shown. Drill holes starting 600 mm (24 inches) above bottom of frame and 600 mm (24 inches) o.c. to top of jamb and at top of jamb. Provide pipe spacers at holes welded to channel. 5. Where closure plates are shown, continuously weld them to the channel flanges. 6. Weld continuous 19 x 19 x 3 mm ( inch) thick steel angles to the interior side of each channel leg at the head and jambs to form a caulking groove. 7. Prepare frame for installation of hardware specified in Section 08 71 00, DOOR HARDWARE. a. Cut a slot in the lock jamb to receive the lock bolt. b. Where shown use continuous solid steel bar stops at perimeter of frame, weld or secure with countersunk machine screws at not more than 450 mm (18 inches) on center. C. Frames for Breech Opening: 1. Fabricate from steel channels, or combination of steel plates and angles to size and contour shown. 2. Weld strap anchors on back of frame at not over 600 mm (2 feet) on centers for concrete or masonry openings. D. Frames for Lead Lined Doors: 1. Obtain accurate dimensions and templates from suppliers of lead lined doors, finish hardware, and hollow steel door frames. 2. Fabricate as shown for use in connection with lead lined doors. 3. Deliver assembled frames with removable shipping spreaders at top and bottom. 4. Extend angles at jambs from floor to structural slab above. At floors of interstitial spaces, terminate jamb sections and provide anchors as shown. 5. Continuously weld plates and reinforcements to frame members and head members of angle frames between jambs. 6. Weld strap anchors, not over 600 mm (24 inches) on centers, to the back of angles for embedment in masonry or concrete unless shown otherwise. 7. Type 15 Door Frames: a. Structural steel angle frames with plate or bar full height to heads. Extend reinforcing at hinge cutouts two inches beyond cutout. b. Fabricate top anchorage to beam side at mid height.
shown. Drill holes starting 600 mm (24 inches) above bottom of frame and 600 mm (24 inches) o.c. to top of jamb and at top of jamb. Provide pipe spacers at holes welded to channel. 5. Where closure plates are shown, continuously weld them to the channel flanges. 6. Weld continuous 19 x 19 x 3 mm ( inch) thick steel angles to the interior side of each channel leg at the head and jambs to form a caulking groove. 7. Prepare frame for installation of hardware specified in Section 08 71 00, DOOR HARDWARE. a. Cut a slot in the lock jamb to receive the lock bolt. b. Where shown use continuous solid steel bar stops at perimeter of frame, weld or secure with countersunk machine screws at not more than 450 mm (18 inches) on center. C. Frames for Breech Opening: 1. Fabricate from steel channels, or combination of steel plates and angles to size and contour shown. 2. Weld strap anchors on back of frame at not over 600 mm (2 feet) on centers for concrete or masonry openings. D. Frames for Lead Lined Doors: 1. Obtain accurate dimensions and templates from suppliers of lead lined doors, finish hardware, and hollow steel door frames. 2. Fabricate as shown for use in connection with lead lined doors. 3. Deliver assembled frames with removable shipping spreaders at top and bottom. 4. Extend angles at jambs from floor to structural slab above. At floors of interstitial spaces, terminate jamb sections and provide anchors as shown. 5. Continuously weld plates and reinforcements to frame members and head members of angle frames between jambs. 6. Weld strap anchors, not over 600 mm (24 inches) on centers, to the back of angles for embedment in masonry or concrete unless shown otherwise. 7. Type 15 Door Frames: a. Structural steel angle frames with plate or bar full height to heads. Extend reinforcing at hinge cutouts two inches beyond cutout. b. Fabricate top anchorage to beam side at mid height.