woodworking: the art and the craft -...

TEACHER’S GUIDE

CREATING DADO JOINTSCREATING DADO JOINTS

Woodworking: The Art and the Craft

INTRODUCTIONThis Teacher’s Guide provides information to help you get the most out of Creating DadoJoints. The contents of this guide will allow you to prepare your students before using theprogram and to present follow-up activities to reinforce the program’s key learning points.

Part of Woodworking: The Art and the Craft video series, Creating Dado Joints explainsthe uses and types of dado joints, and demonstrates how to make a through dado and arabbet and dado joint using both hand tools and power tools. Emphasis is placed on safe-ty practices related to the use of power tools for dado joints.

LEARNING OBJECTIVESAfter viewing the program, students will be able to: ■ Make a through dado joint using hand tools.■ Make a through dado joint using a router and/or a table saw with dado head.■ Glue and assemble a through dado joint.■ Make a rabbet-and-dado joint using hand tools.

EDUCATIONAL STANDARDSNational Standards This program correlates with the following competency standards from the NationalCenter for Construction Education & Research. The content has been aligned with the fol-lowing educational standards and benchmarks from this organization. ■ Explain the role that safety plays in the construction crafts.■ Demonstrate the use and care of appropriate personal protective equipment.■ Identify and cut the various types of joints used in cabinetmaking.

The competencies and objectives from the National Center for Construction Education & Research havebeen reprinted with permission.

English Language Arts StandardsThe activities in this Teacher’s Guide were created in compliance with the followingNational Standards for the English Language Arts from the National Council of Teachers ofEnglish. ■ Uses the general skills and strategies of the writing process.■ Gathers and uses information for research purposes.■ Uses strategies to adapt writing for different purposes (e.g., to explain, inform, analyze,

entertain, reflect, persuade).■ Uses reading skills and strategies to understand and interpret a variety of informational

texts.■ Uses discussions with peers as a way of understanding information.■ Uses listening and speaking strategies for different purposes.■ Makes formal presentations to the class (e.g., includes definitions for clarity; supports

main ideas using anecdotes, examples, statistics, analogies, and other evidence; usesvisual aids or technology, such as transparencies, slides, electronic media; cites informa-tion sources).

■ Uses viewing skills and strategies to understand and interpret visual media.2

Copyright © 2004 Meridian Education Corporation®

■ Uses a variety of criteria (e.g., clarity, accuracy, effectiveness, bias, relevance of facts) toevaluate informational media (e.g., web sites, documentaries, news programs).

Standards for the English Language Arts, by the International Reading Association and the National Councilof Teachers of English, Copyright 1996 by the International Reading Association and the National Council ofTeachers of English. Reprinted with permission.

Technology StandardsThe activities in this Teacher’s Guide were created in compliance with the followingNational Education Technology Standards from the National Education TechnologyStandards Project. ■ Students demonstrate a sound understanding of the nature and operation of technolo-

gy systems. ■ Students are proficient in the use of technology.■ Students use a variety of media and formats to communicate information and ideas

effectively to multiple audiences. ■ Students use technology to locate, evaluate, and collect information from a variety of

sources. ■ Students use technology tools to process data and report results. ■ Students evaluate and select new information resources and technological innovations

based on the appropriateness for specific tasks.

The National Education Technology Standards reprinted with permission from the International Society forTechnology Education.

PROGRAM OVERVIEW After explaining and showing the different types of dado joints, the host demonstrateshow to make a through dado joint using hand tools and power tools. Next, he demon-strates how to make a rabbet and dado joint using a router. He emphasizes and demon-strates the safety measures one should take when making the joints with power tools.

MAIN TOPICSTopic 1: Types of Dado JointsIllustrates the different types of dado joints, including through dado, stopped dado, rab-bet and dado joint, single-sided dovetail joint, and double-sided dovetail joint.

Topic 2: Making a Through Dado Joint Using Hand ToolsDemonstrates laying out the joint, cutting the dado edges with a chisel, cutting the dadowith a dovetail saw, removing the waste with a chisel, and finishing the dado with arouter plane. Shows the finished joint.

