Mobile structural unit molding and assembling apparatus includes a support portion, a raw material supplying portion, a molding portion, a unit transferring portion and a control portion. The support portion includes at least one base section with a wheeled carriage. The raw material supplying portion includes a plurality of reservoirs disposed on the base section. The molding portion includes at least one rotatable mold assembly disposed on the base section including at least two separable mold sections. A mixing chamber adjacent the mold assembly connects with raw material reservoirs through independent conduits. The unit transferring portion includes a tiltable unit positioning assembly selectively movable with respect to the molding portion. The control portion includes a programmable memory, a coordinator, sensors, actuators, a unit orienter and circuitry therefor. A continuous structural unit molding and assembling method includes the steps of flowing a freshly formed resin forming mixture over all surfaces of a mold cavity by multiaxis rotation to form a structural unit, conveying the unit not fully cured, orienting the unit in an inclined orientation, and assembling it with previously positioned units, and the resulting structure.