[SUBMITTAL INFORMATION]

DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS

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SECTION 102213

WIRE MESH PARTITIONS

(Edited from DeCA June 2017 Design Criteria)

PART 1 - GENERAL

1.1  SUMMARY

  1. Section Includes:
  2. Standard-duty, interior partitions.

1.2  DEFINITIONS

  1. Terms below shall be as defined in ASTME2016.
  2. Intermediate Crimp: Wires pass over one and under the next adjacent wire in both directions, with wires crimped before weaving and with extra crimps between the intersections.
  3. Lock Crimp: Deep crimps at points of intersection that lock wires securely in place.

1.3  PERFORMANCE REQUIREMENTS

  1. Seismic Performance:
  2. Provide wire mesh partition assemblies capable of resisting the effects of earthquake motions.
  3. Refer to Division 01 Section Summary of Work for seismic-load design criteria.
  4. Determine seismic loads using the appropriate exposure coefficient for the wire mesh partition assemblies.

1.4  SUBMITTALS

  1. Product Data:
  2. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for wire mesh items.
  3. Shop Drawings:
  4. Include plans, elevations, sections, details, and attachments to other work necessary for fabrication and installation.
  5. For installed products indicated to comply with design loads, include structural analysis data signed and sealed by the qualified professional engineer responsible for their preparation.
  6. Maintenance Data:
  7. For wire mesh unit hardware to include in maintenance manuals.
  8. Submittal List:

Reference Submittal Item Quantity Action

1.4A Product Data X R

1.4B Shop Drawings X R

1.4C Maintenance Data X I

X Submit quantity specified in Division 01 Section Administrative Requirements.

R Review each submittal, mark to indicate action taken, and return.

I Submittal is for information or record purposes only. No action will be taken.

1.5  QUALITY ASSURANCE

  1. Installer Qualifications:
  2. An employer of workers trained and approved by manufacturer.
  3. Installer's responsibilities include fabricating and installing wire mesh items and providing professional engineering services needed to assume engineering responsibility.
  4. Engineering Responsibility: Preparation of data for wire mesh items, including Shop Drawings, based on testing and engineering analysis of manufacturer's standard units in assemblies similar to those indicated for this Project.
  5. Source Limitations:
  6. Obtain wire mesh items through one source from a single manufacturer.
  7. Welding:
  8. Qualify procedures and personnel according to the following:
  9. AWSD1.1, "Structural Welding Code-Steel."

1.6  PROJECT CONDITIONS

  1. Field Measurements:
  2. Verify actual locations of construction contiguous with wire mesh items by field measurements before fabrication and indicate measurements on Shop Drawings.

1.7  DELIVERY, STORAGE, AND HANDLING

  1. General:
  2. Deliver wire mesh items palleted or crated to provide protection during transit and Project-site storage. Use vented plastic.
  3. Inventory wire mesh partition door hardware on receipt and provide secure lockup for wire mesh partition door hardware delivered to Project site.
  4. Tag each item or package separately with identification and include basic installation instructions with each item or package.

1.8  COORDINATION

  1. Coordinate installation of anchorages for wire mesh items supported or anchored to permanent construction. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.

PART 2 - PRODUCTS

2.1  MANUFACTURERS

  1. Basis-of-Design Products:
  2. To establish the significant qualities related to type, function, dimension, inservice performance, physical properties, appearance, and other characteristics for purposes of evaluating comparable products of other manufacturers, a specific manufacturer's product is named and accompanied by the words "basis of design," including make or model number or other designation. Subject to compliance with requirements, provide either the named products or equal products.
  3. Basis-of-Design Products: Acorn Wire & Iron Works, Inc., No. 130AL.

