104-322 - Permitted obstructions LAST AMENDED 12/6/2023 The obstructions set forth in Section 33-42, other than the rooftop equipment permitted pursuant to Section 104-321, as well as the following obstructions, may penetrate the applicable maximum #building# height and the applicable maximum height for rooftop equipment set forth in Appendix B of this Chapter, and may also penetrate the #sky exposure plane# set forth in Section 104-321 (Rooftop equipment). Within 50 feet of the #upper street wall#, the width of such obstructions shall be limited in total to 10 percent of the #aggregate width of street walls# of a #building#, per #street# frontage, at any level above the maximum level of rooftop equipment as set forth in Section 104-321. Beyond 50 feet from the #upper street wall#, the permitted obstructions may occupy an area not to exceed 30 percent of the #building# coverage at the ground level. Where portions of the #upper street wall# are located at different distances from the #street line# or #mandatory widened sidewalk line#, whichever is applicable, the portion used to establish such reference line shall be the portion that occupies the greatest area of such #upper street wall#. However, in no event shall such obstructions be located within 10 feet of the #upper street wall#. (a) Antennae and structural support thereto; (b) Pipes and supporting structures; (c) Railings.