2150 & 2160 E Fourth St - Trusses - Plan

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TPI 1-2014 REQUIREMENTS OF THE TRUSS DESIGNER AND MANUFACTURER 2.3.5 Requirements of the Truss Designer. 2.3.5.1 Preparation of Truss Drawings. The Truss Designer is responsible for the preparation of the Truss Design Drawings based on the Truss design criteria and requirements set forth in the Construction Documents or as otherwise set forth in writing by the Building Designer as supplied to the Truss Designer by the Contractor through the Truss Manufacturer. 2.3.5.2 Single Truss Component Design. The Truss Designer shall be responsible for the design, in accordance with this Standard, of each singular Truss depicted on each Truss Design Drawing. 2.3.5.3 Truss Design Drawing Seal and Signature Where the Legal Requirements mandate a Registered Design Professional for buildings, each individual Truss Design Drawing shall bear the seal and signature of the Truss Designer. Exception: When a Cover/Truss Index Sheet is used, it is the only document required to be signed and sealed by the Truss Designer. 2.3.5.4 Truss Placement Diagram. When the Truss Placement Diagram serves only as a guide for Truss installation, it does not require the seal of the Truss Designer. 2.3.5.5 Information on Truss Design Drawings. Truss Design Drawings shall include, at a minimum, the information specified below: (a) Building Code used for design, unless specified on Cover/Truss Index Sheet. (b) Slope or depth, span and spacing. (c) Location of all joints and support locations. (d) Number of plies if greater than one. (e) Required bearing widths. (f) Design loads as applicable, including 1. Top Chord live load (for roof Trusses, this shall be the controlling case of live, snow or rain load); 2. Top Chord dead load; 3. Bottom Chord live load; 4. Bottom Chord dead load; 5. Additional loads and locations; 6. Environmental load design criteria (wind speed, snow, rain, seismic, and all applicable factors as required to calculate the Truss loads); and 7. Other lateral loads, including drag strut loads. (g) Adjustments to Wood Member and Metal Connector Plate design values for conditions of use. (h) Maximum reaction force and direction, including maximum uplift reaction forces where applicable. (i) Metal Connector Plate type, manufacturer, size, and thickness or gauge, and the dimensioned location of each Metal Connector Plate except where symmetrically located relative to the joint interface. (j) Size, species and grade for each Wood Member. (k) Truss-to-Truss connection and Truss field assembly requirements. (l) Calculated span to deflection ratio and/or maximum vertical and horizontal deflection for live load and for live plus dead load and as applicable per Section 7.6. (m) Maximum axial tension and compression forces in the Truss members. (n) Fabrication tolerance per Section 6.4.10. (o) Required Permanent Individual Truss Member Restraint Location. (p) Truss Designer 2.3.5.6 Responsibility Exemptions. The Truss Designer is responsible for items listed in Section 2.3.5 and is not responsible for the requirements of other parties specified outside of Section 2.3.5. 2.3.6 Requirements of the Truss Manufacturer. 2.3.6.1 Truss Design Criteria and Requirements. The Truss Manufacturer shall obtain the Truss design criteria and requirements from the Construction Documents. 2.3.6.2 Communication to Truss Design Engineer. The Truss Manufacturer shall communicate the truss design criteria and requirements to the Truss Designer. 2.3.6.3 Alternate Truss Designs. If an alternative or partial set of truss design(s) is proposed either by the Truss Manufacturer or the Truss Designer, such alternative set of design(s) shall be sent to and reviewed by the Building Designer for the Building prior to manufacturing. Where the Legal Requirements mandate a Registered Design Professional for buildings, these alternative set of design(s) do not require the seal of the Truss Designer until accepted by the Building Designer, whereupon these alternative Truss Design Drawings shall be sealed by the Truss Designer. 2.3.6.4 Truss Placement Diagram. Where required by the Construction Documents or Contract, the Truss Manufacturer shall prepare the Truss Placement Diagram that identifies the assumed location for each individually designated Truss and references the corresponding Truss Design Drawing. The Truss Placement Diagram shall be permitted to include identifying marks for other products including Structural Elements, so that they can be more easily identified by the Contractor during field erection. When the Truss Placement Diagram serves only as a guide for Truss installation and requires no engineering input, it does not require the seal of any Registered Design Professional including in cases where the Legal Requirements mandate a Registered Design Professional for buildings. 2.3.6.5 Required Documents. The Truss Manufacturer shall supply to the Contractor the Truss Submittal Package, including the Truss Design Drawings, a Truss Placement Diagram, if required by the Construction Documents or Contract, and the required Permanent Individual Truss Member Restraint location and the method to be used per Section 2.3.6.6 Special Application Conditions. The Truss Manufacturer shall be allowed to provide detail drawings to the Contractor to document special application conditions. 2.3.6.7 Truss Submittal Packages. Where required by the Construction Documents or Contract, Legal Requirements or the Building Official, the Truss Manufacturer shall provide the appropriate Truss Submittal Package to one or more of the following: Building Official; Building Designer and/or Contractor for review and/or approval per Section 2.3.4.2. 2.3.6.8 Reliance on Construction Documents. The Truss Manufacturer shall be permitted to rely on the accuracy and completeness of information furnished in the Construction Documents or otherwise furnished in writing by the Building Designer and/or Contractor. 2.3.6.9 Fabrication Tolerance. The Truss Manufacturer shall determine the value for the fabrication tolerance to be used in the design of the Trusses (see Section 6.4.10). 2.3.6.10 Manufacturer Quality Criteria. The Truss Manufacturer shall manufacture the Trusses in accordance with the final Truss Design Drawings, using the quality criteria required by this Standard unless more stringent quality criteria is provided by the Owner in writing or through the Construction Documents. 2.3.6.11 In-Plant Truss Inspections. Truss inspections, as required by the Jurisdiction, shall be performed at the manufacturer’s facility using the manufacturer’s In-Plan Quality Assurance Program monitored by an inspection agency approved by the Jurisdiction, and shall satisfy any Quality Control/quality assurance requirements for the Trusses and shall satisfy any designated in-plant special inspection requirements for the Trusses. 2.3.6.12 Responsibility Exemptions. The Truss Manufacturer is responsible for items listed in Section 2.3.6, and is not responsible for the requirements of other parties specified outside of Section 2.3.6.