2.2  MATERIALS

  1. Steel Wire: ASTM A 510.
  2. Steel Plates, Channels, Angles, and Bars: ASTMA36/A36M.
  3. Steel Pipe: ASTMA53/A53M.
  4. Schedule40, unless another weight is indicated or required by structural loads.
  5. Square Steel Tubing:
  6. Cold-formed structural-steel tubing, ASTMA500.
  7. Metallic-Coated Steel Sheet: ASTMA653/A653M.
  8. Commercial Steel (CS), TypeB; with G60 zinc (galvanized) or A60 zinc-iron-alloy (galvannealed) coating designation.
  9. Panel-to-Panel Fasteners:
  10. Manufacturer's standard steel bolts.
  11. Post installed Expansion Anchors in Concrete:
  12. With capability to sustain, without failure, load imposed within factors of safety indicated, as determined by testing per ASTME488, conducted by a qualified independent testing agency.
  13. Corrosion Protection: Carbon-steel components zinc plated to comply with ASTMB633, ClassFe/Zn 5 for ClassSC1 service condition (mild).
  14. For Post installed Anchors in Concrete: Capability to sustain, without failure, a load equal to four times the loads imposed.
  15. For Post installed Anchors in Grouted Masonry Units: Capability to sustain, without failure, a load equal to six times the loads imposed.
  16. Power-Actuated Fasteners in Concrete:
  17. Fastener system of type suitable for application indicated and fabricated from corrosion-resistant materials; with clips or other accessory devices for attaching hangers of type indicated, and with capability to sustain, without failure, a load equal to 10 times that imposed by wire mesh construction, as determined by testing per ASTME1190, conducted by a qualified testing and inspecting agency.
  18. Seismic Bracing:
  19. Angles with legs not less than 1-1/4 inch wide, formed from 0.04-inch- thick, metallic-coated steel sheet; with bolted connections and 1/4-inch- diameter bolts.

2.3  STANDARD-DUTY WIRE MESH PARTITIONS

  1. Mesh:
  2. 0.135-inch- diameter, intermediate-crimp steel wire woven into 1-1/2-inch diamond mesh.
  3. Vertical Panel Framing:
  4. 1-1/4-by-5/8-by-0.0966-inch cold-rolled, C-shaped steel channels with 1/4-inch- diameter bolt holes spaced not more than 18 inches o.c. along center of framing.
  5. Horizontal Panel Framing:
  6. 1-by-1/2-by-1/8-inch cold-rolled steel channels.
  7. Horizontal Panel Stiffeners:
  8. 1-by-1/2-by-1/8-inch cold-rolled steel channels with wire woven through, or two 1-by-3/8-by-1/8-inch cold-rolled steel channels bolted or riveted toe to toe through mesh.
  9. Top Capping Bars:
  10. 2-1/4-by-1-inch cold-rolled steel channels.
  11. Posts for 90-Degree Corners:
  12. 1-1/4-by-1-1/4-by-1/8-inch steel angles with 1/4-inch- diameter bolt holes aligning with bolt holes in vertical framing; with floor anchor clips.
  13. Adjustable Corner Posts:
  14. Two, manufacturer's standard steel pipe or tubing posts connected by steel hinges at 36 inches o.c. attached to posts; with 1/4-inch- diameter bolt holes aligning with bolt holes in vertical framing.
  15. Line Posts:
  16. 3-inch-by-4.1-lb or 3-1/2-by-1-1/4-by-0.1265-inch steel channels; with 5-by-18-by-1/4-inch steel base plates punched for attachment to floor.
  17. Floor Shoes:
  18. Steel, cast iron, or cast aluminum, 2 inches high; sized to suit vertical framing, drilled for attachment to floor, and with set screws for leveling adjustment.
  19. Swinging Doors:
  20. Fabricated from same mesh as partitions, with framing fabricated from 1-1/4-by-1/2-by-1/8-inch steel channels or C-channels, banded with 1-1/4-by-1/8-inch flat steel bar cover plates on 3 sides, and with 1/8-inch- thick angle strike bar and cover on strike jamb.
  21. Hinges: Full-surface type, 3-by-3-inch steel, 1-1/2 pairs per door; bolted, riveted, or welded to door and jamb framing.
  22. Cylinder Lock: Mortise type with cylinder specified in Division08 Section Door Hardware; operated by key outside and lever inside.
  23. Inactive Leaf Hardware: Cane bolt at bottom and chain bolt at top.
  24. Door Frames: Fabricated from same size and shape as vertical panel framing for the mesh panels.
  25. Accessories:
  26. Wall Clips: Manufacturer's standard, cold-rolled steel sheet; allowing up to 1 inch of adjustment.
  27. Finishes for interior locations.
  28. Hot-dip galvanized.

