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Guidelines for Using Metal PlateGuidelines for Using Metal Plate Connected Wood Trusses in N R id ti l B ildiNon-Residential Buildings

Jim Vogt PE Archie LandremanJim Vogt PE Archie LandremanWoodworks Technical Director

North Central Region

Objectives

Introduce MPC Wood TrussesShow Practical Applications of MPC Wood TrussesProvide Recommendations for Specifying Ordering and Using MPCSpecifying, Ordering and Using MPC Wood TrussesView Job Site Examples

Goal of Webinar

Assist Design Professionals, Builders, Owners, Code Officials, Resellers and Others in the use of Wood Trusses in Non-Residential Buildings

Wood Truss DefinitionAn individual structural member manufactured by the truss manufacturermanufactured by the truss manufacturer to be used in floor and roof systems designed by others.designed by others.

Truss Configurations

Truss Configurations

The following examples represent some of the possible variations on pthese two basic types of trusses.

Th l li it t th d i iThe only limit to the design is your imagination!

Two Basic TypesPitched or common truss is characterized by its triangular shape. y g p

Two Basic Types

Parallel chord or flat truss

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Plated Floor Truss

Truss Configurations

ScissorsStudio Vault

Vaulted Parallel Chord Tray or Coffer

Flat Va ltFlat Vault Barrel Vault

Truss Configurations

BowstringTri-Bearing

Gambrel Double Cantilever

PolynesianRoom-In-Attic

Truss Configurations

Half Hipp

Mono

Cantilevered Mansard W/ Parapets

Sloping Flat

W/ Parapets

Hipp

Half Scissors

21ClerestoryDual Pitch

Parallel Chord Scissors Truss Truss Configurations

M lti PiMulti-Piece

Double Inverted

Why Use Wood Trusses?Designed using sophisticated engineering programsManufactured in a controlled environmentExtremely accurate framing method Truss to truss connections designed Capable of long floor and roof spansCapable of long floor and roof spansEfficient use of wood fiberLean design by using wider on center spacingLean design by using wider on center spacingFaster rough in timeAllow for flexibility of mechanical designy gAbility to design for specific load conditionsEconomicalWood is a “Green” building material

Connections

Component connections are designed

Girder Truss Supporting Roof and Floor Girder Truss Supporting Girder Truss

Roofs and Floors – Long Spans Riding Arena

82’ Clear Span AG Trusses 82’ Clear Span Roof Truss

Four Story Hampton Inn 28’ Clear Span Floor Truss

Wood is Green

• Wood is renewable and recyclable• U.S. is not dependent on old-growth forests. Wood

fiber comes from carefully managed forestsG f• Growing forest is a carbon dioxide sink and oxygen generator

• Engineered wood is resource efficient• Engineered wood is resource efficient• Wood and wood design rate well in Life Cycle

AssessmentsAssessments • Wood is a thermally superior building material• Wood Trusses use less wood than stick framingg

Preliminary Design Considerations

Economical - Will trusses save time or money?Available Local truss plant?Available - Local truss plant?Lead time – Can I wait for trusses?M f t i R t i ti H i ht L th?Manufacturing Restrictions – Height – Length?Shipping and Job Site Access - VerifyS i l L d C di i R iSpecial Load Conditions – ReviewCarpenter comfortable installing trusses?

Logical (Ideal) Design/Build Process

1.Owner hires a design team to undertake the architectural and structural designthe architectural and structural design

2. The structural design team decides to use trusses and involves the trussuse trusses and involves the truss manufacturer during the project design phasephase

Logical (Ideal) Design/Build Process

3 The tr sses are designed per the loading3. The trusses are designed per the loading requirements provided by the building designerdesigner

4. The completed truss design drawings are provided to the building designer who takes this information and designs the transfer of loads to the structure below.

Logical (Ideal) Design/Build Process

5 Contractor takes the completed set of5. Contractor takes the completed set of plans and builds the building

6 The building official performs an6. The building official performs an inspection to ensure that all involved in the project have not missed a detail thatthe project have not missed a detail that needed to be installed

Design Process RecommendationsInvolve a local truss manufacturerSpecify wood trusses on the plan and specsProvide detailed information in construction documentsObtain competitive bids Thoroughly review truss quotesAsk questionsRequest input from carpenter/framerRequest references from a manufacturerChoose a truss manufacturer

Required Plan InformationAdequate supporting structureAssumed lateral bracing of top chordDesign Loads including magnitude, direction and location must be provided by building designerSpecial loads such as mechanicals sprinklers foldingSpecial loads such as mechanicals, sprinklers, folding partitions etc. must be provided by building designerPlan sections and details that impact truss design must be provided by the building designer i.e. slopes, fascia and soffit details, window heightsIdeally frame to frame dimensions should be shownIdeally frame to frame dimensions should be shownSpecial requirements such as mechanical chases in trusses or web alignment must be provided

Ordering TrussesSign contract or purchase orderDiscuss lead times for shop drawingsp gHow long from final approval to delivery to siteProvide complete set of latest architectural, p ,structural, mechanical plans and specificationsProvide all pertinent specificationsp pProvide project address and directionsDiscuss how truss approval will proceedpp pAre sealed truss design drawings requiredHow many copies needed for submittalHow many copies needed for submittal

