10. Developments

Class: Technical Graphics - Year 2

Learning Intentions and Success Criteria

Date Week beginning:

Learning Intention

You will know you can do this because you will be able to:

Draw the development of rectangular based prisms

Draw the development of regular based prisms

Draw the development of a cylinder using generators

Draw the development of irregular prisms/containers

Draw the development of a number of 3 dimensional objects including planner and curved surfaces

At the end of these lessons you will: Success Criteria

Be able to draw the unfolded surface of three dimensional objects (known as a development).

Project Developments of irregular shaped objects

Develop curved surface

Textbook References:

JCTG: Junior Certificate Technical Graphics (O’Callaghan)

UTG: Understanding Technical Graphics (O’Sullivan)

WS: Worksheets

Specialist equipment required for class

• HB, H and 2H pencil

• Pencil sharpener, eraser

• Colouring pencils

• 45, 30 and 60 degree set-squares

• Compass

• Drawing clips or masking tape

• A3 Folder

• Textbook: Understanding Technical Graphics

• iPad

Equipment required at home

• T-square

• Drawing Board

• Internet connection and access to SharePoint

Keywords

Development
Envelope
Elevation
Surface
Hexagon and hexagonal
Rectangular
Irregular
Equilateral
Prism
Triangular
Truncated
Cylinder and cylindrical
Pyramid
Dimensional
Generators
Project
Extreme
Indicate
Quadrant

Scheme for this topic

Regular Prisms

Read the instructions on pages 84, 85, 86 and 88 of the textbook to learn what developments are.
Draw the elevation and plan of a rectangular prism then its development (Exercise 1, p87)
Draw the elevation and plan of a hexagonal prism then its development (Exercise 2, p87)
Draw the elevation, plan and end view of an cut box then its development (Exercise 1, p89)
Draw the elevation, plan and end view of an cut box then its development (Exercise 2, p89)
Draw the elevation, plan and end view of an box then its development (Exercise 4, p90)
Read how to develop a curved surface on page 91
Draw the elevation and plan of a cylinder and project its development (Exercise 1, p92)
Draw the elevation, plan and end view of a curved container and project its development (Exercise 4, p93)

Sheet 1

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 1: DEVELOPMENTS 1: BARRY TEA BOX and the date
Examine the measurements of the Barrys Tea box, Quesiton 1, page 84. You will use a scale of 2:1, so divide all measurements by 2.
Measure 140mm vertically and draw a light line 1/3 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the box, 20mm beyond the end of the plan

Sheet 2

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 2: DEVELOPMENTS 2: SCOTS CLAN BOX and the date
Examine the measurements of the Scots clan box, Quesiton 1, page 86
Measure 110mm vertically and draw a light line 1/4 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the box, 50mm beyond the end of the plan

Sheet 3

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 3: DEVELOPMENTS 3; BAND-AID BOX and the date
Examine the measurements of the Band-ad box, Quesiton 1, page 87
Measure 130mm vertically and draw a light line 1/4 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the box, 40mm beyond the end of the plan

Sheet 4

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 4: DEVELOPMENTS 4; AMICELLI BOX and the date
Examine the measurements of the Amicelli box, Quesiton 2, page 87
Measure 180mm vertically and draw a light line 1/4 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the box, 20mm beyond the end of the plan (Project across from your plan)

Sheet 5

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 5: DEVELOPMENTS 5; WALNUT WHIP BOX and the date
Examine the measurements of the Wallnut whip box, Quesiton 3, page 87
Measure 160mm vertically and draw a light line 1/3 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Measure 35mm vertically up from the top of the Title Box, draw a light construction line across the page.
Measure in 125mm along this line. This point is the bottom left of a triangle that will form your development.

Sheet 6

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 6: DEVELOPMENTS 6; DISK BOX and the date
Examine the measurements of the Disk box, Quesiton 1, page 89
Measure 140mm vertically and draw a light line 1/4 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation looking in direction A
Complete the Elevation, then draw the Plan 10mm beneath the Elevation
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the back of the box, 70mm beyond the end of the Elevation (Project across from your Elevation)

Sheet 7

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 7: DEVELOPMENTS 6; BIRO BOX and the date
Examine the measurements of the Biro box, Quesiton 2 page 89
Measure 130mm vertically and draw a light line 1/3 of the way across the page (This is your base line, xy)
Measure 20 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation looking in direction A
Complete the Elevation, then draw the End Elevation 10mm beside the Elevation, looking from direction B
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the back of the box, 70mm beyond the end of the End Elevation (Project across from your Elevation)

Sheet 8

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 8: DEVELOPMENTS 8; LITTER BOX and the date
Examine the measurements of the Litter box, Quesiton 2 page 89
Measure 130mm vertically and draw a light line 1/3 of the way across the page (This is your base line, xy)
Measure 100 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation looking in direction A
Complete the Elevation, then draw the End Elevation 10mm beside the Elevation, looking from direction B
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the back of the box, 60mm beyond the Elevation (Project across from your Elevation)

Sheet 9

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 9: DEVELOPMENTS 9; INDEX BOX and the date
Examine the measurements of the Index box, Quesiton 5 page 89
Measure 160mm vertically and draw a light line 1/3 of the way across the page (This is your base line, xy)
Measure 10 mm horizontally and draw a light line vertically with your Set-square. This is the bottom left corner of the elevation looking in direction A
Complete the Elevation, then draw the End Elevation 10mm beside the Elevation, looking from direction B
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Measure 90mm vertically up from the top of the Title Box, draw a light construction line across the page.
Measure in 230mm along this line. This point is the bottom left of the back of the b that will form your development.

