Anchor Point Engineering P/L provides 2 very well known vertical fall arrest systems, the Sala "Lad-Saf" and the Sayfa "Arresta" systems. Both systems can be attached to existing ladders or supplied at the time of the ladder installation.
Using a vertical vall arrest system eliminates the necesity of ladder cages. Being attached at all times gives the user peace of mind when accessing or egressing a roof via a ladder.