Lesson Plan
Course Title: Flexible Manufacturing
Session Title: Fastening Metal
Performance Objective:
After completing this lesson, the students will be able to identify different types of welding
symbols and sheet metal seams, and demonstrate they will be able to produce four basic sheet
metal seams using either sheet metal or index cards that match the criteria in the Common
Sheet Metal Seam Identification Project/Rubric.
Specific Objectives:
 Explain the basics of the American Welding Society welding symbols.
 Identify six sheet metal seams (lap seam; inside corner lap seam; outside corner lap
seam; standing groove seam; single bottom seam; and countersunk seam).
 Demonstrate they can produce four to six basic sheet metal seams.
 Create a presentation board of their sheet metal seams.
Preparation
TEKS Correlations:
This lesson, as published, correlates to the following TEKS. Any changes/alterations to the
activities may result in the elimination of any or all of the TEKS listed.
Flexible Manufacturing:

130.327(c)(3)(B)
…appraise...welding symbols;

130.327(c)(11)(B)
…construct common sheet metal seams.
Interdisciplinary Correlations:
Algebra I:

111.32(b)(2)(C)
…interpret situations in terms of given graphs or creates situations that fit given graphs;

111.32(b)(3)(A)
…use symbols to represent unknowns and variables;
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Occupational Correlation (reference: O*Net – (www.onetonline.org):
Sheet Metal Worker 47-2211.00
Similar Job Titles: Sheet Metal Mechanic, Sheet Metal Worker, Journeyman Sheet Metal
Worker, HVAC Sheet Metal Installer
Tasks:
 Lay out, measure, and mark dimensions and reference lines on material, such as
roofing panels, according to drawings or templates, using calculators, scribes, dividers,
squares, and rulers.

Fasten seams or joints together with welds, bolts, cement, rivets, solder, caulks, metal
drive clips, or bonds to assemble components into products or to repair sheet metal
items.

Install assemblies, such as flashing, pipes, tubes, heating and air conditioning ducts,
furnace casings, rain gutters, or downspouts in supportive frameworks.

