The proposed scheme for beam containment in the Hall D line \cite{ref:keller} places a permanent magnet in the photon beam following the tagger magnet as a fail-safe mechanism to ensure that the primary electron beam does not accidentally get dumped into the experimental area. Here we give a more quantitative estimate of the space needed in the tagger building to implement this beam containment proposal. We conclude that the tagger building must extend 13 m from the front of one permanent magnet to deflect the primary beam by 20 cm into a concrete absorber. This distance is sufficient to separate the electron from the photon beam pipe so that it can be contained downstream of the tagger building.
