The system, devices and method are for a cantilevered furniture (e.g., floating bed) installation including vertical frame reinforcements and frame brackets for securement to, or adjacent, a wall frame having top and bottom plates and vertically extending wall studs, and providing cantilevered support of a horizontally disposed frame. Horizontal frame supports or arms are coupled to support T-brackets which are installed where desired on the vertical frame reinforcements. The vertical frame reinforcements are secured where desired to the wall frame via top and bottom L-shaped frame brackets. The horizontal frame supports are longitudinally elongate and include support trusses extending and coupled therebetween to support an assembly (e.g., a bed assembly including at least a mattress with a platform or a box spring). For example, there may be six trusses for a parallel arrangement and eight trusses for a perpendicular arrangement.