A support structure for staging, especially for group photographic purposes, comprises a pair of support members each including a base edge (15,16) and a raked staging-support edge (17,18), the support members being hingeably connected together about their staging-support edges (17,18) for angular movement between a closed position for transportation and storage and an open in use position, and means (22,23,24) for determining the angle between the support members in use. Two such structures may be assembled by mounting one on another with their rear edges adjacent, to increase the height of the staging.