Abstract: A safety net assembly for covering and uncovering a substantially rectangular open pit includes a safety net with a rope edging and a guide cable that is mounted about the perimeter of the pit, the guide cable defining a pair of track along which the safety net is slidably moved to its opened and closed positions. A plurality of closable links are attached to two sides and one end of the safety net and slidably mounted to the guide cable at two sides and one end of the pit. A plurality of snap rings are attached to the other end of the safety net and releasably attached to the guide cable at the other end of the pit. The links permit the safety net to be drawn open and closed, and the snap rings secure the safety net over the pit.