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METAL DOORS & FRAMES Section 08100 15-1207 C. Anchors: Provide at 2'-0" max. spacing, min. 16 ga. (0.053 in., 1.3 mm) x 2" wide to securely fasten frames to wall construction involved (wire anchors not acceptable); anchor bottom of frame within 2 inches of floor to wood framing or concrete curb (where occurs) with expansion anchors, both sides. Provide minimum 2 anchors at head of frames over 2'- 6" wide, and minimum 4 anchors per door jamb. Anchors shall provide stiffness and rigidity to keep frames square, in accurate position without twisting, buckling or warping. Position one jamb anchor above top butt reinforcement and one jamb anchor below bottom butt reinforcement. Anchors for labeled frames shall conform to UL requirements. Anchor types: a. New wall (wood framing): Wood stud anchors; 16 ga. (0.053 in., 1.3 mm), 2" wide steel anchor straps, securely welded inside each jamb at interior side(s). Continuous steel nailing flange at exterior side (no corner cutout at head/jamb intersection - flange to run continuous around corner). b. New wall (masonry/concrete): T -Strap anchors, 16 ga. (0.053 in., 1.3 mm), 2" x 10", corrugated and perforated, spot welded to back of jamb. Use adjustable style anchor where indicated. 2. All anchors to be UL approved for use on labeled frames. D. Preparation for Hardware: Factory prepare and reinforce door frames for approved finish hardware. Make cutouts and mortises for mortise hardware. Provide 7 ga. (0.167 in., 4.2 mm) steel reinforcement for hinges, 12 ga. (0.093 in., 2.3 mm) for lock strikes and closers, and 14 ga. (0.067 in., 1.7 mm) for surface applied hardware. 1. Provide reinforcement at head of frames for surface mounted closers at all doors whether or not closers are indicated. 2. Punch lock jamb of frames; install rubber door silencers, 3 at single doors and 4 at each pair of doors. For pairs of doors, locate door silencers at head, two for each door. Omit silencers at tabled doors. 3. Provide steel housing closures for hardware mortise to prevent intrusion of plaster, mortar or concrete. 4. Perform drilling and tapping for mortise hardware at factory to templates furnished by hardware vendor. Drilling and tapping for surface applied hardware will be done by hardware installer. 5. Provide full height, % inch deep x width of rabbet, polystyrene insulation at back of frames which will be fully grouted in-place using mortar type grout only and where continuous hinges are scheduled to be installed. Insulation is intended to act as a concrete block-out for future field drilling or tapping. E. Moisture Proofing/Sound Deadening Coating: For all exterior frames and frames anchored to masonry walls; coat all inside (concealed) faces of pressed metal frames with fibered water based, asphalt emulsion similar to autobody undercoating. Apply over shop primer 1/8 inch thick and thoroughly dry before handling. F. Special Frames: 16 ga. (0.053 in., 1.3 mm) with integral stop formed to cross section profile indicated. Provide muntins, mullions, and impose sections required, removable glazing stops or molding secured with tamper -proof oval head self -tapping screws set in countersunk holes at 12 inches o.c. Weld corners of frame, grind smooth on exposed frames. Structure shall be adequate to withstand 25 lbs/sf wind load normal to glass surface. 1.1