at various desired heights supporting planks which provide the working surface at outside corners one bracket hooks into the side of another at right angles to provide a scaffold in both directions from the corner using but one vertical channel channels are left in place and covered up as the siding is applied application_number US 73510876 A description referring to fig1 and 2 a channel 4 is shown with a pair of flanges 8 a web 6 and a rib 10 protruding from the web 6 the channel 4 is formed from metal sheet 0 02 to 0 0625 inches 0 5 to 1 6 mm thick so that it will fit over a vertical member of the wood frame 26 consisting of a pair of studs 27 about 3 inches 76 mm thick overall the flanges 8 extend along the sides of the member 26 far enough to permit fastening the channel 4 to the member 26 a nail 30 is shown as one method of fastening and other means for fastening will be evident to one skilled in wood framing the rib 10 forms a recess 17 between itself and the member 26 a plurality of slots 16 in the face of the rib 10 provide locations where scaffold platforms may be supported the web 6 provides a support and fastening area for a sheathing 28 the projection of the rib 10 from the web 6 does not ordinarily exceed 0 75 inches 19 mm in order that the rib 10 does not protrude beyond the flush surface of regular thickness of the sheathing 28 a nail 32 fastens the.