The inventions disclosed herein relate to frame assemblies for gas barbecue grills which incorporate structures for preventing a consumer from storing replacement fuel tanks on the grill, in order to minimize fire and tipping hazards. Because it is known that many consumers never install or even remove prior art tank blockers, the tank blocker of the present invention is adapted to serve as a function of the grill (in addition to the function of blocking a tank) or to support a component of the grill. The preferred embodiment of the tank blocker described herein is adapted to support a component of the grease management system, namely the grease drip pan. Consequently, it is believed that consumers will be forced to install or will be prevented from removing the tank blocker, lest the grease management system become inoperable (or function improperly), causing grease to spill onto the cart.