Don’t Flip Out. Place the burgers on the grill over direct heat to sear and caramelize the outside of the meat. After about 2 minutes, give the burger a quarter turn to produce the crosshatch grill marks. Alternatively, if using an infrared grill, keep the lid open and check the burgers after about 1 minute.
https://www.leaf.tv/articles/how-to-grill-a-perfect-burger/
And so it is with a ground beef patty as well. Once that realization was made, it was a quick step to discover that cooking a burger is just like cooking a roast on a small scale: to maximize the degree of medium rare center, you must first cook it in a low temperature oven (around 200 to 225°F).
http://aht.seriouseats.com/archives/2010/02/the-burger-lab-how-many-times-should-you-flip-a-burger-while-cooking.html
Prepare grill for direct cooking. Sprinkle both sides of the flank steak with salt and 1/2 teaspoon black pepper. Place the steak on the grill's grid. Grill steak, on a covered grill, over medium-hot coals 10 minutes for medium-rare or until desired doneness is reached, turning halfway through grilling time.
http://recipes.howstuffworks.com/tools-and-techniques/how-to-grill-food-cooking1.htm
Grill roast, on covered grill, over medium coals 1 hour to 1 hour 10 minutes or until thermometer registers 150 degrees F for medium-rare or until desired doneness is reached, adding 4 to 9 briquets to both sides of the fire after 45 minutes to maintain medium temperature of coals.
http://recipes.howstuffworks.com/tools-and-techniques/how-to-grill-food-cooking1.htm
TheKitchn.com suggests that after the burgers are flipped, grill them another 2 to 3 minutes for medium-rare, 3 to 4 minutes for medium or 5 to 6 minutes for well-done. The time frame on an infrared grill coud be a somewhat shorter. Of course, nobody wants to equate a delicious grilled burger to a foodborne illness.
https://www.leaf.tv/articles/how-to-grill-a-perfect-burger/
In this patty, the amount of dessicated, well-done meat on the top and bottom is limited to just about 3/16-inch around the outer edge—that's 40% less overcooked meat than the first one, and the burger cooked in just two-thirds of the time!
http://aht.seriouseats.com/archives/2010/02/the-burger-lab-how-many-times-should-you-flip-a-burger-while-cooking.html
4. Grill the Burgers: Grill the burgers for 2 minutes on each side, then move them to a lower-heat area of the grill. Cook another 2-3 minutes for medium-rare burgers, 3-4 minutes for medium, or 5-6 minutes for well-done burgers.
http://www.thekitchn.com/how-to-grill-really-juicy-burgers-cooking-lessons-from-the-kitchn-51194
If cooking on a charcoal grill, arrange coals to create a high heat and a low heat cooking zone. 2. Prepare the Ground Beef: While the grill is warming, prepare the burgers. Gently pat the ground beef into a log roughly 2 feet long on a clean baking sheet. Use your thumb to make a deep trough in the center.
http://www.thekitchn.com/how-to-grill-really-juicy-burgers-cooking-lessons-from-the-kitchn-51194
To grill meat loaf: 1  Prepare barbeque grill for direct cooking. 2  Shape meat loaf mixture into an oval loaf 1-1/2 inches thick, about 9 inches long and 5 inches wide. 3  Place loaf on preheated grid.  Grill meat loaf, on covered grill, over medium-hot coals 10 1  minutes. Carefully turn meat loaf over using 2 large spatulas.
http://recipes.howstuffworks.com/tools-and-techniques/how-to-grill-food-cooking1.htm
By allowing it to first cook in the oven, the exterior dessicates a bit, and goes into the skillet warm, greatly decreasing the amount of time it needs to achieve good coloring—from about 2 to 3 minutes per side to about 45 seconds per side— thus reducing the amount of overcooked meat under the surface.
http://aht.seriouseats.com/archives/2010/02/the-burger-lab-how-many-times-should-you-flip-a-burger-while-cooking.html
how long to grill a thick hamburger
A thick hamburger takes 2 to 3 minutes for medium-rare burgers, 3 to 4 minutes for medium, or 5 to 6 minutes for well-done burgers. A thick hamburger to grill 2-3 minutes for medium-rare burgers and 3-4 minutes for medium and 5-6 minutes for well-done burgers.