A support device for a bundle of elongated members and a locking assembly for securing the same within the bundle are disclosed. The support device includes an elongated support adapted to be located between adjacent spaced rows of elongated members, wherein the elongated support having a first side and a second side, wherein the first side being arranged to be positioned adjacent one row of the spaced rows of elongated members and the second side being arranged to be positioned adjacent another row of the spaced rows of elongated members. The support device includes a plurality of support members spaced along the elongated support, wherein each support member have a first supporting assembly located on the first side for supporting one of the elongated members in the one row and a second supporting assembly located on the second side for supporting one of the elongated members in the other row. At least one locking assembly is provided for locking the support device between the adjacent rows of elongated members, wherein each of the at least one locking assembly being located on at least one of the first side and the second side between adjacent supporting assemblies.