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   PART 1 - GENERAL

    01 SECTION INCLUDES

    A. Steel hollow metal doors and frames.

    02 REFERENCE STANDARDS

    A. ASTM A366 - Steel, Carbon, Cold-Rolled Sheet, Commercial Quality.

    B. ASTM E90 - Method for Laboratory Measurement of Airborne-Sound Transmission Loss of Building Partitions.

    C. ASTM E152 - Methods of Fire Tests of Door Assemblies.

    D. ASTM E413 - Classification for Determination of Sound Transmission Class.

    E. DHI - Door Hardware Institute: The Installation of Commercial Steel Doors and Steel Frames, Insulated Steel Doors in Wood Frames and Builder's Hardware.

    F. NFPA 80 - Fire Doors and Windows.

    G. NFPA 252 - Fire Tests for Door Assemblies.

    H. SDI-100 - Standard Steel Doors and Frames.

    I. SDI-105 - Recommended Erection Instructions for Steel Frames.

    J. UL 10B - Fire Tests of Door Assemblies.

    1.02 SUBMITTALS

    A. Submit the following in accordance with Section 01340.

    B. Product Data: Submit manufacturer's technical data substantiating that products comply with requirements of this section.

    C. Shop Drawings: Indicate details and gages of frames, elevations of doors and frames, conditions at openings, details of construction, location and installation requirements of finish hardware and reinforcements, and details of joints and connections. Show type of anchorage and accessory items.

    1. Provide schedule of doors and frames using same reference numbers for details and openings as those on contract drawings.

    2. Indicate cutouts for glazing and louvers where required in doors.

    3. Indicate fire-resistance ratings where applicable.

    D. Certification: For fire-rated assemblies, submit manufacturer's certification indicating that each type of fire-rated doors and frames are fabricated to meet or exceed the requirements of the Contract Documents.

    E. Coordinate the work of this section with the requirements for doors specified in other sections of Division 8.

    1. Indicate these requirements on shop drawings.

    1.03 DELIVERY, STORAGE, AND HANDLING

    A. Deliver metal doors and frames cartoned or crated to provide protection during transit and job storage. Provide additional sealed plastic wrapping for factory-finished doors. Comply with Section 01610.

    B. Inspect metal doors and frames upon delivery for damage. Minor damages may be repaired provided refinished items are equal in all respects to new work and acceptable to Architect. Remove and replace refinished units not acceptable to Architect.

    C. Store doors and frames at building site under cover. Place units on minimum 4" high wood blocking. Avoid use of non-vented plastic or canvas shelters which could create humidity chamber. If cardboard wrapper on door becomes wet, remove carton immediately. Provide 1/4" spaces between stacked doors to allow air circulation. Comply with Section 01620.

   PART 2 - PRODUCTS

    03 MANUFACTURER

    A. The following manufacturers are acceptable only after compliance with requirements of this section.

    1. Amweld/Div. American Welding and Manufacturing Company

    2. Bymoco Metal Fabricators, Incorporated

    3. Ceco Corporation

    4. Steelcraft/Div. American Standard Company

    2.02 STEEL DOOR FRAMES

    A. Type: Welded-unit construction of cold-rolled steel conforming to ASTM A366, free of defects, warp and buckle.

    1. Molded members shall be clean-cut, straight and true.

    2. Corner Joints: Mitered in true alignment and welded continuously on inside of frame.

    3. Face-welding and notching of stops at head and jamb intersections is not acceptable.

    4. Inserts, Bolts and Fasteners: Manufacturer's standard units concealed where practical, hot-dip galvanize items to be built into exterior walls, ASTM A153.

    5. Welds on Exposed Surfaces: Shall be flush and smooth.

    6. Form double-return flanges on all frames, except for existing openings as shown.

    7. For frames which wrap around wall openings, form flanges to fit wall thickness.

    8. Provide trim angles to be installed at heads of exterior frames.

    9. Spreader Bars: Each door frame shall be complete with spreader bar welded to bottom of frame.

    B. Gage/Finish:

    1. Frames: 16 gage hot-dipped galvanized steel with ASTM A525/G60 zinc coating; bonderized and coated with zinc-chromate rust-inhibitive primer, baked on.

    C. Provisions in Frames for Hardware: Prepare frames at factory for installation of hardware.

    1. Mortise, reinforce, drill and tap frames to templates to receive mortised template hinges, lock strikes, flush bolts, and overhead door closers.

    2. Reinforcing Plates: 10 gage for mortised hardware and lock strikes, 12 gage for surface-applied hardware.

    3. Cover Boxes: 26 gage, welded to frame in back of hardware cutouts.

    4. Silencers: Provide three rubber silencers on lock side of single doors and one silencer for each leaf in heads of double-door frames.

    D. Anchors:

    1. Galvanized metal clip angle shall be welded to bottom of each jamb member for anchoring to floor construction.

    2. For Masonry Walls: Three 18 gage galvanized steel anchors at each jamb up to 7'-6" height; one additional anchor required for each 18 inches or fraction thereof over 7'-6" height.

    2.03 STEEL DOORS

    A. Type: 1-3/4" thick, flush type, seamless, with two face sheets of 18 gage cold-rolled sheet steel conforming to ASTM A366. Vertical stiffeners shall be of channel-shaped steel on nominal 6" spacings, welded to both face sheets.

