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1Level 1: Section 01 – Version 3© 2014 SBCA

Section 01: Industry Introduction

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Download & Print TTT I Sec 01 Slides

TPI 1-2007 Selection

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Changing the Construction Industry

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Introduction Outline

Early Use of Truss Concepts

Forerunners to Metal Plate Connected Wood Trusses

Truss Configurations

Applications

Advantages Framing The American Dream project

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Triangles

The power of the triangle…not a new idea.


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Early Use of the Truss Concept

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As early as 1560, trusses were used in timber bridges.

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In 1840, the Howe Truss won a U.S. patent.

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Tension & Compression

Section 02 - Terminology

Axial forces

Tension Compression

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Whipple Truss

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Whipple Truss Bridge


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The Bollman Bridge

ASCE

two 80-ft. spans

Quiz 1

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Forerunners to Metal Plate Connected Wood Trusses

Heavy Timber

Split Ring Connected

Bolt Plate Connected

Plywood Gusset

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Heavy Timber Truss

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Lumber Sizes

Section 05 – Truss Materials

Timber Nominal Thickness ≥ 5"

Board Nominal Thickness < 2"

Dimension 2" ≤ Nominal Thickness ≤ 4 1/2"

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Lumber Sizes

Nominal


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Lumber Sizes

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Heavy Timber LVL Truss

> 2′

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Heavy Timber Connections

Courtesy of Cleveland Steel Specialty

‘TECO Ring’

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Bolt Plate Connected Truss

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Exposed Trusses

Wet Lumber MC in excess of 19%

Decay of Wood Prolonged wetness

Metal Corrosion Double-Dipped Galvanized or Stainless Steel

Paint Coatings

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ANSI/TPI 1 ANSI - American National

Standards Institute

TPI - Truss Plate Institute

1- Standard Number

2007 - Year Published

TPI 1-2007 Selection Section 6.5

Commentary § 6.5


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Bolted Space Frame Truss

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Heavy Timber Truss

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Heavy Timber Truss

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Plywood Gusset

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Industry Pioneers

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Industry Pioneers


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A. Carroll Sanford

Gri-P-Late32

J. Calvin Jureit

Gang-Nail Plate

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Jack Schmitt

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Metal Plate Connected Wood Trusses

Trusses are the major engineered wood component used today $8+ billion industry 80% residential market share

Roof systems greater than 60% market share

Floor systems about 20% market share

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Metal Connector Plates

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Metal Plate Connected Truss Associations

Truss Plate Institute

Structural Building Components Association

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TPI

1961: Organized

Represents truss plate manufacturers

Purpose - maintain industry on a sound engineering basis

Technical Advisory Committee

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CMC / WTCA / SBCA

1961: The Component Manufacturers Council was established within TPI

1983: Organized as WTCA Represents structural wood component

manufacturers

Serves to promote the common interests to ensure

growth, continuity & professionalism

Develops educational materials & programs

2008: Changed name to Structural Building

Components Association42

WTCA

Mission


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www.sbcindustry.com

Quiz 2

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overall

height

span (out-to-out of bearings)

cantileverbottom chord length

panel lengthpeak

splice

heel

bearing

web

panel

point

top chord

bottom chord

slope12

overhang

wedge

truss platecontinuous lateral brace

Use the controls below to stop/restart the presentation.

Section 02 – Terminology

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Heelheight

Buttcut

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standard heelheight < 4”

compressedinsulationin this area

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raised heel


4910 ft 10 ft 10 ft

8 ft 8 ft 8 ft 8 ft

King PostQueen Post or Fan

Fink Howe30 ft.


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Truss Configurations TTB

TTBCONF-D

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Stub

Mono Pitch

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Hip

Half Hip

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Bowstring

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Attic Frame


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Inverted

Gambrel

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Scissors

Half Scissors

Pitch

Pitch/2

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Sloping Flat

Vaulted Parallel Chord

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Flat Vault

Vault

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Studio Vault

Tray or Coffer

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Cantilevered Mansard with Parapets


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Barrel Vault

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Dual Pitch

Clerestory

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Tri-Bearing

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Polynesian

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Double Cantilever

Gable End Frame

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Parallel Chord

4x2 With Mechanical Chase Opening

2x4 orientation


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cL

Quiz 3

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Applications

Residential roofs and floors

Agricultural

Commercial

Concrete forming

Remodeling

Manufactured (Industrialized) housing

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Hip Roof

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Large Opening Header

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Field Spliced Scissors Trusses


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Bracing Guidelines

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Floor Trusses & Mechanical Systems

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Floor Trusses & Girders

Section 07 – Load Development76

Cantilevered Hip Trusses

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Attic Frames

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Agricultural Trusses


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Purlin Trusses

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Truss Columns

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Commercial Buildings

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Mid-Height Bearing Trusses

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Walls & Headers

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Industrial Construction


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Concrete Formwork

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Concrete Formwork

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Top Chord Bearing Floor Trusses

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Compression Rings

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Dome Roof

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Roof Girders


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Roof Girders

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Single Bearing (Umbrella) Truss

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Complicated Roof Truss System

Quiz 4

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Advantages

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Longer Spans


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High Quality Components

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Pre-engineered

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Decreased Material Shortage Delays

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Optimize Wood Use

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Faster Installation

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Design Flexibility


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Economical

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Floor Trusses

105http://support.sbcindustry.com/structuraldetails.php

SBCA Standard Details

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Floor Truss Fact Sheet TTB

TTBFLOOR-D

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Future of Framing Brochure

TTBFUTURE-D

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Framing the American Dream™

TM


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Framing the American Dream™

Stick Frame Component

Total Hours to Construct 401 hrs. 148 hrs.

Total Hour Cost @ $20/hr. for Average FramingCrew Labor (Components used Crane @ $500)

$8,020.00 $3,460.00

Total Board Footage Lumber (Sheathing PanelsSame for Both)

20,400 bd. ft 15,100 bd. ft

Total Cost of Lumber @ $450/1000 bd. ft.(average), Sheathing @ $3748.00 (same for both)and Components at Truss Manufacturer’s SellingPrice

$12,928.00 $14,457.00

Total Lumber and Panel Scrap Generated 17 yards 4 yards

Total Scrap Cost @ $15/yd dumpster cost and 1/2hour/yd to pick up.

$425.00 $100.00

Total Cost for This Example Only $21,373.00 $18, 017.00

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What We Learned From Framing the American Dream™

FAD-D

Quiz 5

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