Topic 3: Making a Through Dado Joint Using Power ToolsShows the different power tools that can be used to make dado joints. Demonstrates cut-ting the dado with a router and with a table saw equipped with dado heads. Shows thefinished joint. Emphasizes safe practices for these power tool applications.

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Topic 4: Assembling a Through JointDemonstrates how to glue and assemble a through dado joint.

Topic 5: Making a Rabbet-and-Dado JointDemonstrates how to make a rabbet-and-dado joint using hand tools.

FAST FACTS■ Dado is pronounced day-do.■ A through dado is open on both ends.■ In a stopped dado, the groove is only visible from one end.■ A rabbet-and-dado joint is stronger than a conventional through dado due to the addi-

tion of the shoulder area provided by the rabbeted member.■ For greater strength, dado joints can be made using single-sided or double-sided dove-

tails.■ The groove can be cut out with hand tools or with several power tools, including a

table saw, radial arm saw, and router.■ When using a router, you’ll need a straight bit for cutting square grooves, or a dovetail

bit if you’re making a single-sided or double-sided dovetail.■ If groove width is greater than the width of the router bit, a second straightedge will

be required.■ Unless you’re cutting a shallow groove with the router, always adjust cutting depth

incrementally and make multiple passes.■ A dado head for the table saw consists of several chipper blades sandwiched between

a pair of circular saw blades.

VOCABULARY TERMSdado: A shallow groove cut into a panel or board that supports an adjoining member.dado head (blade) for power saw: A set of blades for the power saw that enable cut-ting a broad groove of different widths; consists of two saw blades with chippers sand-wiched between, which in different combinations make different width cuts.double-sided dovetail: A groove in which both sides have been angled outward tomake the bottom of the groove larger than the opening.stopped dado: A dado with the groove open on only one end; the groove does notextend to the other edge of the wood, and the mating piece is notched for a flush fit.rabbet-and-dado joint: A rabbet ended piece that slips into a stopped dado groove onthe supporting piece, which contains the dado. It is stronger than a through dado jointbecause the supporting piece was not grooved to the edges.single-sided dovetail: A groove in which one side has been angled outward to makethe bottom of the groove larger than the opening.through dado: A dado with the groove open on both ends.

PRE-PROGRAM DISCUSSION QUESTIONS1. What are the disadvantages of nail joints, screw joints, and rabbet joints?2. Have you ever looked at the joints in a bookcase? Describe how they are different from

nail joints, screw joints, and rabbet joints. 3. Pass around a sample rabbet and dado joint and ask, “How do you think this joint was

made? What tools would you need to make it?”4

POST-PROGRAM DISCUSSION QUESTIONS1. What are the critical steps in making dado joints? 2. When should you use a through dado joint? A stopped dado joint? A rabbet-and-dado

joint?3. What projects can you think of in which dado joints should be used? What kind of

dado joint would you use for each of these projects?4. What are the disadvantages of dado joints? 5. In what careers might the techniques demonstrated in this video be useful?

GROUP ACTIVITIESDado Joint ChartHave the class prepare a chart showing mechanical drawings of the different types ofdado joints. This activity will help them understand the differences among these joints,and also to gain skill in relating the joints to their representation in drawings.

Dado Joint SamplesHave the class prepare a display of samples of the different types of dado joints. This willhelp them understand the differences among the joints, and to gain skill in creating them.

INDIVIDUAL STUDENT PROJECTSConstruct a Bookcase with Through Dado Joints Using Hand ToolsHave individuals construct a bookcase with through dado joints. This activity will developskill at creating dado joints using hand tools. It also will develop skill at hiding theexposed ends of the through dado joint.

Construct a Bookcase with Through Dado Joints Using Power ToolsHave individuals construct a bookcase with through dado joints. This activity will developskill at creating dado joints using power tools. It also will develop skill at hiding theexposed ends of the through dado joint.

Construct a Bookcase with Rabbet-and-Dado JointsHave individuals construct a bookcase with rabbet and dado joints. This activity will devel-op skill at creating these dado joints. It also will develop skill at planning and laying outthe work so that no cuts or ends are visible.

