초록 ▼

Method and apparatus for pre-casting box-like reinforced concrete modules on assembly line. Apparatus includes pair of movable interior forms for defining the interior surfaces of side walls and ceilings whereby one interior mould at a time can be removed when concrete is in semi-cured condition. Me

Method and apparatus for pre-casting box-like reinforced concrete modules on assembly line. Apparatus includes pair of movable interior forms for defining the interior surfaces of side walls and ceilings whereby one interior mould at a time can be removed when concrete is in semi-cured condition. Method includes casting floor with short upstanding side wall portion to serve as guide for interior forms when moving forms onto floor slab. Method also includes use of integral multiples of four serially arranged casting beds on which various procedures for forming modules proceed simultaneously and progressively.

대표청구항 ▼

A method for forming, on a casting bed, a precast concrete box like building module of the type having a floor, a pair of spaced apart side walls extending up from said floor, and a roof extending between the upper ends of said side walls; said method comprising the steps of: (a) integrally casting

A method for forming, on a casting bed, a precast concrete box like building module of the type having a floor, a pair of spaced apart side walls extending up from said floor, and a roof extending between the upper ends of said side walls; said method comprising the steps of: (a) integrally casting simultaneously a concrete floor slab and the lower portions of the concrete side walls; (b) moving onto the floor slab after the concrete has at least partially cured a pair of interior forms each of which includes a vertical plate for defining the interior surface of one of said side walls and a horizontal plate at the upper end of the vertical plate for defining a portion only of the interior surface of said roof, each of said interior forms having been moved to bring its vertical plate into alignment with the interior surface of one of said lower portions of said side walls; (c) pouring the remainder of said concrete side walls and roof; (d) permitting the wall and roof concrete to cure sufficiently to render self-supporting a portion only of the roof concrete; (e) removing one of said interior forms to leave said portion only of the roof concrete unsupported; (f) shoring said unsupported portion of said roof concrete; and (g) then removing the other of said pair of interior forms from within said module, whereby said pair of interior forms has been removed from said module after a curing time less than the curing time required to render the entire roof self-supporting.