Series SQ, SR, SC Frames Standard Frames with Equal Rabbets for Masonry, Wood or Metal Stud Walls Design flexibility utilizing frames with made-to-order profiles and dimensions. Within tooling limits, Ceco frames can be specified in made-to-order dimensions for depth, throat, face, rabbet, soffit, or backbend to include a caulking groove, shadow box, splayed trim line, splayed top, stepped rabbet and others. Series SQ frames have precision die-cut corners with positive locking tabs to assure rigid assembly connections. Available in hundreds of profiles and dimensions in either knock-down or set-up & welded. For masonry, wood or metal studs wall, installed either to cap or butt the wall. Three or four piece door frames, Borrowed Lites, Side Lites, or Transom Frames. Available in non-stock sizes: 3" thru 14" depth. Equal rabbets~ 1-15/16" for 1-3/4' doors 16, 14, and 12 gauge steel Cold rolled, A60 or G90 galvanized High recycled steel content for LEED points up to 58.8% Fire label: Up to three hours(UL10B and UL10C)~ Underwriters Laboratories (Applied or Embossed) ~ Warnock Hersey (Applied or Embossed) ~ Factory Manual(Applied Only) Up to four hours~ BS476 Part 22 Sizes Available: Cased Openings ~ 3" to 14" depth Single Rabbett ~ 16 and 14 gauge, 3" to 14" 12 gage, 3-3/8" to 14" Double rabbet~ 16 and 14 gauge, 4-5/8" to 14" 12 gauge, 5-1/4" to 14" Hinge preparations: ANSI A156.7, 4-1/2". Strike preparations: ANSI 4-7/8" universal A115.1 and A115.2 A wide variety of anchoring options can be specified for masonry, wood or metal stud construction.