Garage Truss - 8-11 tech ed

Grade Level: 
High School
Technology Education, STEM
Lesson Overview:
To develop skills with framing and roof/truss design, teams of two students will design and construct a single stall garage model with a single gable roof from precut and scaled pine boards and ¾” wire brads.
Garage Constraints:
  • Only use 1 base-12”X12”X3/4” plywood.
  • Must have one two-car garage door framed opening.
  • Must also include two windows and one entry door.
  • Gable must be a minimum 5/12 pitch with truss rafters.
  • Every item must be scaled down from actual products use 1’=1”. 
  1. Identify the main components of a wall frame and roof rafter/truss.
  2. Identify common materials used for wall and ceiling framing.
  3. Describe various techniques and tools utilized in wall framing and construction roof trusses.
  4. Demonstrate the proper layout and construction of wall sections containing various common elements, i.e.. windows, doors, etc.
  5.  List and describe the various types of roofs.
  6. Utilizing appropriate tools, demonstrate the proper layout of common rafters.
  7. Demonstrate proper techniques in construction of a roof.
Time Required:

Projected Timeline: 2 Weeks (based on block 90min every other day)


Day 1
Introduction to framing presentation. (This would follow after a discussion and lesson on foundations).
         Introduce Garage Building Activity
         Students Divide into teams and begin designing garage
Day 2
         Check student’s initial sketches and initial design book.
         Begin final design drawing
         Start Building Garages
Days 3-5
         Continue Bridge Garages
Day 6
         Finish Garages
         Collect Student Design Books
         Follow-Up Activity
Materials Needed:
  • Claw Hammer
  • ¾” Wire Brads
  • ¾” Plywood
  • 3/8” Pine Strips at least 8” long
  • 1/8” hardboard (simulate plywood for sheathing)
  • Scrap Roofing shingles
  • Circular Saw/Table Saw
  • Band Saw
Skills/knowledge gained by learners:
  1. Identifies talents/skills within team and delegate responsibilities. Allocate amounts of each material. Develop timelines for project completion.
  2. Brainstorm garage designs. Identify roles and tasks. 
  3. Teams will evaluate the different materials available for garage construction.
  4. Teams will monitor changes in garage roof trusses with changes in temperature and humidity. They will develop alternate roof truss plans to add stability to garage model.
  5. Teams will use a variety of technology including a calculator, ruler, band saw, table saw, belt sander, drill press, hammer, nail set, various hand tools.
  • Create a scaled drawing of the garage model using graph paper. Submit a drawing for each side of the garage and one showing a completed roof truss.
  • Use a copy of the drawing as a template for constructing the actual garage.
  • Create a design book, which will include initial sketches, final drawings, and daily entries.
  • Construct a single stall garage model with a single gable roof from precut and scaled pine boards and ¾” wire brads
Closure (How to draw the project to a close):
Students will be required to visit 3 local buildings. Have them photograph and then describe three items about each building. First they must determine the architectural type of building (i.e. Victorian, Shaker, Colonial, etc). Second they must sketch the roof of the building and determine what type of roof it has (i.e. gable, hip, flat, etc). And thirdly they must determine whether or not the building design would be feasible to incorporate into future garage designs.
Evaluate each garage according to expected outcomes. If the garage were completed properly than you would assume that students have learned the required material.
Chapter Questions/Quiz _______/50
Garage Drawing _______/50
Final Garage Construction _______/150
Design Book _______/50
Total Points Possible 300
Final Garage Construction_______/150
     Degree of Completeness     ________/50
     Proper Scale          ________/50
     Quality of Build          ________/50
Design Book ________/50
Your team will be required to maintain a daily journal of the garage design and construction. At the end of the project this will be submitted as part of the project grade. The journal will be made up of the following sections:
·       Cover
·       Initial sketches
You will conceptualize your design and prepare a quality sketch of your garage. This will be the concept you develop to completion. Any changes to your garage will have to be sketched and documented.
·       Daily Entries
Every day keep track of your progress. Your entries must be made in the following form.
-       Date:
Tasks Accomplished
Tasks yet to be addressed
Standards Addressed:
The National Academy of Sciences Standards:
           1.0 Science Inquiry
1.1  Ability necessary to do scientific inquiry
1.2  Understandings about scientific inquiry
2.0 Physical Science
          2.2 Structure and properties of matter
          2.4 Motions and forces
4.0 Science and Technology
          4.1 Abilities of technological design
5.0 Science in Personal and Social Perspectives
          5.6 Science and technology in local, national, and global challenges
The National Council of Teachers of Mathematics Standards:
3.0 Geometry and Spatial Sense
          3.1 Analyze characteristics and properties of two- and three-dimensional geometric objects
          3.4 Use visualization and spatial reasoning to solve problems both within and outside of mathematics
4.0 Measurement
          4.1 Understand attributes, units, and systems of measurements
          6.0 Problem Solving
                   6.1 Build new mathematical knowledge through their work with problems
                   6.2 Develop a disposition to formulate, represent, abstract, and generalize in situations within and outside mathematics
                   6.4 Monitor and reflect on their mathematical thinking in solving problems
9.0 Connections
                   9.3 Recognize, use, and learn about mathematics in contexts outside of mathematics
International Technology Education Association Standards:
1.0  The Nature of Technology
1.2  Students will develop an understanding of the core concepts of technology.
1.3  Students will develop an understanding of the relationships among technologies and connections
between technology and other fields of study.
2.0  Technology and Society
2.2  Students will develop an understanding of the effects of technology on the environment.
3.0  Design
3.1  Students will develop an understanding of the attributes of design.    
3.2  Students will develop an understanding of engineering design.
4.0  Abilities for a Technological World
4.2  Students will develop the abilities to use and maintain technological products and systems.
4.3  Students will develop the abilities to assess the impact of products and systems.
5.0  The Designed World
5.7  Students will develop an understanding of and be able to select and use construction technologies.
Modern Carpentry, Wagner & Smith, 2000. (Textbook, workbook, and resource binder)
ITEA Standards for Technological Literacy
Created by: Steve Rogers, Walker Career Center