\* \* \* \* \* \* \* \*

READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 12: FURNISHINGS]{.underline}

SECTION 12511 ‑ HORIZONTAL LOUVER BLINDS

USE: Furnishing and installing \"venetian\" blinds and operating
hardware at windows.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs or subparagraphs are not
applicable, the articles, paragraphs or subparagraphs should be deleted;
when necessary, reletter or renumber articles, paragraphs or
subparagraphs.

B. See sample Work Data Sheet format enclosed with this Outline Guide
for developing the sheet to be included in the Contract. Work data
Sheets should not include items shown in the Bid Schedule, except those
developed for Contracts involving more than one project. The Work Data
Sheet is placed in the Invitation for Bids immediately preceding the
drawings.

C. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.01B: Select or add applicable specification sections. Do not list
specification sections from Division 12.

B. 1.02A: Select applicable words.

C. 1.03A; Select applicable phrase.

D. 1.03B: Insert number of copies of manufacturer\'s descriptive
literature required. Normally 5 copies are required. Distribution after
review is normally 1 copy to the COR, 3 copies to the Contractor, and 1
copy to the project file.

E. 1.03C: Insert number of copies of the manufacturer\'s installation
instructions required. Normally 5 copies are required. Distribution
after review is normally 1 copy to the COR, 3 copies to the Contractor,
and 1 copy to the project file.

F. 1.03D: Insert number of copies of shop drawings required. Normally 5
copies are required. Distribution after review is normally 1 copy to the
COR, 3 copies to the Contractor, and 1 copy to the project file.

G. 1.03E: Insert number of samples required. Normally 2 samples are
required. Distribution after review is normally 1 sample to the COR, and
1 sample to the Contractor.

H. 1.04A: Insert number of years required.

I. 1.05A: Insert number of slats required.

J. 1.05B: Insert number of assemblies required.

K. 2.01J: Select applicable cord lock and tilter operation location.

L. 2.01M: Select applicable words.

M. 4.01 and 4.02: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from specification
section. Measurement and payment will be addressed in Part 4 of Section
01010.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 11/01

Metric:

Technical Update: 06/92

SECTION 12511

HORIZONTAL LOUVER BLINDS

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Section Includes: Furnishing and installing horizontal venetian
blinds and operating hardware.

1.2 SYSTEM DESCRIPTION:

A. Performance Requirements: Horizontal metal slat louver blinds
installed at window openings, manual control of raising and lowering by
\[cord;\] \[blade angle adjustable by \[cord.\] \[control wand.\]

1.3 SUBMITTALS:

A. General: Submittals shall be according to \[Section 01009 - General
Information and Requirements.\] \[and\] \[Section 01300 - Submittals.\]
\[and\] \[SEction 01365 - Certificates of Conformance.\]

B. Manufacturer\'s Literature: Submit \[[ ]{.underline}\] copies of the
manufacturer\'s descriptive data for the horizontal louver blinds to be
used on this project.

C. Installation Instructions: Submit \[[ ]{.underline}\] copies of the
manufacturer\'s installation instructions for the horizontal louver
blinds.

D. Shop Drawings: Submit \[[ ]{.underline}\] copies of shop drawings for
the horizontal louver blinds to be used on this project. Shop drawings
shall indicate the following:

1\. ab Field‑measured dimensions of openings scheduled to receive
blinds.

2\. ab Illustrations of special accessory components not included in
manufacturer\'s product data.

3\. Details of head and sill conditions, corner conditions, and
conditions between adjacent blind units.

4\. A numbering plan for identification of each blind with the proper
installation location.

E. Samples: Submit \[[ ]{.underline}\] samples of each \[color\] \[and\]
\[pattern\] \[style\] of the slats to be used on this project. Samples
shall be 6 inches long. Samples shall be actual material in \[Colors
required\] \[the full range of colors required.\]

1.4 QUALITY ASSURANCE:

A. Manufacturer Qualifications: Company specializing in manufacturing
the products specified in this Section with \[[ ]{.underline}\] years
\[documented\] experience.

B. Failure Criteria: Not limited to the following:

1\. Cord breaking.

2\. Cord lock malfunction.

3\. Tilter malfunction.

4\. Mounting brackets loosening.

1.5 MAINTENANCE:

A. Extra Materials: Furnish \[[ ]{.underline}\] additional slats.

B. Furnish \[[ ]{.underline}\] additional complete blind assemblies \[of
each size\].

[PART 2: PRODUCTS]{.underline}

2.01 MATERIALS:

A. Steel Channel Headrail: \"U\" shaped 1 inch high and 1‑1/2 inches
deep channel, fabricated from .025 inch thick sheet steel with rolled
edges at top. Head channel shall have two metal end support braces, 3/4
inch in height with full‑length double ribs for added rigidity.

B. Head Channel Hardware: Metal hardware shall be electroplated with
lift cords and ladders guided by grommets in the head channel which
prevent discoloration. Operating hardware shall be mechanically locked
into head channel. Cord lock and tilter shall be machine riveted to
assure accurate alignment.

C. Enclosed Metal Bottom Rail: Completely enclosed tubular shape, .030
inch thick electro‑galvanized and bonderized steel with prime coat of
chromate epoxy primer and finish coat of polyester baked enamel. Bottom
rail shall be formed after coating with locking groove to receive dust
cover. Thermoplastic protective caps in bottom of rail shall be used to
secure ladder ends and assure window sill protection. Bottom rail
thermoplastic end caps shall have a projecting bottom flange for window
sill protection and hold‑down bracket pins shall be molded in place.

D. Slats: Aluminum 1 inch wide, .010 inch thick before coating. Slats
shall have a precoating treatment to bond polyester baked enamel finish
coating. Total coating thickness shall be 1 mil. After coating,
thickness shall be .011 inch.

