Abstract: A constructive assembly is provided comprising separate assembly parts with side-projections and corresponding side-recesses. Moreover the assembly parts comprise cooperating recesses at their top for accommodating coupling elements for holding together assembled assembly parts.

Abstract: A building foundation form work arrangement in which a plurality of boxes 1 are located on a supporting level surface and are kept apart to leave channels 4 between the boxes 1, and spacers 22 engaging respective sides of each of the corners of the boxes 1 so as to hold these in position against substantial lateral dislodgement forces when concrete is poured into the channels 4.

Abstract: A leak-proof ceiling structure associated with a roof to define a protected space beneath the roof and to prevent any liquid which may leak through the roof from passing to the protected space. A pair of elongated longerons are suspended beneath the roof with each of the longerons spaced apart from the other with the second end of the longerons higher than the first end thereof. Elongated troughs are suspended between the pair of longerons for catching liquid that may leak from the roof.

Abstract: A sorter for grains, pulses and the like having a perforated sorting plate mounted on a frame and both longitudinally and laterally inclined with respect to the horizontal plane and adapted to be vibrated in the longitudinal direction while being intermittently lifted toward the upper side. The perforated sorting plate overlies an air chamber into which pressurized air is introduced by a blower through an air duct. The perforated sorting plate is provided with a corrugated upper surface to define a multiplicity of ribs oriented in the direction perpendicular to the direction of vibration of the sorting plate and in parallel rows at a pitch not less than the size of the material to be sorted. A set of discharge openings for receiving the sorted material is provided at the lower end of the perforated sorting plate where the ribs terminate.