3205.1 The anchors on the building to which the belt shall be fastened shall be installed in the side frames of the window or in the mullions at a point not less than forty-two inches (42 in.) or more than fifty-one inches (51 in.) above the window sill.

3205.2 All window frames to which anchors are attached shall be in sound condition and shall be securely fastened in place.

SOURCE: Sections 11-2528 and 11-2529, effective September 1, 1958, ch. 25, 5 DCR 28 (August 11, 1958); 11B DCRR, Special Edition.