WPC4  
      2      B       P   Z             Courier 10cpi #| x              A~x 6X   @ 8 X@Canon BJ-200ex (LQ mode)             CB20LQMO.PRS x 
   @   ,hX@Courier 10cpi  2     V   @   Z          F   `    ? x x x h    Aox 6X   @ 8 X@Canon BJ-200ex (LQ mode)             CB20LQMO.PRS x 
   @   ,h  @ #| x           2         2                                      I. A. 1. a.(1)(a) i) a)                 1 .1  A. 1. a. 1) a)                                                                             X`	hp x (#%'0*,.8135@8:<H?A                    (	xX8xX 8"                      ,              mSection 09511  Page ,    = $ SECTION 09511

 ((      		      SUSPENDED ACOUSTICAL CEILINGS

                  1  PART 1 GENERAL

   ?   ((                 1.1   SECTION INCLUDES

   ? @  ((                  A.   Suspended metal grid ceiling system and perimeter trim.

   ?   ((                 B.   Acoustical tile.

   ? `	  ((               1.2   RELATED SECTIONS

   ? 
  ((                  A.   Section 16721 - Fire Alarm and Smoke Detection Systems: ((   Fire alarm components in ceiling system.

   ? H  ((               1.3   REFERENCES

   ?   ((                  A.  H ASTM C635 - Metal Suspension Systems for Acoustical Tile andLay-in Panel Ceilings.(#

   ? 0  ((                 B.  H ASTM C636 - Installation of Metal Ceiling Suspension Systemsfor Acoustical Tile and Lay-in Panels.(#

   ?   ((                 C.  H ASTM E1264 - Classification of Acoustical Ceiling Products.(#

   ?   ((                 D.  H Ceilings and Interior Systems Contractors Association(CISCA) - Acoustical Ceilings:  Use and Practice.(#

   ? p  ((                 E.  H UL - Fire Resistance Directory and Building MaterialDirectory.(#

   ?   ((               1.4   SYSTEM DESCRIPTION

   ? X  ((                  A.  H Suspension system to rigidly secure acoustical ceilingsystem including integral mechanical and electricalcomponents with maximum deflection of 1/360.(#

   ? x  ((               1.5   SUBMITTALS

   ?    ((                  A.   Submit under provisions of General Conditions.

   ? !  ((                 B.  H Shop Drawings:  Indicate grid layout and relateddimensioning, junctions with other work or ceiling finishes,interrelation of mechanical and electrical items related tosystem, in both existing suspension system and areas wherenew suspension system is required.(#

   ? H&  ((                 C.  H Product Data:  Provide data on metal grid system components,acoustical units, etc.(#

   ? (  ((                 D.  H Samples:  Submit two samples full size illustratingmaterial and finish of acoustical units.(#   h)     =  0*0*0*  Ԍ   ?    ԙ ((                 E.  H Samples:  Submit two samples each, 12 inches long, ofsuspension system main runner, cross runner, and edge trim.(#
 
   ? X  ((                 F.  H Manufacturer's Installation Instructions:  Indicate specialprocedures, perimeter conditions requiring specialattention.(#

   ? x  ((               1.6   QUALIFICATIONS

   ?   ((                  A.  H Grid Manufacturer:  Company specializing in manufacturingthe Products specified in this section with minimum three years documented experience.(#

   ? (
  ((                 B.  H Acoustical Unit Manufacturer:  Company specializing inmanufacturing the Products specified in this section withminimum three years documented experience.(#

   ? H  ((               1.7   REGULATORY REQUIREMENTS

   ?   ((                  A.  H Conform to applicable National codes for fire rated assemblyand combustibility requirements for materials.(#

   ? 0  ((               1.8   ENVIRONMENTAL REQUIREMENTS

   ?   ((                  A.  H Maintain uniform temperature of minimum 60 degrees F, andmaximum humidity of 40 percent prior to, during, and afteracoustical unit installation.(#

