ࡱ> ac`_ vbjbjzyzy EV6b6bd8$C10 ( !!!0000000$s2)5d0"!!""0 0&&&"  /&"0&&6|,. _W\#j.0/10C1.6#f68.6.!"!&!"!!!00c%<!!!C1""""6!!!!!!!!!B P: SECTION 083114 DRYWALL CEILING ACCESS DOORS GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. SUMMARY Section includes factory-molded, drywall ceiling access door fabrications for interior ceiling applications. Related Requirements: Section092216 "Non-Structural Metal Framing" for steel framing, blocking, and bracing supporting drywall ceiling access doors. Section09 29 00 "Gypsum Board" for tapping and bedding access doors into gypsum board ceilings. SUBMITTALS Product Data: For each type of product. Include construction details, material descriptions, weights, dimensions of individual components and profiles, and finishes. Samples: For each door face material, at least 8 by 8 inches (203 by 203 mm) in size, in specified finish. Product Schedule: Provide complete access door and frame schedule, including types, locations, sizes, and other data pertinent to installation. Coordination Drawings: Reflected ceiling plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved: Ceiling suspension assembly members. Method of attaching hangers to glass-fiber-reinforced plaster fabrications and to building structure. Ceiling-mounted items including lighting fixtures, diffusers, grilles, speakers, sprinklers, access panels, moldings, and other fixtures. FIELD CONDITIONS Environmental Conditions: Do not deliver or install drywall ceiling access panel fabrications until building is enclosed, wet work is complete, and HVAC system is operating and continuously maintaining temperature and relative humidity at levels intended for building occupants. PRODUCTS ACCESS DOORS Manufacturers: Subject to compliance with requirements, provide products by one of the following: InterSource Specialties Co. (ISC). Karp Associates, Inc. Larsen's Manufacturing Company. Nystrom, Inc. Substitutions: Under provisions of Section 01 25 00. Size: [9-inch By 9-inch (228 mm by 228 mm)][12-inch By 12-inch (304 mm by 304 mm)][16-inch By 16-inch (406 mm by 406 mm)][18-inch By 18-inch (457 mm by 457 mm)][24-inch By 24-inch (609 mm by 609 mm)][As scheduled on Drawings]. MATERIALS: Glass Reinforced Gypsum (G.R.G.) units shall be prefabricated with high density gypsum, completely free of both asbestos and resin, reinforced with continuous filament random glass-fiber mat. Chopped strand fiber reinforcing is not permitted. No additives are allowed under any circumstances. These include: polymers, retarders, accelerators, etc. The architect or his representative shall have access to the manufacturing facilities, either prior to contract award or thereafter, to inspect or verify compliance with these specifications. FABRICATION Tolerances: Dimensional all directions +/- 1/8" +/- 3.2mm Thickness skin +/- 1/16" / - 0" +/- 1.6mm Thickness - total unit +/- 1/8" +/- 3.2mm Warpage or bowing +/- 1/6" per foot +/- 1.6mm per 304.8mm Physical Properties: Shell Thickness 1/8" to 3/16" 3.2mm to 4.8mm Weight (depending on reinforcing) 1 - 2 lbs/sq.ft 4.9 to 9.8kg/m2 Density 110 lbs/ft3 1 750 kg/m3 Ultimate Tensile Strength 1200 - 1400 p.s.i. 8275.9 - 9655 kPa Mod. of Elasticity in Tension 2.7 - .8 x 106 p.s.i. 26200 Mpa Mod. of Elasticity in Flexure 2.1 - 2.2 x 105 p.s.i 1516.8 Mpa Impact Strength 8.0 - 8.8 ft.lbs./in. 2 55.2 to 60.7 kPa Hardness - Rockwell M72 M72 Impact Strength 8.0 - 8.8 ft.lbs./in. 2 55.2 to 60.7 kPa Instron Failure Test (built in hanger) 288 lbs. (min.) 131 kg. (min.) Max. length of mouldings 4'-0" 1220 mm Flame Spread, Smoke Index & Fuel Contribution (A.S.T.M. E84-80) - 0 AUXILIARY MATERIALS Adhesives: As recommended by manufacturer's written instructions and as follows: Adhesive shall have VOC content of 50g/L or less when calculated according to 40CFR59, SubpartD (EPA Method24). Steel Drill Screws: Of sufficient length and size to securely fasten glass-fiber-reinforced plaster fabrications to framing members, and as follows: Screws complying with ASTMC1002 for fastening glass-fiber-reinforced plaster fabrications to steel members less than 0.033 inch (0.84 mm) thick. EXECUTION EXAMINATION Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work. Proceed with installation only after unsatisfactory conditions have been corrected. INSTALLATION Units shall be lifted carefully with suitable devices and installed plumb and level. Fasten units with screws (through the face or from the back), bolting or welding as shown on the shop drawings. Where units are suspended, use as a minimum, the suspension points indicated on the shop drawings. Butt joints are to be glued together. Use joint-treatment materials to finish glass-fiber-reinforced plaster fabrications to produce surfaces ready to receive primers and paint finishes specified in Section099100 "Painting." Finish joints between units, and countersunk fastener heads to comply with ASTMC840 for Level4 and to match surface texture of units. INSPECT /ADJUST Repair hollows, voids, scratches, and other surface imperfections on units. Adjust doors, after installation, for proper operation END OF SECTION 08 31 14 FOR MDACC USE ONLY. DELETE THIS PAGE BEFORE ISSUING DOCUMENTS. document revision history IssueDateRevision DescriptionAuthor20190301Original IssuanceRev. 1.Rev. 2Rev. 3 Rev. 4 Rev. 5      MD ANDERSON Project No. XXXXXXMD ANDERSON PROJECT NAMEA/E Name Issue Description A/E Project No.Month 00, 0000 鶹ӳ DRYWALL CEILING ACCESS DOORsMD Anderson Cancer Center08 31 14 mS 20190301 PAGE 5 of  NUMPAGES 5 -.6 + F N q r { . / V 9 : > ? 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