An assembly comprises a corner block piece and a locating plate. The corner block piece has a node receiving cavity which includes an aperture configured to receive a locking pin. The locating plate includes at least one locking node. The locking node includes a spring-loaded locking pin configured to engage the aperture when the locking node is inserted in the node receiving cavity. The assembly facilitates construction of a portable staging system involving a platform, at least two support legs, and bracing.