Abstract: A slat (116) is arranged to co-operate with substantially similar slats (117) for the construction of structures, primarily garden furniture. Each slat defines a substantially C-shaped cross section with a central element (501) and two longitudinal elements (502, 503) attached to the central element. Locking teeth (505) are applied to an external surface (504) of the central element, arranged to radially extend about a connecting hole (506). The connecting hole receives a spindle (507) arranged to securely hold the slats in position. With the spindle loosened, it is possible to re-configure the furniture for different purposes. However, with the spindle held tightly in place, the furniture becomes rigid and suitable for supporting body weight.