A 777-200 tail will scrape at 10-11 degrees pitch attitude if the main gear is still on the ground. Typical target pitch attitude for a takeoff or goaround is 15 degrees. As long as you have the correct airspeed and do not rotate too quickly then there should be no risk of a tail strike.
An N reg 777 scraped the tail on takeoff from R/W 27R at LHR a few years ago. A lot of into wind aileron was applied and the resulting spoiler drag and a slightly faster than normal rotation (3.4 degrees per second instead of 2.5 degrees per second) resulted in the scrape. I believe there was also a slight loss of airspeed due fluctuating wind during rotation.The aircraft dumped fuel and returned to LHR.
Last edited by suninmyeyes; 6th Apr 2012 at 22:20.