DIVISION 6 - WOOD AND PLASTICS. Section General Discussion. Introduction

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1 Section General Discussion This General Discussion Section contains material which is important to successful millwork, wood framing and wood structural installations, in construction projects. The issues are fundamental to the basic design of the project, and the long term success of those elements of the project, as well as the fabrication and installation process. General Carpentry and Wood Design Although not a material of choice for exposed conditions in our desert climate, wood is used extensively as a building material. When used in University projects and in structural conditions requiring structural design and/or calculations, Consultant shall use a professional structural engineer currently registered in Arizona. Installations shall be by contractors and tradesmen skilled in framing and carpentry work. Architectural Woodwork / Custom Casework Because the University anticipates a longer than average building life and higher than average use and abuse, durable, high quality architectural woodwork (millwork) is essential to the long term success and serviceability of any project. Section Architectural Woodwork / Custom Casework specifies current Standards of the American Woodworking Institute (AWI) but modifies the standard to omit the use of certain materials in certain conditions and in certain portions of the work. Although used extensively industry wide, in the experience of the University, these materials have proven unsatisfactory and must be specifically excluded from the specifications. Laboratory Casework These Standards differentiate between Architectural Woodwork / Custom Casework and Laboratory Casework because of the specialized nature and use of the product. Laboratory Casework shall be specified separately in Division 12 Furnishings. Additional standards are cited and specific pre-approved fabricators and manufacturers are listed. Also, it may be necessary to include additional sections in Division 11 Equipment to cover acrylic counter tops, laboratory bench tops and surfaces for acid and chemical resistance and for Laboratory Fixtures. End of Section Page /97

2 Section Rough Carpentry No Discussion Submittals shall not be required if drawings sufficiently describe products unless special attention is desired by the Consultant, or the Project Manager. Submittals requiring structural design or calculations shall be sealed by a professional structural engineer currently registered in Arizona. Indicate and coordinate on plans and specifications all required solid blocking at all wall hung fixtures, door stops, cabinets, shelves and similar items. Roof sheathing shall be a minimum of 5/8 thick, Structural 1 Exterior Plywood over trusses or joists at 16 or 24 spacing. At 24 spacing ply-clips shall be required. Fire Retardant Treated Lumber and plywood shall be specified and provided as required by Code and construction type. Installations shall be by contractors and tradesmen skilled in carpentry work. End of Section Page /97

3 Section Pre-Fabricated Structural Wood No Discussion Submittals shall be required for all prefabricated wood trusses including shop drawings, erection drawings, bracing and calculation. Submittals requiring structural design or calculations shall be sealed by a professional structural engineer currently registered in Arizona. Trusses with metal webs and laminated timber top and bottom chord members are preferred, and joists, other than dimension lumber, are preferred to be the plywood web type with laminated wood top and bottom chord members. Gang-Nail type trusses are discouraged. Glue Laminated structural members shall conform to the standards of the American Institute of Timber Construction (AITC). Designer must take care to differentiate between appearance and concealed grades of structural members. Installations shall be by contractors and tradesmen skilled in carpentry work. End of Section Page /97

4 Section Finish Carpentry Consideration shall be given to the use of wood base, in lieu of the usual rubber base, in high use areas where equipment might impact and damage walls. Also consider chair rails for wall protection where appropriate. Finish Carpentry and Interior Architectural woodwork shall be fabricated to current Standards of the American Woodworking Institute (AWI). In most circumstances the requirements of Finish Carpentry may be combined with Section Architectural Woodwork rather than in a separate section. All Architectural Woodwork shall be Custom grade (or better as may be required) according to the American Woodwork Institute (AWI) and subject to the following: No particle board or particle board core plywood may be used in any part of the work. Plywood shall be industrial quality. Installations shall be by skilled tradesmen. In the cases where fabricator and installer are not one and the same, product and project guarantee shall not be compromised. End of Section Page /97

