The employer shall ensure at a construction site of a building or construction work that,-
(a) building workers do not stand directly over jacking equipment while stressing of concrete girders and beams is being done;
(b) a pre- stressed concrete unit is not handled except at points on such unit and by the devices specified for such work by the manufacturer of such devices;
(c) during transport, pre-stressed concrete girders or concrete beams are kept upright by bracing or other effective means:
(d) anchor fittings for pre-tensioned strands of pre-stressed concrete girders or concrete beams are kept in a safe condition in accordance with the instructions of manufacturer of such anchor fittings;
(e) building workers do not stand behind jacks or in line with tensioning elements and jacking equipment during tensioning operations of pre-stressed concrete girders or concrete beams; and
(f) building workers do not cut wires of pre-stressed concrete girders or concrete beams under tension before such concrete used for such girders or beams is sufficiently hardened.