FLOOR BLOCKOUT DRAWINGS » CENTER HUNG DOORS Drawing # STANDARD THRESHOLD AUTOCAD | JPEG | PDF #FB-C101 STONE/TILE/TERRAZZO THRESHOLD AUTOCAD | JPEG | PDF #FB-C102 FLUSH MOUNTED AUTOCAD | JPEG | PDF #FB-C103 NOTES: For standard bottom arm types used with Opcon Converters, see "Bottom Arms" section of Opcon website. Contact Opcon for information on alternate bottom arms that may be adapted to the Opcon spindle system. For door leaf preparation of standard bottom arms (excluding bottom slide arms) see each individual manufacturer's website for the latest template drawings. Use Opcon drawings herein for bottom slide arm installations with Opcon Converters.