.. ah ... how high you are depends on a bunch of variables and just which limit is the limiting case for the particular takeoff.
(a) ASDR - hopefully no height at all
(b) TOD1 - probably a bit above 35/15 ft
(c) TOD2 - moderately above 35/15 ft
(d) TOR1/2 - depends on the C/W declared and the aircraft
and so forth ...
The actual height at the end of TORA will vary a bit and, unless you have some flight test data, you can only make educated estimates .. as a first approximation, half the screen for the 1:1 rules.