HomeMy WebLinkAbout06 17 53 - Metal Plate Connected Wood TrussesMidtown West 17070
Carmel, Indiana September 15, 2017
SECTION 06 17 53 – METAL PLATE CONNECTED WOOD TRUSSES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Wood roof trusses.
2. Wood floor trusses.
3. Wood girder trusses.
4. Wood truss bracing.
5. Metal truss accessories.
B. Related Requirements:
1. Section 06 16 00 "Sheathing" for roof sheathing and subflooring.
1.3 DEFINITIONS
A. Metal-Plate-Connected Wood Trusses: Planar structural units consisting of metal-plate-
connected members fabricated from dimension lumber and cut and assembled before delivery
to Project site.
1.4 ACTION SUBMITTALS
A. Shop Drawings: Show fabrication and installation details for trusses.
1. Show location, pitch, span, camber, configuration, and spacing for each type of truss
required.
2. Indicate sizes, stress grades, and species of lumber.
3. Indicate locations of permanent bracing required to prevent buckling of individual truss
members due to design loads.
4. Indicate locations, sizes, and materials for permanent bracing required to prevent
buckling of individual truss members due to design loads.
5. Indicate type, size, material, finish, design values, orientation, and location of metal
connector plates.
6. Show splice details and bearing details.
B. Delegated-Design Submittal: For metal-plate-connected wood trusses indicated to comply with
performance requirements and design criteria, including analysis data signed and sealed by the
qualified professional engineer responsible for their preparation.
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1.5 QUALITY ASSURANCE
A. Metal Connector-Plate Manufacturer Qualifications: A manufacturer that is a member of TPI
and that complies with quality-control procedures in ANSI/TPI 1 for manufacture of connector
plates.
1. Manufacturer's responsibilities include providing professional engineering services
needed to assume engineering responsibility.
2. Engineering Responsibility: Preparation of Shop Drawings and comprehensive
engineering analysis by a qualified professional engineer.
B. Fabricator Qualifications: Shop that participates in a recognized quality-assurance program that
complies with quality-control procedures in ANSI/TIP 1 and that involves third-party inspection
by an independent testing and inspecting agency acceptable to Architect and authorities having
jurisdiction.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Handle and store trusses to comply with recommendations in BCSI, "Building Component
Safety Information: Guide to Good Practice for Handling, Installing, Restraining, & Bracing Metal
Plate Connected Wood Trusses."
1. Store trusses flat, off of ground, and adequately supported to prevent lateral bending.
2. Protect trusses from weather by covering with waterproof sheeting, securely anchored.
3. Provide for air circulation around stacks and under coverings.
B. Inspect trusses showing discoloration, corrosion, or other evidence of deterioration. Discard
and replace trusses that are damaged or defective.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000
"Quality Requirements," to design metal-plate-connected wood trusses.
B. Structural Performance: Provide metal-plate-connected wood trusses capable of withstanding
design loads within limits and under conditions indicated. Comply with requirements in
ANSI/TPI 1 unless more stringent requirements are specified below.
1. Design Loads: As indicated.
2. Maximum Deflection Under Design Live/Snow Loads:
a. Roof Trusses: Vertical deflection of 1/360 of span.
b. Floor Trusses: Vertical deflection of 1/480 of span.
C. Comply with applicable requirements and recommendations of the following publications:
1. ANSI/TPI 1, "National Design Standard for Metal Plate Connected Wood Truss
Construction."
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2. TPI DSB, "Recommended Design Specification for Temporary Bracing of Metal Plate
Connected Wood Trusses."
3. BCSI, "Building Component Safety Information: Guide to Good Practice for Handling,
Installing, Restraining, & Bracing Metal Plate Connected Wood Trusses."
D. Wood Structural Design Standard: Comply with applicable requirements in AF&PA's "National
Design Specifications for Wood Construction" and its "Supplement."
2.2 DIMENSION LUMBER
A. Lumber: DOC PS 20 and applicable rules of grading agencies indicated. If no grading agency
is indicated, provide lumber that complies with the applicable rules of any rules writing agency
certified by the ALSC Board of Review. Provide lumber graded by an agency certified by the
ALSC Board of Review to inspect and grade lumber under the rules indicated.
1. Factory mark each piece of lumber with grade stamp of grading agency.
2. For exposed lumber indicated to receive a stained or natural finish, omit grade stamp and
provide certificates of grade compliance issued by grading agency.
3. Provide dressed lumber, S4S.
4. Provide dry lumber with 19 percent maximum moisture content at time of dressing.
B. Permanent Bracing: Provide wood bracing that complies with requirements for miscellaneous
lumber in Section 06 10 00 "Rough Carpentry."
