Abstract: Anchor systems for joining structural members include a resiliently deformable member such as a dished washer to permit easy visual determination that the anchor system is correctly tightened in place. Post-tensioned anchor systems of the kind disclosed are particularly suitable for joining structural members, such as end-to-end columns. One of a number of mold parts, including a threaded tapered mold part, forms a threaded tapered hole in a poured concrete structural member for use with anchors, and passages permitting the introduction of a resinous securing agent may be formed in cooperation with the threaded tapered holes. Highway barriers can be formed with such holes and joined with the resin filling the holes and space between barrier ends.