| 摘要 |
PURPOSE: A prefabricated form for the construction of a drain trench is provided to assembly a form precisely and rapidly and to correspond to the weight of concrete of the rear surface of the form. CONSTITUTION: A prefabricated form for the construction of a drain trench comprises following steps. A pair of spit bodies are symmetrically pressed to the outer surface of joint projections. A fastening molding(20) is coupled with the joint projection of the spit body. A side plate(12) is formed at one end of a bottom(11) of the spit body and a joint projection is projected upward from the spit body. The spit body has an L-shape. A joint molding has a joint groove. |