INTERNET ACTIVITIESResearch Dado Joint ProjectsHave individuals or groups of students research possible individual or class projects involv-ing dado joints of any type feasible for their skill level. This activity will sharpen theirresearch skills as well as provide additional projects for hands-on skill development.

Research Dado Attachments for Table Saw and RouterHave individuals or groups of students research the available dado attachments for tablesaws and routers, including features and prices. Then, have them prepare a report andmake a presentation on their findings. This activity will develop their research, writing,and presentation skills, as well as provide practical information about these attachments. 5

ASSESSMENT QUESTIONSQ: What is a dado?Answer/Feedback: A dado is a shallow groove cut into a panel or board that supportsan adjoining member.

Q: A dado head for a power saw will let you make both through and stopped dados.(True or False)

A: TrueFeedback: To make a through dado, push the board all the way through the saw blade.To make a stopped dado, stop the wood before it reaches the edge. The stopped dadomust be finished with hand tools because the saw blade leaves a groove of decreasingdepth due to its circular shape.

Q: What is a rabbet-and-dado joint?Answer/Feedback: A rabbet-ended piece that slips into a stopped dado groove on thesupporting piece, which contains the dado. It is stronger than a through dado jointbecause the supporting piece was not grooved to the edges.

Q: Place the steps for making a through dado using hand tools in the correct order.(a) Continue the cutting lines a third of the way down along both edges.(b) Use a dovetail saw and cut down to the gauge marks on the edge of the

board.(c) Using a marking knife and tri-square, scribe cutting lines across the width of the

support piece.(d) Use a wide chisel to pare a shallow angular groove on the waste side of both

cutting lines to create a recess used to guide the handsaw.(e) Plow out the remaining material with a router plane.(f) Scribe a line between the marks on both edges.(g) Glue, assemble, and clamp the joint.(h) Mark the width of the groove on the supporting member using the adjoining

piece as a gauge. (i) Remove the majority of waste using the appropriate size chisel.

A: (h) Mark the width of the groove on the supporting member using the adjoining pieceas a gauge.

(c) Using a marking knife and tri-square, scribe cutting lines across the width of thesupport piece.

(a) Continue the cutting lines a third of the way down along both edges.(f) Scribe a line between the marks on both edges.(d) Use a wide chisel to pare a shallow angular groove on the waste side of both cut-

ting lines to create a recess used to guide the handsaw.(b) Use a dovetail saw and cut down to the gauge marks on the edge of the board.(i) Remove the majority of waste using the appropriate size chisel.(e) Plow out the remaining material with a router plane.(g) Glue, assemble, and clamp the joint.

Feedback: Basically, lay out the slot to match the thickness of the board to be inserted,lay out the cutting lines, cut the edges of the groove cleanly, gouge out the rest of thegroove, then glue and assemble the pieces.6

Q: Why do you use a chisel to cut the edges of the dado groove?(a) To remove surface materials and make the scribed line easier to see.(b) To create a depression in the wood that the hand saw can easily follow.(c) To cleanly cut the edges of the groove.(d) a and b(e) b and c

A: (e) b and cFeedback: Using the chisel accomplishes both making a depression for the hand saw andcleanly cutting the edges of the groove.

Q: Which of the following power tools can be used to make a dado groove? (Choose allthat apply.)

(a) Table saw(b) Band saw(c) Router(d) Lathe(e) Radial arm saw

A: (a) Table saw, (c) Router, and (e) Radial arm sawFeedback: The band saw cannot cut part way through the board. The lathe can’t cut agroove at all.

Q: Fill in the missing step for cutting a dado groove with a router. (1) Scribe the groove lines. (2) Clamp a straightedge to the work piece in the appropriate location. (3) _______________________________________________________.(4) Advance the bit into the work gradually while applying a slight lateral pressure

against the straightedge. (5) Turn the router off and wait for the bit to come to a complete stop before plac-

ing the tool down. A: Place the router on the material so that the bit is centered between the groove lines.Feedback: Be sure that the router bit is between the groove lines so that you don’t cutanywhere else.

