Abstract: The shaft on which the awning web may be rolled up is mounted in a housing with a substantially cylindrical inner cavity having a slot along its length for passage of the web. C-shaped brackets, open in the region of the slot, can be slid onto the housing, with notches locking on ridges of the housing to prevent relative rotation, and these brackets may be clamped on wall-mounted bases at an adjustable angle by means of clamping shells affixed to the mounting bases. The extension arms linked to the bottom slat have their inner ends mounted on the forward portions of two of the brackets and these arms fold up against the housing as the bottom slat is pulled up against the housing when the awning is retracted.