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READ AND REMOVE THIS OUTLINE GUIDE BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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O U T L I N E G U I D E

[DIVISION 6: WOOD AND PLASTICS]{.underline}

SECTION 06192 - PREFABRICATED WOOD TRUSSES

USE: Furnishing and installing the pre-fabricated wood trusses which
support the roofing.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[[ ]{.underline}\] 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/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 specifications that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, RS-110
or call (303) 987-6851.

F. DESIGN NOTES:

1\. **DRAWING DATA REQUIRED:**

Extent and location of trusses; design loadings required to permit
fabricator's design of members and connections; dimensions and
configurations including spans, pitch, camber, sizes and spacing;
connection details; bracing arrangement and details; anchorage and
bearing details.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes 09/00

Metric: Not Applicable

Technical Update: 09/00

SECTION 06192

PRE-FABRICATED WOOD TRUSSES

[PART 1: GENERAL]{.underline}

1.1 SUMMARY

A. Section Includes: Furnishing and installing the pre-fabricated wood
trusses which support the roofing.

B. Related Sections:

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LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED UNDER
THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION. THIS ARTICLE
IS RARELY REQUIRED.

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1.2 SUBMITALS

A. General: Submittals shall be according to \[Section - 01009 - General
Information and Requirements,\] \[and\] \[Section 01330 - Submittal
Procedures\] \[and\] \[Section 01331 - Certificates\].

B. Shop Drawings: Submit \[[ ]{.underline}\] copies of shop \[and
erection\] drawings and calculations for the prefabricated wood trusses
to be used on this project. Drawings and calculations shall be prepared
by and bear the stamp of a registered professional engineer. Shop
drawings shall indicate location, pitch, span, camber, configuration,
and spacing for each type of truss required; species, sizes, and grade
of lumber; splice details; type, size, material, finish, design values,
orientation, and location of metal connector plates; and bearing
details. Drawings shall be \[same\] \[larger\] scale as the full size
Contract drawings.

1.3 QUALITY ASSURANCE

A. Labeling Requirements: Factory-mark each member with the mark of a
recognized grading agency which identifies the species and grade.

B. Failure Criteria: Not limited to the following:

1\. Disengagement of wooden members from a connecting metal plate.

2\. Sag at center of span sufficient to cause cracking or visible
deflection of finish or subsurface ceiling material.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Do not wrack or twist trusses during movement. Loading,
unloading and erecting of trusses shall be conducted in a manner and
form which will not cause excessive stresses in the member or joists.

B. Storage: Comply with TPI recommendations to avoid damage and lateral
bending. Provide for air circulation around stacks and under coverings.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS

A. Chord and Web Members: Provide dimension lumber of any species for
truss chord and web members, graded visually or mechanically, and
capable of supporting required roads without exceeding allowable design
values according to AFPA's "Natural Design Specifications for Wood
Construction" and its "Supplement".

B. Moisture Content: Shall be 19 percent at time of dressing.

C. Metal Connector Plates: Shall be manufactured in accordance with TPI.

D. Metal Framing Anchors: Shall be constructed to the structural
capacity, type, and size indicated using hot-dip, zinc-coated steel
according to ASTM A 650, coating designation G 60, 18 gauge minimum
thickness. Special nails supplied by manufacturer shall be used for
nailing of anchors.

E. Bracing: Shall be 2-inch x 4-inch and 1-inch x 4-inch \[50 mm x 100
mm and 25 mm x 100 mm\] lumber of Douglas Fir, Hemlock, or Larch,
construction grade, according to WCLIB or WWPA.

F. Box Nails: FS, FF-N-105

2.2 FABRICATION

A. Requirements:

1\. Trusses shall be shop manufactured in accordance with TPI 1.

2\. Roof trusses shall be capable of carrying uniform and point loads as
follows:

a\. Top chord live load \[[ ]{.underline}\] pounds per square foot.

b\. Top chord dead load \[[ ]{.underline} Pounds per square foot.

c\. Bottom chord dead load \[[ ]{.underline}\] pounds per square foot.

d\. Wind load \[[ ]{.underline}\] pounds per square foot.

e\. Point load \[[ ]{.underline}\] pounds, located \[[ ]{.underline}\].

[PART 3: EXECUTION]{.underline}

3.1 EXAMINATION

A. Verification of Conditions: Prior to erecting trusses, verify that
bearing surfaces are completed as required, are properly braced and are
correctly spaced horizontally to ensure proper alignment with the truss
bearing surfaces.

B. Inspection: Do not erect trusses until the Contracting Officer has
inspected each truss for faulty fabrication, including surface defects.
Trusses found unacceptable shall be repaired as instructed or replaced
in entirety at the Contractor's expense.

3.2 INSTALLATION

A. Requirements: Install and brace trusses according to TPI
recommendations and as indicated on the erection drawings.

B. Spacing: Truss spacing shall be that shown on the approved shop
drawings. Adjust and align trusses before permanently fastening.

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IF A RIGID CEILING (SUCH AS GYPSUM BOARD) WILL BE DIRECTLY APPLIED TO
THE BOTTOM CHORD OF THE TRUSS, THE PERMANENT BRACING BELOW MAY BE
DELETED.

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C. Permanent Bracing: Trusses shall be braced with 1-inch x 4-inch \[25
mm x 100 mm\] nominal wood members installed perpendicular to the
trusses over the lower chord members and nailed to the chord with 2-6d
nails.

D. Bearing: Trusses shall be toe-nailed to wall plate with 2-10d nails
each side. In addition, framing anchors shall be installed at each
truss, both ends, to fasten to bearing plates against uplift and
movement of any kind.

E. Exposure: Trusses may be exposed to rain two days maximum during
erection only. Otherwise protect from moisture.

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

4.1 METHOD OF MEASUREMENT

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WHEN A "LUMP SUM" CONTRACT IS USED, DELETE THE TITLE PART 4: MEASUREMENT
AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION. MEASUREMENT AND
PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01009 - GENERAL
INFORMATION AND REQUIREMENTS OR SECTION 01010- SUMMARY OF WORK. WHEN NOT
A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO
MEASUREMENT" PHRASE WHEN NONE OF THE PAY ITEMS IN THS SECTION ARE
INCLUDED IN THE BID SCHEDULE.

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A. Units: The work described in this section will \[not be measured for
payment\]. \[be measured for and paid for\] \[on a lump-sum basis\].

4.2 BASIS OF PAYMENT

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WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE, SELECT APPLICABLE
PHRASES; USE THE "NO DIRECT PAYMENT" PHRASE WHEN NONE OF THE PAY ITEMS
IN THE SPECIFICATION ARE INCLUDED IN THE BID SCHEDULE.

WHEN NOT A "LUMP SUM" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS
SECTION, SELECT APPLICABLE PAY ITEMS. DO NOT CHANGE PAY ITEM NUMBER.
WHEN MORE THAN ONE DIAMETER OR GAUGE IS SPECIFIED FOR ANY PAY ITEM,
LETTER SUFFIXES WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.
WHEN GOVERNMENT-FURNISHED PROPERTY IS SPECIFIED FOR PAY ITEMS, THE
LETTER SUFFIX GF WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.

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A. Payment: \[No direct payment for the work described under this
section will be made. Consideration for this item shall be included in
the bid price for other items of the Contract\]. \[Prices and payment
will be full compensation for the work described in this section.
Payment will be made under:\]

[Pay Item Pay Unit]{.underline}

END OF SECTION