Q: When should you use a dovetail joint?(a) When a particularly clean finish is needed.(b) When additional strength is needed.(c) When two dissimilar types of wood must be joined.(d) When you can’t use a through dado joint.(e) When there are dowels in the way.

A: (b) When additional strength is needed.Feedback: The fact that the dovetail joint is larger at the bottom than at the openingmakes it an especially strong and tight fit.

Q: In most instances when removing wood from the dado groove, you can do it in a sin-gle pass if the chisel is sharp enough. (True or False)

A: False7

Feedback: You should remove the wood in several shallow passes to avoid cutting toodeeply and to avoid accidents with the chisel.

Q: When using a router to cut a groove that is larger than the router bit diameter, set uptwo straightedges, one for each side of the groove. (True or False)

A: TrueFeedback: Setting up two straightedges keeps the router between the grooves. If you usea straightedge for only one side, you take the chance of the router slipping too far theother way and cutting beyond the groove line.

Q: When must safety glasses be worn?(a) At all times when you are operating power equipment.(b) When power equipment is running near you.(c) When others are using power equipment in the vicinity.(d) a and b.(e) a, b, and c.

A: (e) a, b, and c.Feedback: All these times present a danger to your eyes—even when equipment is notrunning or you are not the one using it.

ADDITIONAL RESOURCESWEBSITES

Woodworking.comwww.woodworking.com

New Woodworker.comwww.newwoodworker.com

Fine Woodworkingwww.taunton.com/finewoodworking/index.asp

Women in Woodworkingwww.womeninwoodworking.com

National Center for Construction Education and Researchwww.nccer.org

BOOKS

The Basics of Craftsmanship: Key Advice on Every Aspect of Woodworking (Essentials ofWoodworking), by Purdy Strother. Rodney Crosby Publishers’ Group West, 1999.ISBN: 1561582972

Tage Frid Teaches Woodworking 1&2: A Step-By-Step Guidebook to EssentialWoodworking Technique, by Tage Frid, Peter Chapman (Editor). Taunton Press, 1994.ISBN: 15615806868

Setting Up Shop: The Practical Guide to Designing and Building Your Dream Shop, bySandor Nagyszalanczy. Taunton Press, 2001. ISBN: 1561585556

Wood: Technology and Processes, by John L. Feirer and Mark D. Feirer. McGraw Hill,2002. ISBN: 007822411X

MAGAZINES

American Woodworker, F&W Publications Inc., ASIN: B00005NION

Fine Woodworking, Taunton Direct, Inc., ASIN: B000063XJH

Popular Woodworking, F&W Publications Inc., ASIN: B00005NION

Woodworkers Journal, Rockler Press, ASIN: B00005N7TN

OTHER PRODUCTSWoodworking: The Art and the Craft, VHS/DVD, Meridian EducationWoodworking: The Art and the Craft is a 15-part video series that explains and illustratesa variety of common techniques and cuts used in woodworking. While each programincludes information on the tools and safety requirements of each task, the focus of theprogram is to provide specific information on “how to” accomplish each task. The seriesincludes the following titles: Ripping and Crosscutting; Finishing Techniques; BasicMethods of Measuring and Cutting; Working with Nails and Screws; Planning; Sanding;Methods of Cutting Circles and Curves; Sawing & Shaping; Gluing & Clamping; CreatingBiscuit and Dowel Joints; Creating Rabbet Joints; Creating Dado Joints; Creating MiterJoints; Creating Mortise-and-Tenon Joints; Creating Dovetail Joints and Casework. Item no: 31970, www.meridianeducation.com, 1-800-727-5507

Careers in Construction Trades, CD-ROM, Shopware The need for qualified construction workers continues to grow. This interactive CD-ROMguides users through several occupations in the construction industry, including cementmasons, bricklayers, plumbers, pipe fitters, carpenters, and electricians. Video interviewsegments include information on the background of each job, what is expected of theemployee, qualifications, subjects in which to enroll, what the job is like, expected wages,and outlook for each job. Interactions and quiz segments appear throughout the programto help reinforce concepts and information. This is the perfect program for those interest-ed in a construction career! Windows only. Item no: 20434, www.shopware-usa.com, 1-800-257-5126

