Abstract: A deck framing device relates to a clamp-based system that can be safely implemented without risk of damaging rails, banisters, or other such existing mounting structures. A set of clamps allows the apparatus to mount securely and removably atop a deck, especially the railing of a deck. The clamps may be adjustable to accommodate for different widths of railings or supports. A vertical post extends upwards from around each of the clamps. These vertical posts are connected by horizontal beams that are optimized for the support of various items, including, but not limited to, curtains, ornamental lighting fixtures, blankets, and more. In many versions, the horizontal beams may expand telescopically to allow for customizable length adjustment or may be cut down to an appropriate size and fit into hinged supports extending from the top portions of the vertical posts. Various threaded fasteners ensure that customization is both convenient and intuitive.