E. Ladder Drum and Cradles: Blinds shall have a cradle and ladder drum
for each ladder.

1\. Cradle: .040 inch thick electroplated steel. Cradle shall support
tilting rod, provide a smooth bearing and center ladder drum over ladder
hole. Incorporated with cradle shall be a separate grommet guide lift
cord and ladder through bottom of headrail. Grommet shall have rounded
edges to prevent cord and ladder wear and discoloration.

2\. Ladder Drum: .031 inch thick electroplated steel with a smooth
rolled edge hole each side to attach braided ladders.

F. Low Friction Cord Lock: Cord lock shall have 9/16 inch diameter nylon
main roller in conjunction with a sliding bar‑type locking mechanism.
Locking mechanism shall be free of abrasive locking teeth and offer
minimum wear to cord. Locking mechanism shall be of crash‑proof type and
shall lock automatically upon release of cord.

G. Tilter: A tilter and gear case arrangement shall be used on the wand
tilter. Gear case shall be enclosed type with worm‑and‑gear
construction. Gear shall be factory lubricated, designed for smooth
operation and shall hold slats at any angle and prevent movement of
slats due to vibration.

1\. Wand Tilter: Operated by a length of transparent extruded plastic
rod with a multi‑sided cross section measuring approximately 3/8 inch
across points. Plastic wand shall hang vertically by its own weight and
shall be of a convenient length for easy operation. Plastic wand shall
be easily detachable. Tilter shall be securely riveted to headrail.

H. Braided Slat Supports: Blinds shall have braided ladder which will
assure proper control and adequate overlap of slats.

1\. Material: Polyester yarn. Vertical component shall be not less than
.045 inch diameter nor greater than .066 inch diameter, which will
provide maximum strength and flexibility with minimum stretch.
Horizontal component, or rungs, shall be not less than four threads and
shall be 1‑3/16 inch long. There shall be 15 rungs per foot equally
spaced for proper support.

2\. Metal Clip: Machine clinched to end of each braided ladder to lock
in holes of drum and removable metal clip wire shall join braided
ladders at bottom rail. Distance between end support and end of slats
shall not exceed 6 inches. Distance between braided ladders shall not
exceed 22 inches.

I. Lift Cord: Braided with polyester jackets and rayon center core.
Cords shall be detachable, if required, and shall be of sufficient
length to properly control the raising or lowering of the blind. Lift
shall be equipped with tassel.

J. Cord Lock and Tilter Operation Locations: The cord lock and tilter
operating location when viewed from within the room: shall be located
with the \[Tilter at left, cord lock at right (standard).\] \[Tilter at
right, cord lock at left.\] \[Tilter and cord lock at left.\] \[Tilter
and cord lock at right.\]

K. Installation Brackets: Conventional hinged brackets, .042 inch thick
electrogalvanized and bonderized steel with prime coat of epoxy primer
and finish coat of polyester baked enamel in color to match headrail.
Brackets shall be marked left and right to facilitate installation and
shall have 1‑1/4 inch extrawide top to accommodate power screw driver.
Brackets shall facilitate easy removal of head channel. Optional
headrail pocket support brackets shall be electroplated, and shall
facilitate installation of blind in pocket.

L. Intermediate Support Brackets: Brackets shall be furnished for blinds
over 60 inches wide. Maximum spacing for intermediate support brackets
shall be 48 inches.

M. Size: Lengths and widths shall be as required for installation
\[between the jambs\] \[and mullions\] \[outside the jambs\] \[and
mullions\] \[as shown on the drawings.\]

N. Audio‑Visual Blinds: In addition to requirements for blinds, each
unit shall include light traps at headrail, sides and sill. Light traps
shall be constructed from aluminum or sheet steel, not less than 0.10
inch thick, U‑shaped, with legs not less than 1‑3/4 inches long. Edges
contacting blinds shall be rounded or beaded. Inside surfaces of light
traps shall be finished in a dull black color.

[PART 3: EXECUTION]{.underline}

3.1 EXAMINATION:

A. Verification of Conditions: Verify that surfaces and conditions in
which blinds will be installed are free of conditions interfering with
blind installation.

3.2 INSTALLATION:

A. General: Install blinds upon completion of construction and finish
processes in the rooms receiving blinds.

B. Horizontal Louver Blinds: Install blinds level and at a height to
permit full length operation. Use suitable type and size fasteners for
the application. Isolate metal parts from direct contact with concrete,
mortar, or dissimilar metals. Blinds installed in recessed pockets shall
be removable without disturbing the pocket. The entire blind, when
retracted, shall be contained behind the pocket. For blinds installed
outside the jambs and mullions, overlap each jamb and mullion 3/4 inch
or more when the jamb and mullion sizes permit. Include hardware,
brackets, anchors, fasteners and accessories necessary for a complete
finished installation.

C. Identification: According to the numbering plan, mark each opening
and the corresponding blind with identical numbers. For multiple windows
separated by mullions, the space required by each blind shall be
numbered separately. Use brass or aluminum plates, or stamp
corresponding numbers on unexposed surfaces of openings and the head
box. Fasten plates to the back of head box and sill track.

3.3 FIELD QUALITY CONTROL:

A. Audio‑Visual Blinds Field Test: When closed against full midday
summer sunny conditions, installed audio visual blinds shall be capable
of reducing the natural light level of the space to an average of 0.16
footcandles as measured by a footcandle meter.

3.4 ADJUSTING:

A. Requirements: Adjust clearances and overlaps to permit unencumbered
operation.

3.5 CLEANING:

A. Requirements: Clean soiled blind surfaces and components.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT:

A. ab Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. The Contractor shall include consideration for this item
in the bid price for other items of the Contract.

END OF SECTION