The present invention relates to a mounting structure comprising a structural member having a first surface adapted to engage a support and at least one first flange extending outwardly from a second surface, wherein the first surface is distal from the first flange; and at least one securing member comprising at least one second flange extending outwardly from a surface of the securing member, wherein the securing member is operable to juxtapose with the structural member via the first surface, and engage with the structural member to secure a side of a panel between the first flange and the second flange. The present invention also relates to a mounting structure assembly and method of assembling the same.