Ideal shade coverage: upto 54" tables Fiberglass ribs bend and flex in windy directions. FAQ: What is the ideal shade coverage? The optimal shade coverage is up to 54" tables. What is the benefit of the fiberglass ribs? The fiberglass ribs will bend and flex in windy conditions or if umbrella were to strike the ground. How long is the umbrella warranted for? 2 years from date of consumer purchase (excluding wind damage) Will the tilt rotate as the sun moves across the sky? By pushing in the push button coupling and rotating your umbrella 180 degrees, the tilt angle will change directions by 180 degrees. How do I engage the auto tilt mechanism? By continually rotating the crank handle clockwise until the umbrella tilts.. Base not included Base not included.