Manufacture of construction elements - has abutments yielding vertically against spring load to form folds

摘要

The construction elements comprise two parallel nailable plates interconnected by corrugated metallic web sheets extending edgewise between them and have teeth at their edges embedded in the plates. They are made by placing the bottom plate in a movable frame having displaceable abutments connected to clamping means. The web sheets are placed in positions so as to be clamped at their extremities by the clamping means, the extremities of longitudinal sheets being pinched in folds of transverse end sheets. Also, interlocking deformations are punched in the adjoining webs. The clamping means are moved for stretching the sheets, the upper plate is placed on top, and web sheets and plates are brought into correct relative positions by corresponding positioning of the abutments. In addition longitudinal web sheets extending along edges of the element are supported externally between clamping points by spring-loaded rulers connected to abutments so as to ensure correct spacing from the plate edges.