Convert blueprints into shop drawings to be followed in the construction or assembly of
sheet metal products.
Soft Skills:
Active Listening, Critical Thinking; Reading Comprehension; Judgment and Decision Making
Teacher Preparation:
The teacher needs to review the Fastening Metal presentation. The teacher will need to
purchase sheet metal for the seams and cut it to a basic size of 6” X 12”, or have 12 index
cards for each student. The teacher could purchase and cut the poster board in an
11” X
14” size for the presentation boards. The teacher will need to have the three handouts
reproduced for the students: Welding Symbols, Common Sheet Metal Seam Identification, and
Common Sheet Metal Seam Identification Project/Rubric.
References:
American Welding Society
• http://www.aws.org/technical/errata/A2.4errata.pdf
Instructional Aids:
1. Fastening Metal presentation
2. Welding Symbols handout
3. Common Sheet Metal Seam Identification answer key
4. Common Sheet Metal Seam Identification Project/Rubric
Materials Needed:
1. Welding Symbols handout for each student
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2.
3.
4.
5.
6.
7.
Common Sheet Metal Seam Identification handout for each student
Common Sheet Metal Seam Identification Project/Rubric for each student
Pencil or pen
Paper
6” x 12” piece of 26 gauge sheet metal for each student
11” X 14” piece of poster board for each student
Equipment Needed:
1. Computer
2. Data Projector
3. Box and Pan Brake or a Bar Folder
4. Hand Seamer
5. Sheet Metal Groover
Learner Preparation:
Understanding of basic measurement. The student should have passed a safety test over the
sheet metal tools, and have a parent permission form turned in.
Introduction (LSI Quadrant I):
ASK: Does anyone know how to fasten metal parts together?
SHOW: Welding beads and sheet metal seams
SAY: These are products made in the flexible manufacturing class.
SAY: The planning of a metal project may include how to fasten the parts together.
SAY: For this lesson you will have to produce 4 to 6 different seams.
Outline
Outline (LSI Quadrant II):
Instructors can use the presentation, slides, handouts, and note pages in conjunction with the
following outline.
MI
Outline
Notes to Instructor
I. Welding Symbols
A. Information
B. Basic welding symbols
C. Table of basic welding symbols
D. Basic welding symbol references
E. Welding symbols handout
Begin Fastening Metal
presentation.
Slides 1-9
The teacher will need to
explain welding plans.
Distribute the Welding
Symbols handout and
allow time for students to
complete.
II. Construct Common Sheet Metal Seams
A. Six sheet metal seams
Slides 10-19
The teacher will explain
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.
B.
C.
D.
E.
F.
G.
a. Lap seam
b. Inside corner lap seam
c. Outside corner lap seam
d. Standing groove seam
e. Single bottom seam
f. Countersunk seam
Definition and basic lap seam
Two lap corner seam
Standing groove seam
A seam groover
Single bottom seam
Countersunk seam
III. Common Sheet Metal Seam Identification
Project/Rubric
A. Students will develop six different seams
B. Poster presentation of seams
C. Project will match criteria in rubric
Verbal
Linguistic
Logical
Mathematical
Visual
Spatial
Musical
Rhythmic
Bodily
Kinesthetic
Intrapersonal
the six basic seams used
in sheet metal production.
Distribute the Common
Sheet Metal Seam
Identification handout
and allow time for the
students to complete.
Slide 20
American Welding
Society resource
Distribute the Common
Sheet Metal Seam
Identification
Project/Rubric handout.
Students will develop the
six different seams, using
a piece of 6” X 12” sheet
metal, or 12 index cards.
Allow the students to fold
the seams using the
equipment and tools in
the lab. They will develop
a poster presentation
with the seams mounted
on a piece of poster
board 11” X 14” and
attach the rubric to the
back of the poster
presentation to turn in
for a grade.
Interpersonal
Naturalist
Existentialist
Application
Guided Practice (LSI Quadrant III):
The students will have the Common Sheet Metal Seam Identification handout to refer to during
the construction of the seams.
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Independent Practice (LSI Quadrant III):
The students will complete the Welding Symbols handout and the Common Sheet Metal Seam
Identification handout. They will complete the Common Sheet Metal Seam Identification
Project/Rubric and form the different types of seams; and develop a poster with the seams
labeled; and attach rubric for a grade.
Summary
Review (LSI Quadrants I and IV):
Question: What would you use a seam for in producing a product from sheet metal?
Answer: This is a way of connecting two pieces of metal together or forming a joint.
Question: Why is it necessary to understand the welding symbols?
Answer: The welding symbols explain how to place the welds for the most strength of
the product.
Evaluation
Informal Assessment (LSI Quadrant III):
The students will be graded on classroom activities during the forming of the seams.
Formal Assessment (LSI Quadrant III, IV):
The Common Sheet Metal Seam Identification Project/Rubric and the seam poster will be
turned in for a grade.
Extension
Extension/Enrichment (LSI Quadrant IV):
The student could research other seams used in sheet metal production. This research could
be presented to the class for an extra grade.
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Name _________________________________________ Date _______________ Period ______
Welding Symbols
Define Reference Line __________________________
Define Arrow ________________________________
Draw the basic welding symbols in the blanks below.
Butt or Groove
Bead
Fillet
Plug or
Slot
Build up
on
surface
Build up
in corner
Build up
in hole
Square
V
Bevel
U
J
Edges
left
square
Both
edges
cut to an
angle
One
edge cut
to an
angle
Both
edges
cut to a
concave
One
edge cut
to a
concave
Complete the welding symbols below.
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Welding Symbols Key
Define Reference Line is a horizontal line where all
welding information is placed.
Define Arrow is the other required part of the symbol.
It points to the location of the weld.
Draw the basic welding symbols in the blanks below.
Butt or Groove
Bead
Fillet
Plug or
Slot
Build up
on
surface
Build up
in corner
Build up
in hole
Square
V
Bevel
U
J
Edges
left
square
Both
edges
cut to an
angle
One
edge cut
to an
angle
Both
edges
cut to a
concave
One
edge cut
to a
concave
Complete the welding symbols below.
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Name _________________________________________Date _______________ Period ______
Common Sheet Metal Seam
Identification
Write the name of each seam and tell if it is self locking or not.
1.
2.
3.
5.
4.
6.
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Common Sheet Metal Seam
Identification Key
1. Inside Corner Lap Seam - No Lock
2. Single Bottom Seam - Locked
.
3. Countersunk Seam - Locked
4. Lap Seam - No Lock
5. Outside Corner Seam - No Lock
6. Standing Groove Seam - Locked
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Name ________________________________Date _______________ Period ______
Common Sheet Metal Seam
Identification Project/Rubric
The student will produce 4 to 6 sheet metal seams illustrated. The seams will be made from
pieces of sheet metal cut to 2” by 3” in size, or 12 index cards. The seams will be ½” in width.
The seams that are not self-locking will need to be resistance (spot) welded, pop riveted or held
together with double stick tape. The seams should be turned in mounted on a piece of poster
board 11” X 14”. The presentation should have your name and the seams labeled on it. You will
need to answer the statements below and then attach the rubrics to the back of your
presentation. The seams will be turned in and be graded using the included rubrics.
Grading Rubrics
Statement
Number Number
Number of non
locked seams
Number of locked
seams
Correct size in seam:
3” X 5” with ½” seam
5 points per seam
Seams are fastened,
non locked welded, riveted or
taped.
Appearance:
Do the seams look well
formed?
Presentation:
Seams are mounted on a
holder and labeled.
Total
10 points max
Student
Teacher
10 points per seam
10 points max
15 points max
20 points max
Add points to get grade
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