formed to have a male-female relation. A plurality of plates 1 provided with the tongue 3A having the same shape at both endside faces are also prepared. And further, a plurality of plates 1 are prepared to nave true tongue 3A at one side and a groove containing the tongue 3A, at the protrusion 2 of the other end. These plates 1 are assembled by making use of the tongue 3A, the groove 3B, and other grooves to form a permanent form. Since the effective size I1 is whole number times of the pitch of columns and beams, the permanent form can be surely connected to the columns and beams.