Carpenters, VHS/DVD, Cambridge Educational This fast-paced program provides a concise profile of carpenters, looking at educationalbackground, apprenticeships, salary, and the work itself.Item no: 32261, www.cambridgeeducational.com, 1-800-468-4227

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Building Basics: An Interactive Guide to the Fundamentals of Construction, CD-ROM,Shopware Learn the basics of construction in this exciting and informative CD-ROM. The programcovers all aspects of construction, from the initial planning to the steps involved in build-ing both light and heavy constructions. All construction should begin with a good plan—Section One outlines factors to consider during the planning phase, including identifyingthe purpose of the structure, its form, cost, and types of materials to use. It also intro-duces various tools used in the construction process and discusses the functions of each.Light construction methods are discussed in Section Two, using homes, small apartmentbuildings, and offices as examples. Windows only.Item no: 24232, www.shopware-usa.com, 1-800-257-5126

Building Trades Series, VHS/DVD, Meridian EducationA very comprehensive overview of the many elements needed to build a structure. Eachof the ten videos provides a look at a specific construction area and shows the workbeing performed, while explaining what’s involved in the job. Individual titles offer flexibili-ty to cover topics as needed...fits any curriculum requiring general information. The seriesincludes Blueprints: Planning a Building; Climate Control; Drywalling and InteriorTrimming; Electricity; Exterior Walls and Roof Construction; Floor and Wall Construction;Interior Finish Work; Plumbing; Site Preparation; and The Foundation. Item no: 24841, www.meridianeducation.com, 1-800-727-5507

Construction Technology, VHS/DVD, Meridian Education This five-part video series explores the world of construction technology. It provides anoverview for elements of project design, site preparation, erecting sub- and superstruc-tures, installing utilities, and enclosing, finishing, and landscaping. Using an entertainingformat, the series follows a student in the future who uses his home computer to answerquestions on a school project. The series includes Enclosing, Finishing, and LandscapingStructures; Erecting Substructures and Superstructures; Installing Utilities; Introduction toConstruction Technology; and Project Design and Site Preparation.Item no: 17674, www.meridianeducation.com, 1-800-727-5507

Introduction to Construction Technology, VHS/DVD, Meridian Education Covers basic information on construction technology, including a definition of construc-tion, the project design, types of construction, the involvement of architects in the con-struction process, zoning laws, building codes, local covenants, site preparation, substruc-ture and superstructure, building materials, installation of utilities, enclosing, and finish-ing. Item no: 25678, www.meridianeducation.com, 1-800-727-5507

Millwrights, VHS/DVD, Meridian Education This fast-paced program provides a concise profile of millwrights, looking at educationalbackground, apprenticeships, salary, and the work itself. Item no: 32270, www.meridianeducation.com, 1-800-727-5507

Residential Carpentry Framing Series, VHS/DVD, Meridian EducationA step-by-step “how-to” series of videos that will show your students how to build.

Whether working with floor, wall, ceiling, or roof framing, viewers get a first-hand look atconstruction procedures, safety issues, and proper tools. A clear explanation of each stepprovides in-depth information, while viewers watch actual carpenters do the work.“Notes” are given throughout, offering tips and safety warnings. The series includesResidential Ceiling Framing; Residential Floor Framing; Residential Roof Framing; andResidential Wall Framing. Item no: 26204, www.meridianeducation.com, 1-800-727-5507

Tour of the Trades, VHS/DVD, Meridian EducationThe construction industry is big business, involving hundreds of professions and specialtyareas. This program offers a fast-paced survey of the skilled construction trades, providinga sense of the diversity of jobs available, as well as comparing the wages of constructiontrades to other industries. Along with dozens of scenes from construction projects on avariety of scales, apprentices and journeyman workers discuss what they enjoy about theirtrade and how they got started. Item no: 32258, www.meridianeducation.com, 1-800-727-5507

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