SECTION 11 52 12
MANUALLY OPERATED PROJECTION SCREENS
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SECTION 11 52 12
MANUALLY OPERATED PROJECTION SCREENS
PART1-GENERAL
1.1
GENERAL PROVISIONS
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
Carefully review and examine all other Contract Documents for requirements therein
affecting the work of this Section. Furthermore, coordinate and sequence the work of this
Section with all other trades affected.
1.2
SUMMARY
Furnish and install manually operated front projection screens and pertinent accessories
where as indicated on Drawings and/or as specified in this Section.
1.3
RELATED WOK
Examine Contract Documents for requirements that affect work of this section. Other
Specification sections that relate directly to work of this section include, but not limited to:
Division 6 Section "Misc. Rough Carpentry": for wood blocking, grounds, nailers
and shims required to support the screen mounting brackets.
Division 9 Section "Gypsum Boards": for abutting drywall construction and
substrate.
Division 9 Section "Acoustical Ceilings": for abutting ceiling assemblies and edge
trims.
1.4
DEFINITIONS
Gain: Indication of screen's luminance or brightness, measured perpendicular to screen
center and relative to magnesium carbonate block, which serves as standard for 1.0
gain. Higher numbers indicate greater brightness.
Viewing Angle: Horizontal angle from perpendicular center of screen at which gain or
brightness decreases by 50%.
Format: Proportion of projection screen viewing area expressed as a ratio of width/height.
2.
3.
4.
5.
6.
1.5
NTSC or Video Format: 1.33:1.
HDTV Format: 1.78:1.
16:10 Wide: 1.60:1.
Cinemascope: 2.35:1.
Letterbox: 1:85:1.
Square: 1:1.
SUBMITTALS
A.
Submit under the provisions of Division 1 Section "Submittal Procedures - CM R".
Product Data.
Shop Drawings: Provide shop drawings for fabrication, and installation of all parts
of the work. Provide details of anchorage, connections and accessory items.
Provide installation templates for work installed by others. Show all interfaces
and relationships to work of other trades. Provide wiring diagrams for electrically
operated units.
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PROJECT NO. BI-RT-844-CMR
SECTION 11 52 12
MANUALLY OPERATED PROJECTION SCREENS
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B.
Sustainable Design:
GREENGUARD Indoor Air Quality Certification® (certification #90068) indicating
that screen surfaces meet performance-based standards to define goods with
low chemical and particle emissions for use indoors.
The viewing surfaces shall have the GREENGUARD Children and Schools
Certification indicating that these surfaces comply with the State of California's
Department of Health Services Standard Practice (CA Section 01350) for testing
chemical emissions from building products used in schools. As such,
GREENGUARD Children and Schools Certified products can be used as a
strategy to earn credits in MA-CHPS Best Practices Manual for K-12 schools.
1.6
REFERENCES
International Code Council (ICC):
International Building Code.
Society of Motion Picture and Television Engineers (SMPTE):
SMPTE RP 94-2000, Gain Determination of Front Projection Screens.
Underwriters Laboratories Inc. (UL).
Underwriters' Laboratories of Canada (ULC).
1.7
QUALITY ASSURANCE
Qualifications: Worker experienced in performing work of this section who has
specialized in work similar to that required of this project.
B.
Regulatory Requirements: Comply with Massachusetts State Building Code.
Field Measurements: Take all necessary field measurements before preparation of shop
drawings and fabrication. Do not delay progress of the job. If field measurements are
not possible prior to fabrication, allow for field cutting and fitting.
1.8
DELIVERY, STORAGE & HANDLING
Storage and Protection: Store electric projection screens in a dry, ventilated area,
protected from exposure to harmful weather conditions, at a temperature less than 80
degrees F (27 degrees C).
Handling: Handle electrically operated projection screen materials with care in order to
prevent damage.
Deliver materials in manufacturer's original, unopened, undamaged containers with
identification labels intact.
Waste Management and Disposal: Separate waste materials for reuse and recycling in
accordance with Division 1 Section "Construction Waste Management & Disposal CMR".
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
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Provide products from one of the following manufacturers, or Architect approved equal:
1
Da-Lite Screen Co., Inc., Warsaw IN.
2
3
Draper Shade and Screen Co., Inc., Spiceland, IN.
Bretford Manufacturing Co., Schiller Park, IL.
PROJECT NO. BI-RT-844-CMR
SECTION 11 52 12
MANUALLY OPERATED PROJECTION SCREENS
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4.
2.2
Or equal as approved by Architect.
PROJECTION SCREEN - MANUALLY OPERATED
Location: as indicated on Drawings.
Manufacturer and Type: Except where noted otherwise, shall be 60" x 60", wallmounted, manually-operated projection screens 'Model C' by Da-Lite Co., or approved
equal from another specified manufacturer.
Description: Screen surface shall be flame and mildew-resistant fiberglass fabric, matte
white, with 2 inch black masking borders. Screens shall be secured to 3-inch diameter
ball-bearing rigid steel spring rollers. Case shall be of pressed 22 gauge steel with
baked enamel finish, and shall be complete with plated steel end caps with steel inner
plates to support the roller tube and form sturdy wall brackets. Bottom of screen shall be
equipped with tubular metal slat concealed within the bottom seam pocket. An extruded
aluminum saddle with plated steel pads shall be screwed to the slat at each end. Ends of
slat shall be protected by heavy-duty plastic caps. A pull cord shall be provided at
bottom of screen. Metal bumper stops, padded with sponge rubber, shall be built into
case to prevent flat wedging inside case.
Integral metal brackets shall be supplied for mounting to wall construction, as
indicated. Concealed wood blocks for mounting of brackets shall be provided by
Rough Carpentry and Gypsum Drywall trades.
2
Include aluminum pull-down pole at each screen.
PART 3 - EXECUTION
3.1
COORDINATION
Coordinate electric projection screen placement with placement of other ceiling and wall
mounted components.
3.2
EXAMINATION
A.
Site Verification of Conditions:
2.
3.
4.
3.3
Verify that conditions of substrates previously installed under other sections or
contracts are acceptable with electrically operated projection screen installation.
Ensure electrical power supply is installed to meet electric projection screen
requirements.
Inform Construction Manager of unacceptable conditions immediately upon
discovery.
Proceed with installation only after unacceptable conditions have been corrected.
INSTALLATION
General: Install projection screens at locations indicated and in compliance with
manufacturer's printed instructions.
Securely install screens plumb and level to supporting substrate. Install projection
screens with screen case in position and relationship to adjoining work as indicated on
approved shop drawings. Securely anchor workto supporting substrate.
3.4
FIELD QULITY CONTROL
A.
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Testing and Inspection: Operate each screen 3 times to ensure viewing surfaces extend
PROJECT NO. BI-RT-844-CMR
SECTION 11 52 12
MANUALLY OPERATED PROJECTION SCREENS
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and retract through full range of motion.
3.5
B.
Verify screen operations do not interfere with controls, limit switches, doors or other
components function as designed and meet project requirements.
C.
Ensure viewing surface raising operation fully engages and lifts screen closure door into
closed position.
D.
Adjust operating components to allow for smooth, unobstructed screen operation.
FINAL CLEANING
A.
3.6
Upon completion, remove surplus materials, rubbish, tools and equipment.
PROTECTION
A.
B.
Protect projection screens from damage during construction.
Repair damage to adjacent construction caused by manually operated projection screen
work.
END OF SECTION
102313
PROJECT NO. BI-RT-844-CMR