Tie the grill to the deck or patio. Using nylon rope that has been approved to hold at least 100 lbs., tie the grill legs and cross bars to pieces of the deck frame. Many grills are set next to wood railings which have posts.
Place sand bags on the cross bars of the grill. Sand bags are a great way to secure the grill by adding weight on top of the frame. The excess weight will help stop the grill from rolling or sliding if extreme wind kicks up.
Wedge the wheels of the grill. Using small wedge blocks, wedge each of the wheels around the grill to secure it in place.