    1. Top and Bottom of Doors: Close with 16 gage steel channels. Exterior doors to have flush tops.

    2. Continuously fill vertical edge joints between face sheets to vertical edge channels, grind smooth, free of exposed seams.

    3. Fill interior doors with spun mineral wool to deaden metallic sound.

    4. At pairs of fire rated and smoke doors, provide factory-installed steel astragals. Coordinate with Section 08710.

    5. At pairs of doors in exterior walls, provide factory-installed steel astragals. Coordinate with Section 08710.

    6. Bottom of Doors: 5/8" maximum gap is required between bottom of doors and concrete floor slab. Undercuts greater than 5/8" are not acceptable.

    7. Sizes: As scheduled.

    B. Finish:

    1. Doors: Hot-dipped galvanized steel with ASTM A525/G60 zinc coating, bonderized and coated with zinc-chromate rust-inhibitive primer, baked-on.

    C. Provisions in Doors for Hardware:

    1. Mortise, reinforce, drill and tap to receive template hinges, cylindrical or mortise locks as required, flush bolts and closers.

    2. Provide special reinforcing for bored-type locks and latches.

    3. Reinforcing plates, kick and mop plates, and armor plates.

    2.04 FIRE RATED STEEL DOORS AND FRAMES

    A. Fire-Rated Door Assemblies: Where fire-rated door assemblies are indicated or required, provide fire-rated door and frame assemblies that comply with NFPA 80 "Standard for Fire Doors and Windows", which have been tested, listed and labeled in accordance with ASTM E152 "Standard Methods of Fire Tests of Door Assemblies" by a nationally recognized independent testing and inspection agency acceptable to authorities having jurisdiction.

    B. Each fire rated door and frame shall bear Underwriter's Laboratories label.

    C. The labels on UL approved doors and frames must be a permanent type.

    1. "Stickon" type labels are not acceptable.

    D. Doors designated as "20-minute" or greater rating require UL labeled frames.

    2.05 STEEL THERMAL DOORS AND FRAMES

    A. Type: At exterior locations and elsewhere shown or scheduled, provide doors fabricated as thermal insulating door and frame assemblies, and tested in accordance with ASTM C236 requirements.

    1. Unless otherwise indicated, provide thermal-rated assemblies with U-Factor of 0.24 Btu/(hr-ft - F) or better.

    2.06 PREPARATION FOR GLAZING

    A. Where doors and frames have glazed openings, provide openings with integral stop on one side.

    1. Provide 18 gage steel removable glazing stop for other side.

    2. Form corners of removable stops with butted hairline joints.

    3. Prepare removable stops for installation with countersunk sheet metal screws spaced at not more than 8 inches on centers.

    4. Door lite frames and stops shall be flush type to avoid possible conflict with panic devices.

    5. Provide 1/4" thick wire glass where door glazing is required.

   PART 3 - EXECUTION

    04 FRAME INSTALLATION

    A. General:

    1. Install frames, and accessories in accordance with final shop drawings and SDI-105 "Recommended Erection Instructions For Steel Frames", unless otherwise indicated.

    2. Except for frames located at in-place construction place frames prior to construction of enclosing walls and ceilings.

    3. Set frames accurately in position, plumbed, aligned, and braced securely until permanent anchors are set.

    4. After wall construction is completed, remove temporary braces and spreaders leaving surfaces smooth and undamaged.

    B. At in-place concrete or masonry construction, secure frames to adjacent construction with machine screws and masonry anchorage devices.

    C. In Masonry Partitions:

    1. Install frames in close coordination with masonry work.

    2. Provide 1/4" space around perimeter of both sides of frames to receive sealing compound.

    3. Anchor frames to floor and temporarily brace to maintain vertical position. Leave spreaders in place until masonry is installed.

    4. Frames shall be grouted into masonry by the masonry trade.

    D. Install fire-rated frames in accordance with NFPA Standard No. 80.

    02 DOOR INSTALLATION

    A. Install doors in accordance with approved shop drawings.

    B. Doors shall fit squarely with frames and operate properly.

    1. Except as otherwise indicated, door clearances shall be not more than 3/32" at jambs and heads, and 5/8" maximum at bottom between door and concrete floor slab.

    C. Install hardware without forcing, with proper clearances and alignment, so that operation is smooth and easy, free of binding and/or twisting.

    D. The installed fire-rated frame and door assemblies shall conform to NFPA Standard No. 80.

    E. Coordinate the work of this section with panic devices which cross over flush type door lite frames and stops.

    F. Coordinate installation of glass and glazing with Section 08800.

    03 ADJUST AND CLEAN

    A. Adjust doors and hardware for smooth and balanced door movement.

    B. Clean up hardware and adjacent surfaces upon completion. Do not use abrasives or liquid cleaners that will harm finishes.

    C. After installation, Contractor shall touch-up scratched and damaged surfaces.

    1. Dented or bent frames and doors shall be repaired as required with metal putty, sanded and primed with type of primer to match shop coating.

    2. Damaged units which cannot be repaired to meet Architect's approval shall be replaced with new units.

    END OF SECTION