The invention relates to an element (1) to be arranged in a corner of a parallelepipedic cage-like structure where a bottom or a top plane of the structure meets two walls of the structure extending perpendicularly to this plane and to each other. The element (1) comprises a bottom portion (2), outer wall portions (6, 7), inner wall portions (9, 10) and wall members (16, 17) so as to receive components of said structure in the form of first and second board-like members, such as wooden planks, therebetween with wide sides of these board-like members bearing on each other. The inner wall portions (9, 10) each comprises a spring member (90, 100) configured to bear onto and urge a said second board-like member to press a said first board-like member against an outer wall portion (6, 7), so as to clamp these board-like members between a couple of inner (9, 10) and outer (6, 7) wall portions. The invention also relates to a cage-like structure provided with such elements (1) at said corners thereof.