General Construction Specifications
SECTION 06193
PLATE CONNECTED WOOD TRUSSES
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Shop fabricated wood trusses for roof framing.
B. Bridging, bracing, and anchorage.
C. Preservative treatment of wood.
1.02 RELATED SECTIONS
A. Section 03000 - Cast In Place Concrete: Setting anchors in concrete.
B. Section 06112 - Framing and Sheathing.
C. Section 06114 - Wood Blocking and Curbing.
1.03 REFERENCES
A. ALSC - American Lumber Standards Committee: Softwood Lumber Standards.
B. ASTM A167 - Stainless and Heat Resisting Chromium - Nickel Steel Plate, Sheet, and Strip.
C. ASTM A446 - Steel Sheet, Zinc Coated (Galvanized) by the Hot-Dip Process, Structural (Physical) Quality.
D. APA - American Plywood Association.
E. AWPA (American Wood Preservers Association) C1 - All Timber Products Preservative Treatment by Pressure Process.
F. AWPA (American Wood Preservers Association) C20 - Structural Lumber Fire Retardant Treatment by Pressure Process.
G. NFPA: National Forest Products Association.
H. SPIB: Southern Pine Inspection Bureau.
I. TPI (Truss Plate Institute) BWT-76 - Bracing Wood Trusses.
J. TPI (Truss Plate Institute) HET-80 - Handling and Erecting Wood Trusses.
K. TPI (Truss Plate Institute) PCT-80 - Metal Plate Connected Parallel Chord Wood Trusses.
L. TPI (Truss Plate Institute) TPI-85 - Metal Plate Connected Wood Trusses.
1.04 SYSTEM DESCRIPTION
A. Design roof live [and dead] load: 25 lbs/sq ft with deflection limited to 1/240.
B. Design gable end wall trusses, including required headers for required dead, live and wind loads. Configure gable end wall trusses to accommodate louvers.
1.05 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Shop Drawings: Indicate sizes and spacing of trusses, loads and truss cambers, framed openings and bracing. Submit design calculations.
C. Product Data: Provide truss configurations, bearing and anchor details, bridging and bracing, and connections.
1.06 QUALITY ASSURANCE
A. Perform Work in accordance with the following agencies:
1. Lumber Grading Agency: Certified by ALSC.
2. Plywood Grading Agency: Certified by APA.
B. Truss Design, Fabrication, and Installation: In accordance with Truss Plate Institute BWT-76, HET-80, PCT-80 including Supplement, TPI-85 including Supplement, QST-88.
1.07 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum three years documented experience.
B. Design trusses including gable end wall trusses under direct supervision of a Professional Structural Engineer experienced in design of this Work and licensed in the State of Tennessee.
1.08 REGULATORY REQUIREMENTS
A. Conform to the Standard Building Code for loads, seismic zoning, and other governing load criteria.
1.09 DELIVERY, STORAGE, AND HANDLING
A. Deliver, store, protect, and handle products to the site under provisions of Section 01600.
B. Handle and erect trusses in accordance with TPI HET-80.
C. Store trusses in vertical position resting on bearing ends.
1.10 FIELD MEASUREMENTS
A. Verify that field measurements are as indicated on shop drawings.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Alpine Engineered Products, Inc.
B. Gang-Nail.
C. Substitutions: Under provisions of Section 01600.
2.02 MATERIALS
A. Lumber Grading Rules: NFPA SPIB.
B. Wood Members: Single top and bottom chord, Stress Group A, Douglas Fir or Southern Pine species No. 2 grade or better, 19 percent maximum and 7 percent minimum moisture content. Finger scarfing not permitted.
Steel Connectors: ASTM A446 steel, Grade B, hot dip galvanized; die stamped with integral teeth.
Truss Bridging: Type, size and spacing recommended by truss manufacturer.
2.03 ACCESSORIES
A. Wood Blocking Plating Support Members Framing for Openings: In accordance with Section 06114 06112.
B. Fasteners: Hot dip galvanized steel, type to suit application.
C. Bearing Plates: Hot dip galvanized.
2.04 FABRICATION
A. Fabricate trusses to achieve structural requirements specified.
B. Brace wood trusses in accordance with TPI BWT-76.
2.05 WOOD TREATMENT
A. Wood Preservative Pressure Treatment: AWPA Treatment C1 using water borne preservative with 0.25 percent retainage.
PART 3 - EXECUTION
3.01 EXAMINATION
A. Verify that supports and openings are ready to receive trusses.
3.02 PREPARATION
A. Coordinate placement of bearing and/or support items.
3.03 ERECTION
A. Install trusses in accordance with manufacturer's instructions.
B. Set members level and plumb, in correct position.
C. Make provisions for erection loads, and for sufficient temporary bracing to maintain structure plumb, and in true alignment until completion of erection and installation of permanent bracing.
D. Do not field cut or alter structural members without approval of Architect/Engineer.
E. Place headers and supports to frame openings required.
F. Frame openings between trusses with lumber in accordance with Section 06114, 06112.
G. Coordinate placement of decking with work of this section.
H. After erection, touch-up galvanized surfaces with zinc primer.
3.04 TOLERANCES
A. Framing Members: 1/2 inch maximum, from true position.
END OF SECTION
