Published online by Cambridge University Press: 15 December 2014
We calculate the almost sure dimension for a general class of random affine code tree fractals in $\mathbb{R}^{d}$. The result is based on a probabilistic version of the Falconer–Sloan condition
$C(s)$ introduced in Falconer and Sloan [Continuity of subadditive pressure for self-affine sets. Real Anal. Exchange 34 (2009), 413–427]. We verify that, in general, systems having a small number of maps do not satisfy condition
$C(s)$. However, there exists a natural number
$n$ such that for typical systems the family of all iterates up to level
$n$ satisfies condition
$C(s)$.