# Activity 10.2 Technology – Objectives & Tools

Activity 10.2 – Technology – Objectives & Tools          Michael Nauth EDDL5101

Bloom’s Digital Taxonomy and Framing the Gable Roof

Upon completion of this unit you will be able to:-

• Identify and name the various types of roof designs and roof framing components
• Draw, layout, calculate, cut, and frame roof components for a Gable rafter roof

Remembering

• Highlight the key roof names and roof framing components in your e-text

http://www.slideshare.net/stootypal/roof-types  Slides 1 – 21, 22 – 26, Note #27 is incorrect.  Why?

http://www.slideshare.net/fullcircle/roofframing  Slides #1- 10

http://www.slideshare.net/tariqmx2/roof-1418984  Slides #7 – 27, Note # 28 & 29 are incorrect. Why?

Understanding

• Follow the links to compare roof shapes to the isosceles and the right-angled triangles
• Draw a unit roof triangle (5/12) on graph paper lines (run or horizontal side of 12, rise or vertical side of 5), draw squares on each of the 3 sides, and then cut out each square and determine the relationship of the big square to the two smaller ones
• Repeat for 7 & 12 and use the architectural scale to determine the length of the hypotenuse
• Compare your measurement to the one found using the Pythagorean theorem

http://www.slideshare.net/CRattan/isosceles-triangle-exploration?from_search=5

http://www.slideshare.net/teacherfidel/isosceles-triangles

Right-Angled Triangles and Pythagoras’ Theorem

http://learni.st/learnings/99012-pythagoras-theorem?board_id=13622

http://www.carpentry-pro-framer.com/pythagorean-theorem.html

Applying

• Follow the slideshow below to confirm your knowledge of similar triangles
• http://www.slideshare.net/wartschowk/similar-triangles-concept?from_search=7
• Apply the Pythagorean Theorem to find the hypotenuse of the total roof triangle
• Use the ratio principle of similar triangles to determine the sloped length of the roof
• Use scaled drawings, the protractor, and the speed square to determine roof rafter angles

Analyzing

• Find the rafter tables on the framing square  http://en.wikipedia.org/wiki/Steel_square
• Compare the findings on the Framing Square Tables to the calculations using Pythagoras
• Parallel your findings to the full-sized roof using the HTML below

http://www.carpentry-pro-framer.com/gable-roof-framing.html

Evaluating

• Review the slides on trig ratios à http://www.slideshare.net/guestd1dc2e/trigo-ratios
• For roof triangles, we use the Tangent ratio (#17 – 20)
• Right-angled triangles (90E),     Tangent ” =   = O/A=      Rise/Run
• Apply trigonometric ratio of tangent (rise/run) to calculate roof rafter angles (7/12 slope)

Rafter Calc

Creating (digital)