5 Section Architectural Woodwork / Custom Casework These standards differentiate between Architectural Woodwork/Custom Casework and Laboratory Casework because of the specialized nature and use of the product. Laboratory Casework shall be specified separately in Division 12 - Furnishings. Reference the following standards as applicable: Architectural Woodwork Institute (AWI) Quality Standards, current edition. ANSI/BHMA A156.9 Cabinet Hardware. NEMA LD3 High Pressure Decorative Laminate. In most circumstances the requirements of Section Finish Carpentry may be combined with this section rather than in a separate section. All Architectural Woodwork shall be Custom grade according to the American Woodwork Institute (AWI) and subject to the following additional criteria: No particle board or particle board core plywood may be used in any part of the work except laminate tops discussed below, and shall be specifically excluded. (Laminate tops as discussed below excepted.) Plywood shall be all hardwood veneer core. High density formaldehyde free wood fiber board may be considered for use in lieu of plywood for laminate tops in dry areas on the Main Campus if approved by the Project Manager. Water resistant phenolic resin particle board may similarly be considered for wet areas if approved by the Project Manager. Millwork shall be opaque or transparent finish rotary cut uniform color light birch hardwood (unless otherwise approved by the Project Manager). Architect shall specify finish and call for sample submittal for review and approval. Interior of millwork shall receive opaque or transparent finish to match exterior. Plastic Laminate Clad Millwork may be used only if approved by the Project Manager. Doors and drawers shall be fully clad including inside faces of doors. Minimum grades for plastic laminates shall be as follows (NEMA / ISO / Inch Thickness): For horizontal surfaces use HW62/HCS/.062 or GP50/HGS/.050 and for vertical surfaces use BK50/BGS/.050. Do not specify post forming grades of laminates. Specify color or series if known. Approved manufacturers of plastic laminate are: Wilson Art Formica Nevamar Pionite Approved manufacturers of Solid Surfacing Material Tops are: Corian Formica Surell Pionite ChemGuard 2 Pages /02

6 Hardware shall be indicated in a schedule in this section or in Section 08710, Finish Hardware. If in Section 08710, reference to that section. Drawer glides shall be heavy duty rated. Hinges shall be concealed type full metal with no plastic parts. Hardware for adjustable shelves on walls shall be Heavy duty type equal to the K-V standard and bracket system. Approved hardware manufacturers are: McKinney K&V Blum Stanley Gras Plastic laminate tops and back splashes are to be fabricated using ¾ plywood unless approved otherwise. Edges and joints shall be tight, glued and sealed. Post formed tops and splashes are not allowed. In those areas where sinks are applied to the underside of counter tops the tops shall be fabricated from 7 ply birch plywood (3/4 minimum) with an A surface one side. Do not use water based laminate glues on any counter top. Fastening devices and their attachment shall be submitted for approval prior to installation. Drywall screws will not be allowed for the attachment and installation of millwork. Fabricate case bodies with stop dadoes if transparent finish. All Custom grade millwork concealed surfaces shall be treated at the shop with spray or brush application of 50% Pentacholorphenol solution in a 1:10 mixture with deodorized spray base. In the field all concealed scribed and cut surfaces shall receive a brush application of the same material. Drawers shall be lock shouldered or multiple dovetailed and have applied fronts. Bodies shall be hardwood or 7 ply plywood. Bottoms shall be hardwood panel product or masonite hardboard full or stop dadoed. Exposed surfaces shall be hardwood. All drawers shall ride on full suspension drawer glides, not wood keels. Shelves shall be edged plywood or solid lumber. Janitor and storage room shelving shall be AWI Economy grade except no particle board is allowed. Indicate requirements for utility provisions which must be coordinated by the fabricator. Plastic laminate application shall be specified as follows: Apply side edging first, then top surface, with top surface overlapping side edging. Installations shall be by skilled tradesmen. In the cases where fabricator and installer are not one and the same, product and project guarantee shall not be compromised. End of Section Pages /02