Washer assembly and arcuate threaded fastener

In combination a washer assembly and a threaded fastener, the threaded fastener having a longitudinal axis and to engage a concrete element, said assembly including:

• a first washer portion having a first washer portion aperture through which the threaded fastener is to pass, and a first washer portion surface at least substantially surrounding said first washer portion aperture;
• and
• a second washer portion, said second washer portion having a second washer portion aperture through which the fastener is to pass, the second washer portion having a second washer portion surface at least substantially surrounding the aperture of the second portion and being positioned to abut the surface of the first washer portion and to be urged into contact therewith upon tensioning of the fastener;
• and
• wherein the surface of said second washer portion extends beyond the aperture of said first washer portion when the surfaces abut, the aperture of said first washer portion is dimensioned to provide for relative movement between the portions with the apertures aligned to provide for the insertion of the threaded fastener therethrough, and first and second washer portion surfaces have co-operating projections and recesses that inhibit relative movement between the first and second washer portions when the threaded fastener is tensioned urging the surface of said second washer portion against the surface of said first washer portion:
• and
• the threaded fastener includes an arcuate surface to engage said second washer portion adjacent the aperture thereof, with the longitudinal axis of the threaded fastener being angularly displaceable relative to a desired axis.