Gypsum Mantel

Architectural Specifications

 1.0 GENERAL

 1.1 DESCRIPTION

    A. Fireplace mantels shall be Worthington plaster mantel according to design number_____________

    B. Plaster fabrications as indicated on the project drawings.

                   C. Provide all labor materials, equipment and related services for the complete installation of plaster fabrications in accordance with contract documents and requirements of authorities having jurisdiction.

1.2 SUBMITTALS

    A.  Submit under provisions of Section 01300.

B.   Shop Drawings:  For custom items, provide for approval drawings in AutoCAD format showing dimensions, layout, sections, and ornate details where applicable; include field measured dimensions of the spaces where items are to be installed, if critical to proper installation.

    C.  Samples:  For each custom “millwork” item specified, provide (1) - 12” long sample presenting actual product and pattern.

 1.3 DELIVERY, STORAGE, AND HANDLING

A.  Transport, lift, and handle units with care, avoiding excessive stress, impact, and preventing damage; use appropriate equipment and handling methods.

B.  Store products level in manufacturer's unopened packaging until ready for installation, in a clean dry area protected from weather, moisture, low temperatures, and damage.

 2.0 PRODUCTS

 2.1 MANUFACTURER

 Worthington Group Ltd

 6950 Phillips Highway

 Suite 20

 Jacksonville, FL 32216

 P. 800.872.1608/ F. 904.281.1488

 www.WorthingtonMillwork.com

 2.2 MATERIALS

A. Gypsum Fabrications:  High density gypsum reinforced with glass fibers, and/or metal reinforcing as required.

B.     Adhesive: Gypsum adhesive such as Sheetrock 90 as manufactured by US Gypsum Co. Bulldog PL Premium polyurethane adhesive as manufactured by LePage/Henkel may be used as an alternate adhesive.

   C.  Mechanical fasteners: Stainless steel screws

2.3 PHYSICAL MATERIAL PROPERTIES

      A.  Glass fiber content:  5 to 10% by weight.

      B.  Density:  70 to 130 lb/cu.ft.

         C.  Shell thickness: as required by design and indicated on drawings

         D.  Flame Spread Index: 0, when tested in accordance with ASTM E84-90.

         E. Compressive strength: 2,000 to 5,000 psi

         F.  Impact strength: 1,600 to 1,750 g*cm

 2.4 TOLERANCES

   A. Variation from dimensions indicated on drawings:  +/- 1/8”

   B. Variation from plane along edge or surface: +/- 1/16” per linear foot

 3.0 EXECUTION

 3.1 EXAMINATION

   A  Do not begin installation until substrates have been properly constructed; verify that substrates are plumb and true. If substrate preparation is the responsibility of another installer, notify architect and general contractor of unsatisfactory preparation before proceeding.

         B. Check field dimensions before beginning installation.  If dimensions vary out of tolerance range for proper installation, notify architect and general contractor. Work shall not proceed until all discrepancies are corrected.

 3.2 PREPARATION

   A. Clean surfaces thoroughly prior to installation.

   B. Prepare surfaces as required to achieve the best result for the substrate under the project conditions.

   C. Install supplementary temporary and permanent support and/or bracing as required for proper installation

 3.3 INSTALLATION

   A. Install in accordance with manufacturer's recommendations, plumb and true to line; shim where necessary.

   B. Coordinate work with related site work.

   C. Butter all bedding margins and butt joint ends with adhesive, such as  “Power Grab” as manufactured by Loctite/Henkel, or “Bulldog PL Premium” as manufactured by LePage/Henkel. Follow adhesive manufacturer’s instructions. Use shims to align joints if required.

3.4 PROTECTION

    A. Protect installed products until completion of project

    B. Touch-up, repair or replace damaged products before substantial completion.

 3.5 FINISHING

A. Comply with Section 09900 of specifications.

** NOTE TO SPECIFIER **

 a. Worthington plaster fabrications are finished products and should be treated as a gypsum product for surface finishes.

b. Plaster fabrications are intended for interior “dry” applications.

c. Worthington plaster fabrications are produced with a texture  and color that replicates the appearance of stone. Due to natural characteristics of the material and manufacturing process, variations in color shade and surface texture are normal

 3.6 WARRANTY

     A. One (1) year manufacturer’s warranty for all materials supplied, effective from date of receipt of material. Product will conform to samples and drawings approved by architect and/or general contractor. Any defects in workmanship will be correct or replaced at the discretion of the manufacturer at no cost. Defects developed as a result of other trades or site conditions are specifically excluded.

     B. Limitations: The noted general warranty is exclusive. All other warranties whether expressed or implied or arising by application of law, usage of trade, in the course of dealings or otherwise, are excluded. The only warranty is that expressed above. The manufacturer shall not be liable for any penalty or for any loss or damages associated with the removal or installation of its products or claims of third parties against the purchaser.