§ 153.24 WIND PRESSURE.
   Every billboard shall be firmly and solidly constructed so as to be able to bear a wind pressure of at least 30 pounds per square foot of area; provided that billboards which are placed upon roofs must be so constructed as to be able to withstand a lateral wind pressure of 40 pounds per square foot of area.
('70 Code, § 11.8.4) Penalty, see § 153.99