Abstract: A support frame system for a deck is disclosed, and comprises a deck support structure that may include a plurality of elongate joist components, at least one cross member component for supporting the joist components, a plurality of post components for supporting the at least one cross member component, and an edge component for extending along ends of the plurality of joist components. The support frame system may comprise a stair support structure that may include an elongated carriage component for orienting in an inclined orientation, a tread support component for mounting on the carriage component and extending outwardly from an upward side of the carriage component for positioning in a substantially horizontal orientation, and a riser support component for mounting between the carriage component and the tread support component for positioning in a substantially vertical orientation.