   ?   ((               1.9   SEQUENCING

   ? p  ((     	             A.  H Sequence work to ensure acoustical ceilings are notinstalled until  sufficient heat is provided, dustgenerating activities have terminated, and overhead work iscompleted, tested, and approved.(#

   	            2  PART 2 PRODUCTS

   ?   ((                 2.1   SUSPENSION SYSTEM MATERIALS

   ? x  ((                  A.  H Grid Match Existing (#

   ?    ((                 B.  H Grid Materials:  Commercial quality cold rolled steel withgalvanized coating.(#

   ? `"  ((                 C.  H Exposed Grid Surface Width:  To match existing.(#

   ? #  ((                 D.  H Grid Finish: xx! To match existing.(#

   ? %  ((                 E.  H Support Channels and Hangers:  To match existing.(#

   ? '  ((               2.2   ACOUSTICAL UNIT MATERIALS
   '         0*((@@  Ԍ   ?     ((                  A.   To match existing.

               3  PART 3 EXECUTION

   ?    ((                 3.1   EXAMINATION

   ?   ((                  A.  H Verify site conditions under provisions of GeneralConditions.(#

   ?   ((                 B.  H Verify that layout of hangers will not interfere with otherwork.(#

   ? `	  ((               3.2   INSTALLATION - LAY-IN GRID SUSPENSION SYSTEM

   ? 
  ((                  A.  H Install suspension system in accordance with manufacturer'sinstructions and as supplemented in this section.(#

   ? H  ((                 B.   Install system capable of supporting imposed loads to a((   deflection of 1/360 maximum.

   ?   ((                 C.  H Lay out system to a balanced grid design with edge units noless than 50 percent of acoustical unit size, or to fitexisting system layout as required.(#

   ?   ((                 D.  H Hang suspension system independent of walls, columns, ducts,pipes and conduit.  Where carrying members are spliced,avoid visible displacement of face plane of adjacentmembers.(#

   ?   ((                 E.  H Where ducts or other equipment prevent the regular spacingof hangers, reinforce the nearest affected hangers to spanthe extra distance.(#

   ?   ((                 F.  H Do not support components on main runners or cross runnersif weight causes total dead load to exceed deflectioncapability. Support fixture loads by supplementary hangerslocated within 6 inches of each corner; or supportcomponents independently.(#

   ? x  ((                 G.  H Do not eccentrically load system, or produce rotation ofrunners.(#

   ?    ((                 H.  H Install edge molding at intersection of ceiling and verticalsurfaces, using longest practical lengths.  Miter corners. Provide edge moldings at junctions with other interruptions.(#

   ? #  ((                 I.  H Form expansion joints to accommodate plus or minus 1movement.  Maintain visual closure.(#

   ? H&  ((      	           J.  H Install light fixture boxes constructed of gypsum boardabove light fixtures in accordance with UL assemblyrequirements.(#   '        0*((@@  Ԍ   ?    ԙ  1 .1  A. 1. a. 1) a)     
            1 .1  A. 1. a. 1) a)                                                                       ((                3.2   INSTALLATION - ACOUSTICAL UNITS

   ?   ((                  A.  H Install acoustical units in accordance with manufacturer'sinstructions.(#

   ?   ((                 B.  H Fit acoustical units in place, free from damaged edges orother defects detrimental to appearance and function.(#

   ? @  ((                 C.  H Install units after above ceiling work is complete.(#

   ?   ((                 D.  H Install acoustical units level, in uniform plane, and freefrom twist, warp and dents.(#

   ? (
  ((                 E.  H Cut panels to fit irregular grid and perimeter edge trim.  (#

   ?   ((               3.3   ERECTION TOLERANCES

   ? H  ((                  A.  H Maximum Variation from Flat and Level Surface: 1/8 inch in10feet. (#

   ?   ((                 B.  H Maximum Variation from Plumb of Grid Members Caused byEccentric Loads:  2 degrees.(#


# END OF SECTION
