a pivotable safety gate having a pair of spaced apart parallel support frames which each have a distal end and a proximal end . the frames each have a support stanchion which is disposed adjacent the proximal end of the frame . the stanchions support a pivotable pair of gates . when one gate is down , the other gate is up . this gate assembly is utilizable at mezzanine floors where security and safety at edges of those floors are important . the gates prevent accidents and improper entry into areas which should be off limits to passage .