Contract

The standard contract that the Truss Manufacturer enters is withTruss Manufacturer enters is with the Owner or Contractor for the individual trussesindividual trusses

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Truss ApprovalsBuilding Designer or Owner must provide truss approval to Truss ManufacturerPlacement diagram and individual truss drawings should be reviewedField dimensions should be verified - contractorArchitect, engineer, general contractor, carpenter contractor, and mechanical contractors may all be involved in truss review.If t t i ti it til ll tiIf you are not certain question it until all parties are satisfied

Truss Manufacturer ResponsibilitiesObtain the truss design criteria from the Construction DocumentsCommunicate design criteria to Truss DesignerPrepare Truss Placement Diagram (TPD) where req ired b the Contractrequired by the ContractProvide Truss Submittal Package Sealed TDDs prepared by the TDE (if required)TPD (if required)prepared by the TDE (if required)TPD (if required) Permanent Individual Truss Member Restraint requirementsManufacture trusses in accordance with approved TDDs using quality criteria per ANSI/TPI 1

Truss Designer Responsibilities

Prepare Truss Design DrawingsPrepare Truss Design Drawings that conform to ANSI/TPI 1Responsible only for the TrussPrepare repair designsPrepare repair designsNOT responsible for specifying design loads for Trusses

45

Design Responsibilities

ANSI/TPI 1-2007 Chapter 2

ANSI/TPI1

Reference Standard in IBC and IRC for the design, manufacture and quality assurance ofdesign, manufacture and quality assurance of MPCWTs

2002 edition is referenced in the 2003 and 2006 editions of the IBC and IRC

2007 edition is referenced in the 2009 edition of the IBC and IRC

Standard Design Responsibilities Site and Roof Plan

Truss Placement Diagram Different Styles of Placement Plans

Not engineeredAn interpretation of Building Plansg

Truss Design DrawingsAll comply with IBC 2303.4.1 on truss design drawings

Storage, Handling, Installing & Bracing

Truss Designers and Manufacturers are NOTResponsible

Typically the Contractor is responsible to install in accordance with:in accordance with:Construction Documents and/or T S b itt l P kTruss Submittal Package

BCSI

For information on: Jobsite storageJobsite storageTruss handlingT b iTemporary bracingFall protectionConstruction loading

Contents of BCSIB1 H dli I t lli R t i iB1 – Handling, Installing, Restraining

& BracingB2 – Installation & Temporary

R t i t/B iRestraint/BracingB3 – Permanent Restraint/

Bracing of Chords & WebsCB4 – Construction Loading

B5 – Damage, Modifications and Errors

B7 – Temporary Restraint/Bracing for Parallel Chord Trusses

B8 – Toe-nailed ConnectionsB9 – Multi-Ply GirdersB10 – Post Frame Truss Installation

& Temporary Restraint/Bracingp y gB11 – Fall Protection & Trusses

Replacement of Dome Roof

24” Deep Floor Trusses and Flush LVL Four Story Hampton Inn

Four Story Hampton Inn Pre-Fab Floor Truss Panels

Prefab Floor Truss Panels Installing Floor Truss Panel Section

Hilton Garden Inn Milwaukee Hilton Garden Inn Milwaukee

Hilton Garden Inn Milwaukee

Office Building Elgin

Keys to Successful Component Projects

Detailed Construction Documents including Blueprint and SpecificationsBlueprint and SpecificationsPartner with a Component ManufacturerWork Closely with Knowledgeable TradesWork Closely with Knowledgeable TradesThoroughly Review Drawings and Product Information Provided by the ComponentInformation Provided by the Component Manufacturer Provide Sufficient Lead Times for ProductionStrive for Clear and Continuous Communication between Owner, GC, Design gProfessionals, Carpenter and Manufacturer

Metal Plate Connected Wood Truss Handbook Commentary for Permanent Bracing

DSB-89

DSB-89: Recommended Design Specification for Temporary Bracing of Metal Plate Connected Wood Trusses

Available on TPI Web Site:http://www tpinst org/publication-dsb-http://www.tpinst.org/publication-dsb-89.html

Wood Truss Specifications

Section 061753 Shop Fabricated WoodSection 061753 Shop Fabricated Wood TrussesA il bl SBCA W b SitAvailable on SBCA Web SiteDirect Link:

http://www.sbcindustry.com/images/trussdfspecs.pdf

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Online Courses on Structural BuildingStructural Building Component Issues

Courses cover:BCSI: Storage, Handling, Installing Restraining &Installing, Restraining & BracingPermanent BracinggFire PerformanceTruss DesignBuilding Codes

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Additional Points for DiscussionDamaged trussesTruss repairsJob site inspectionAnchors and tie downsFloor truss chases and web alignmentBracinggOverloaded trussesCutting, drilling, notchingg, g, gHeel heights

We’re here to answer your We re here to answer your questions.

WoodWorks!Archie Landreman

262-672-4746archie@woodworks.org

www.woodworks.org