When it comes to avoiding wake turbulence, the various takeoff and landing scenarios are addressed--except taking off after a heavy aircraft lands. Here's the closest I've found, which deals with the large aircraft executing a low or missed approach: "Because vortices settle and move laterally near the ground, the vortex hazard may exist along the runway and in your flightpath after a large airplane has executed a low missed approach or a touch and go landing, particularly in light quartering wind conditions. The pilot should assure that an interval of at least 2 minutes has elapsed before takeoff or landing." Does the same advice apply? Or is there a safe rotation point, as with departing behind a larger departing aircraft? In other words, is wake turbulence an issue for the departing aircraft while it's still on the ground roll and not airborne?