Abstract: To enable a scaffolding structure to serve horizontally curved structures such as storage tanks, a connection is provided to allow horizontally adjacent scaffold transom element to be relatively inclined to one another in a horizonal plane. The joint includes connection means including a wedge to engage a socket afforded by a scaffold upright and such connection means is pivotally mounted on a scaffold cross member, such as a transom element, which itself affords a socket for the connection of a further cross member, such as a ledger element. Alternatively, the connection means may be pivotally mounted on a part provided with two such sockets for the releasable connection of a transom element and a ledger element.