Exercise 7 - Callie
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JOHN BROWN UNIVERSITY
DIVISION OF ENGINEERING AND CONSTRUCTION MANAGEMENT
CM 2213 – CONSTRUCTION METHODS ONE – RESIDENTIAL METHODS
This exercise is due at the beginning of the next lab period.
EXERCISE 7 (15 pts)
N a m e : C a l l i e E r t e l _ _ _ _ _ _
This lab takes the place of the LATCO WOOD TRUSS
site visit.
Watch the following videos and then summarize at least 3 important points in each for me to review. By turning this lab in you are certifying to me that you watched each video in its entirety. How to Design a Roof Truss (2:50)
http://www.youtube.com/watch?v=DKq9xDVMYmk
The design meets the local building code before beginning the roof truss work.
Trusses ends linked at nodes, in triangle shape and will not alter form.
Steel is more durable than wood, but it is more expensive.
M Street Homes - Framing 1 Walls and Roof Trusses Production (6:36)
http://www.youtube.com/watch?v=wZOUW95dghY
Engineer has “seal of approval” behind product.
Once design is complete it goes to production and is fed through the saw and assembled.
They cut new trees not old trees, for a greener choice.
Fort Worth Lumber Rafters Trusses Design And Build (2:41)
http://www.youtube.com/watch?v=-LxfIwOPPxE
Once the pieces are cut by a factory machine, they use nail guns.
They manually use a nail gun through the plate.
The process was done by men working on the trusses instead of more engineered production lines.
Roof Truss Basics - Structural Engineering And Home Building Tips (6:21)
http://www.youtube.com/watch?v=1OIJQyZ3YIw
Roof truss “engineered roof system”. Structural component of home.
Roof trusses cannot be cut in specific areas.
You cannot move the specific beams/walls supporting the truss.
Keymark's Truss Software.mov (2:44)
http://www.youtube.com/watch?v=LTDuIDfkh5Y
video not available
AutoSet C4 - Jigging System (5:37)
http://www.youtube.com/watch?v=wUIEEBf3B5c
1988 is when the AutoSet C4 was created.
Operator controls all of the movements.
Loads truss design files from engineer software.
All trusses are built with a single eel stop, no additional jigging is necessary.
Safe erection of roof trusses (27:19)
http://www.youtube.com/watch?v=v0SCkxWgPck
A balance between speed and safety, the code provides a happy medium.
Everyone erecting trusses must go through training beforehand.
The safety standard suggests to assess the worksite.
The risk of falling is ever present and must be addressed.
To be safe all of the time everyone must be trained, qualified, and consulted.
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