Sheet 10

Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 10: DEVELOPMENTS 10; PRINGLES BOX and the date
Examine the instructions on page 91 to indicate what you will do
Examine the measurements of the Pringles box on page 92
Measure 70mm vertically and draw a light line 1/4 of the way across the page
Measure 60 mm horizontally and draw a light line vertically with your Set-square. This is the centre of the circle that forms the plan of the container
Using your 60/30 degree Set-square, mark off 12 increments around the circle (similar to the times on a clock)
Project up the extreme left and extreme right points (3 and 9) upwards to for the elevation
Draw a horizontal construction line 10mm above the plan, this is your base line xy
Measure up a further 85mm to complete the Elevation
Measure 20mm to the right of the Elevation to begin the Development of the container
Your completed drawing should be similar to the diagram at the bottom of page 91 (It doesn't matter where the two circles are drawn)

Sheet 11 (ON YOUR OWN!)

Working on your own or with a partner complete this drawing yourself
Line out the sheet with the 10mm margin and title block at the bottom (10mm (construction line), 5mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 10: DEVELOPMENTS 11; BIN and the date
Examine the measurements of the BIN in question 2 on page 92
Measure 50mm vertically and draw a light line 1/4 of the way across the page
Measure 60 mm horizontally and draw a light line vertically with your Set-square. This is the centre of the semi-circle that forms the plan of the bin
Using your 60/30 degree Set-square, mark off 6 increments around the semi-circle
Project up the extreme left and extreme right points (3 and 9) upwards to for the elevation
Draw a horizontal construction line 10mm above the plan, this is your base line xy
Measure up a further 75mm to complete the Elevation
Measure 20mm to the right of the Elevation to begin the Development of the container

Sheet 12

Line out the sheet with the 10 mm margin and title block at the bottom (10 mm (construction line), 5 mm (construction line) and 10 mm (Heavy line) from the margin )
Fill in your name, SHEET 12: DEVELOPMENTS 12; HERRING FILLETS and the date
Examine the measurements of the Herring container in question 3 on page 92
Measure 180 mm vertically and draw a light line 1/3 of the way across the page, this will contain the centre line for the plan of the container
Measure 40 mm horizontally and draw a light line vertically with your Set-square. This is the centre of the first semi-circle that forms the plan of the container
Complete the plan using the measurements in question 3 on page 92
Using your 60/30 degree Set-square, mark off 6 increments around the circle (similar to the times on a clock)
Project up the extreme left and extreme right points (3 and 9) upwards to for the elevation
Draw a horizontal construction line 10 mm above the plan, this is your base line xy
Measure up a further 15 mm to complete the Elevation looking in direction A
Measure 40m m vertically up from the top of the Title Box, draw a light construction line across the page. This is the centre-line of the first semi-circle that forms the plan of the container
Measure in 100 mm along this line. This is the centre of the first semi-circle that forms the plan of the container
Complete the development from this base

Sheet 13 (Working with a partner)

Line out the sheet with the 10mm margin and title block at the bottom (10 mm (construction line), 5 mm (construction line) and 10mm (Heavy line) from the margin )
Fill in your name, SHEET 12: DEVELOPMENTS 13; WALL CONTAINER and the date
Examine the measurements of the container in question 4 on page 93
Measure 160 mm vertically and draw a light line 1/4 of the way across the page, this will contain the centre line for the quadrant shown in the container. You should draw the End Elevation first.
Measure 40 mm horizontally and draw a light line vertically with your Set-square. This is the centre of the arc that forms the End Elevation of the container
Complete the End Elevation using the measurements in question 4 on page 93
Using your 60/30 degree Set-square, mark off 4 increments around the arc
Project up the heights from your End Elevation to form the Front Elevation
Measure a further 10 mm beyond the End Elevation, this will give you the bottom left corner point of the Elevation looking in direction A
Count the number of surfaces and sketch out what the development may look like on the bottom corner of the sheet
Begin the Development of the back of the container, 50mm beyond the Elevation (Project the back across from your Elevation)

Homework

Bring two examples of containers to school that can be easily unfolded to demonstrate development/envelopment .
Complete the envelopment exercise sheet Envelopment
Print and make two containers using the templates below

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