2.4  FABRICATION

  1. General:
  2. Fabricate wire mesh items from components of sizes not less than those indicated. Use larger-size components as recommended by wire mesh item manufacturer. Provide bolts, hardware, and accessories as required for complete installation.
  3. Fabricate wire mesh items to be readily disassembled.
  4. Welding: Weld corner joints of framing and leave as applied.
  5. Standard- Duty Wire Mesh Partitions:
  6. Fabricate wire mesh partitions with cutouts for pipes, ducts, beams, and other items indicated. Finish edges of cutouts to provide a neat, protective edge.
  7. Mesh: Securely clinch mesh to framing.
  8. Framing: Fabricate framing with mortise and tenon corner construction.
  9. Provide horizontal stiffeners as indicated or, if not indicated, as required by panel height and as recommended by wire mesh partition manufacturer. Weld horizontal stiffeners to vertical framing.
  10. Fabricate partition and door framing with slotted holes for connecting adjacent panels.
  11. Fabricate wire mesh partitions with 3 inches of clear space between finished floor and bottom horizontal framing.
  12. Doors: Align bottom of door with bottom of adjacent panels.
  13. For doors that do not extend full height of partition, provide transom over door, fabricated from same mesh and framing as partition panels.
  14. Hardware Preparation: Mortise, reinforce, drill, and tap doors and framing as required to install hardware.

2.5  FINISHES

  1. General:
  2. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.
  3. Finish wire mesh items after assembly.
  4. Appearance of Finished Work: Variations in appearance of abutting or adjacent pieces are acceptable if they are within one-half of the range of approved Samples. Noticeable variations in the same piece are not acceptable. Variations in appearance of other components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast.
  5. Galvanizing:
  6. Hot-dip galvanize wire mesh items to comply with ASTMA123/A123M. Hot-dip galvanize hardware for hot-dip galvanized wire mesh items to comply with ASTMA153/A153M.

PART 3 - EXECUTION

3.1  EXAMINATION

  1. General:
  2. Examine areas, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of work.
  3. Examine floors for suitable conditions where wire mesh items will be installed.
  4. Examine walls and ceilings to which wire mesh items will be attached for properly located blocking, grounds, and other solid backing for attachment of support fasteners.
  5. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2  ERECTION

  1. Wire Mesh Partitions:
  2. Anchor wire mesh partitions to floor with 3/8-inch- diameter, post installed expansion anchors at 12 inches o.c. through floor shoes located at each post and corner. Adjust wire mesh partition posts in floor shoes to achieve level and plumb installation.
  3. Anchors may be set with power-actuated fasteners instead of post installed expansion anchors if so indicated on Shop Drawings.
  4. Anchor wire mesh partitions to walls at 12 inches o.c. through back corner panel framing and as follows:
  5. For hollow masonry anchorage, use toggle bolts.
  6. For steel-framed gypsum board assemblies, fasten brackets directly to steel framing or concealed reinforcements using self-tapping screws of size and type required to support structural loads.
  7. Secure top capping bars to top framing channels with 1/4-inch- diameter "U" bolts spaced not more than 28 inches o.c.
  8. Provide line posts at locations indicated or, if not indicated, as follows:
  9. For partitions that are more than 12 feet high, located between each panel.
  10. Provide seismic supports and bracing as indicated or, if not indicated, as recommended by manufacturer and as required for stability, extending and fastening members to supporting structure.
  11. Where standard-width wire mesh partition panels do not fill entire length of run, provide adjustable filler panels to fill openings.
  12. Install doors complete with door hardware.
  13. Bolt accessories to wire mesh partition framing.

3.3  ADJUSTING AND CLEANING

  1. Adjusting:
  2. Adjust doors to operate easily without binding.
  3. Check and readjust operating hardware items just before final inspection. Leave work in complete and proper operating condition. Remove and replace defective work including doors and framing that are warped, bowed, or otherwise unacceptable.
  4. Cleaning:
  5. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas; repair galvanizing to comply with ASTMA780.

END OF SECTION

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WIRE MESH PARTITIONS

102213 - 2