Abstract: a beam-to-beam connection structure for a storage rack comprises: at least two beams, each of which is provided with axial guide rails, at either side surface of the axial guide rails is defined a flange, in the respectively beams are defined connecting grooves and locking grooves; a connecting member is provided with through holes and fixing holes correspondingly to the axial guide rails and the connecting grooves of the beams, so that screws are screwed through the fixing holes into the connecting grooves of the beam, the connecting member is formed with connecting portions employed to insert in the locking grooves of the beams.

Abstract: An adjustable rack structure comprises: a positioning board employed to be fixed a wall is provided on its surface with co-directional hook portion and looking flange; a support member is provided with a hook portion and an inserting portion employed to be positioned against in the hook portion and the looking flange, respectively, the supporting member further includes a supporting portion defined a notch; a rail structure axially provided with a positioning portion employed to be engaged in the notch of the support member; a cap assembled to an end of the rail structure. The position of the support member relative to the positioning board can be adjusted according to user's needs.