2.3 METAL CONNECTOR PLATES
A. Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
1. Alpine Engineered Products, Inc.; an ITW company.
2. Cherokee Metal Products, Inc.; Masengill Machinery Company.
3. Eagle Metal Products.
4. MiTek Industries, Inc.; a subsidiary of Berkshire Hathaway Inc.
5. Truswal Systems Corporation; an ITW company.
B. Source Limitations: Obtain metal connector plates from single manufacturer.
C. General: Fabricate connector plates to comply with ANSI/TPI 1.
D. Electrolytic Zinc-Coated Steel Sheet: ASTM A 591, 80Z coating designation; ASTM A 570,
Structural-Steel Sheet, Grade 33; and not less than 0.047 inch thick.
1. Use for interior locations unless otherwise indicated.
E. Stainless-Steel Sheet: ASTM A 666, Type 304, and not less than 0.035 inch thick.
1. Use for exterior locations and where indicated.
2.4 FASTENERS
A. General: Provide fasteners of size and type indicated that comply with requirements specified
in this article for material and manufacture.
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1. Provide fasteners for use with metal framing anchors that comply with written
recommendations of metal framing manufacturer.
2. Where trusses are exposed to weather, or in area of high relative humidity, provide
fasteners with hot-dip zinc coating complying with ASTM A 153.
B. Nails, Brads, and Staples: ASTM F 1667.
2.5 METAL FRAMING ANCHORS AND ACCESSORIES
A. Basis of Design Product: Subject to compliance with requirements, provide product indicated
on Drawings or comparable product by one of the following:
1. Cleveland Steel Specialty Co.
2. KC Metals Products, Inc.
3. Phoenix Metal Products, Inc.
4. Simpson Strong-Tie Co., Inc.
5. USP Structural Connectors.
B. Allowable Design Loads: Provide products with allowable design loads, as published by
manufacturer, that meet or exceed those of basis-of-design products. Manufacturer's published
values shall be determined from empirical data or by rational engineering analysis and
demonstrated by comprehensive testing performed by a qualified independent testing agency.
C. Galvanized-Steel Sheet: Hot-dip, zinc-coated steel sheet complying with ASTM A 653, G60
coating designation.
2.6 MISCELLANEOUS MATERIALS
A. Galvanizing Repair Paint: SSPC-Paint 20, with dry film containing a minimum of 94 percent
zinc dust by weight.
2.7 FABRICATION
A. Cut truss members to accurate lengths, angles, and sizes to produce close-fitting joints.
B. Fabricate metal connector plates to sizes, configurations, thicknesses, and anchorage details
required to withstand design loads for types of joint designs indicated.
C. Assemble truss members in design configuration indicated; use jigs or other means to ensure
uniformity and accuracy of assembly with joints closely fitted to comply with tolerances in
ANSI/TPI 1. Position members to produce design camber indicated.
1. Fabricate wood trusses within manufacturing tolerances in ANSI/TPI 1.
D. Connect truss members by metal connector plates located and securely embedded
simultaneously in both sides of wood members by air or hydraulic press.
PART 3 – EXECUTION
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3.1 INSTALLATION
A. Install wood trusses only after supporting construction is in place and is braced and secured.
B. If trusses are delivered to Project site in more than one piece, assemble trusses before
installing.
C. Hoist trusses in place by lifting equipment suited to sizes and types of trusses required,
exercising care not to damage truss members or joints by out-of-plane bending or other causes.
D. Install and brace trusses according to TPI & BCSI recommendations and as indicated.
E. Install trusses plumb, square, and true to line and securely fasten to supporting construction.
F. Space trusses as indicated; adjust and align trusses in location before permanently fastening.
G. Anchor trusses securely at bearing points; use metal truss tie-downs or floor truss hangers as
applicable. Install fasteners through each fastener hole in metal framing anchors according to
manufacturer's fastening schedules and written instructions.
H. Securely connect each truss ply required for forming built-up girder trusses.
1. Anchor trusses to girder trusses as indicated, and only after all girder plys are in place
and fastened together as required.
I. Install and fasten permanent bracing during truss erection and before construction loads are
applied. Anchor ends of permanent bracing where terminating at walls or beams.
1. Install bracing to comply with Section 061000 "Rough Carpentry" and BCSI.
2. Install and fasten strongback bracing vertically against vertical web of parallel-chord floor
trusses at centers indicated.
J. Install wood trusses within installation tolerances in BCSI.
K. Do not alter trusses in field. Do not cut, drill, notch, or remove truss members.
L. Replace wood trusses that are damaged or do not meet requirements.
1. Damaged trusses may be repaired according to truss repair details signed and sealed by
the qualified professional engineer responsible for truss design, when approved by
Engineer of Record.
3.2 REPAIRS AND PROTECTION
A. Repair damaged galvanized coatings on exposed surfaces with galvanized repair paint
according to ASTM A 780 and manufacturer's written instructions.
END OF SECTION 06 17 53
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