Abstract: The invention relates to a parapet or railing assembly for building works and the like. The railing assembly comprises a hand rail and an intermediate rail connected together by cross bars to form a rigid railing frame. Posts include hooks for hanging the railing frame to the posts. The cross-bars are secured at the ends of the rails to constitute the rigid railing frame with the rails. The inner width of the hooks formed between the free end portions and the pole is greater than twice the width of the rails, whereby two overlapping frames can be hanged to a same post, even if the posts are not aligned.