Abstract: Disclosed is an improved mounting bracket, for use with a window frame having a channel formed therein, the channel having a substantially T-shaped profile formed by a central slot defined in the window frame surface and a base disposed beneath the frame surface to which the slot extends and which is bisected thereby. The bracket is of the type having: a bracket body fastened, in use, to the frame of a structure adjacent a window opening to secure said window frame in said opening; and a pair of opposed lugs rigidly connected to the body and which are frictionally engaged in the base in use. The improvement comprises a further pair of opposed lugs rigidly connected to the body to provide a transport position for the bracket wherein the further pair of opposed lugs are rigidly, frictional engaged in the base and the body extends substantially lengthwise of the frame.