Rostrum and support structure for a rostrum

摘要: In a first aspect, rostrum support structure for comprises pair of frame units which are inclined towards one another, extending from floor contacting portions to points, truss members being provided downwardly and inwardly the linking member or other member, provide triangulated structure. second unit unit, latch fixing with respect in an extended position, comprising movable mounted on surface units, into out engagement surface, preferably by rotation, direction parallel planes decks substantially normal retraction direction.