bridge building assignment 1.work with a partner to construct 1 bridge. 2.last module partner....
TRANSCRIPT
![Page 1: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/1.jpg)
BRIDGE BUILDING ASSIGNMENT
1. Work with a partner to construct 1 bridge.2. Last Module Partner.3. Draw a full size truss pattern from one of the
six truss examples.4. Construct the bridge using balsa wood.5. Test the efficiency & applied force of the
bridge.
![Page 2: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/2.jpg)
BRIDGE SPECIFICATIONS• Work as a team to design and construct a balsa wood bridge.• You may use no more than 7 - 24”x1/8” balsa sticks. (14 ft.
total)• The bridge must have two identical trusses & a roadbed• The bridge must be exactly 10” in length.• The test block must fit between the two trusses.• No excessive glue blobs.• Support weight = Over 50 lbs.• Tape may only be used to hold pieces while glue dries.• Only two pieces of balsa wood may be laminated together.
![Page 3: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/3.jpg)
EXAMPLES OF TRUSS BRIDGES
![Page 4: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/4.jpg)
UNDERNEATH DECK TRUSS
![Page 5: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/5.jpg)
THROUGH TRUSS
![Page 6: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/6.jpg)
TRIANGULAR TRUSS
![Page 7: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/7.jpg)
K TRUSS
![Page 8: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/8.jpg)
WARREN TRUSS WITH VERTICAL SUPPORTS
![Page 9: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/9.jpg)
BALTIMORE TRUSS
![Page 10: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/10.jpg)
BALSA BRIDGE CONSTRUCTION
Two trusses must be stand vertically. ____ pts. (20) No excessive glue blobs. ____ pts. (20) Tight joints. ____ pts. (20) Roadbed & top pieces do not over hang trusses. ____ pts. (20) Over 50 lbs. = 20 pts. 40 – 49 lbs. = 15 pts. Below 40 lbs. = 10 pts. ____ pts. (20)
____ pts. (100)
BRIDGES GRADESHEET
TRUSS VIEW DRAWING GRADE
Lines are drawn with ruler. No wavy lines ____ pts. (20) Lines are 1/8” thick. ____ pts. (20)Drawing should have neat appearance. ____ pts. (20) Joints are clearly drawn. ____ pts. (20) Complete wood usage calculations. ____ pts. (20)
____ pts. (100)
![Page 11: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/11.jpg)
TRUSS BRIDGE
The truss bridge...consists of an assembly of triangles. Truss bridges are commonly made from a series of straight, steel bars.
![Page 12: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/12.jpg)
WATER
RIG
HT A
BU
TM
EN
T
LEFT
AB
UTM
EN
T SPAN
ROADBED
BRIDGE TERMS
SUBSTRUCTUREBELOW ROADBED
SUPERSTRUCTUREABOVE ROADBED
![Page 13: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/13.jpg)
1
2
3
10981 2 3 4 5 6 70
0
1
10981 2 3 4 5 6 70
Warren Truss with Vertical Supports
1
2
3
10981 2 3 4 5 6 70
Baltimore Truss
0
1
10981 2 3 4 5 6 70
K Truss
1
2
3
10981 2 3 4 5 6 70
Through Truss
0
1
10981 2 3 4 5 6 70
Triangular Truss
Underneath Deck Truss
TRUSS EXAMPLES
![Page 14: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/14.jpg)
EXAMPLES OF JOINTS USED IN BALSA BRIDGE BUILDING
![Page 15: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/15.jpg)
![Page 16: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/16.jpg)
WATER
3
2
1
0
1
980 1 2 3 4 5 6 7 10
Total inches for vertical pieces in.+
Total inches for horizontal pieces in.+
Total inches for diagonal pieces in.
=
Total inches for one truss 12 = # of feet to build one truss (round to the tenth place)
x 2
= # of feet to build two trusses (round to the tenths place)
Wood Usage Calculations: GRADING PROCEDURE
Lines are drawn with ruler (no wavy lines)
Lines are 1/8” thick.
Appearance of drawing (Easy to read)
Complete wood usage calculations.
Joints are clearly drawn. GRID SIZE = .25
DO NOT SHADE IN THE LINES!
TRUSS VIEW Drawn by: __________________________________ Block #_____ Date: ____________
![Page 17: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/17.jpg)
WATER
3
2
1
0
1
980 1 2 3 4 5 6 7 10
Total inches for vertical pieces in.+
Total inches for horizontal pieces in.+
Total inches for diagonal pieces in.
=
Total inches for one truss 12 = # of feet to build one truss (round to the tenth place)
x 2
= # of feet to build two trusses (round to the tenths place)
Wood Usage Calculations: GRADING PROCEDURE
Lines are drawn with ruler (no wavy lines)
Lines are 1/8” thick.
Appearance of drawing (Easy to read)
Complete wood usage calculations.
Joints are clearly drawn. GRID SIZE = .25
DO NOT SHADE IN THE LINES!
TRUSS VIEW Drawn by: __________________________________ Block #_____ Date: ____________
Bad jointGood joint
![Page 18: BRIDGE BUILDING ASSIGNMENT 1.Work with a partner to construct 1 bridge. 2.Last Module Partner. 3.Draw a full size truss pattern from one of the six truss](https://reader038.vdocuments.us/reader038/viewer/2022102900/55163af2550346a2308b640d/html5/thumbnails/18.jpg)
WATER
3
2
1
0
1
980 1 2 3 4 5 6 7 10
Total inches for vertical pieces in.+
Total inches for horizontal pieces in.+
Total inches for diagonal pieces in.
=
Total inches for one truss 12 = # of feet to build one truss (round to the tenth place)
x 2
= # of feet to build two trusses (round to the tenths place)
Wood Usage Calculations:GRADING PROCEDURE
Lines are drawn with ruler (no wavy lines)
Lines are 1/8” thick.
Appearance of drawing (Easy to read)
Complete wood usage calculations.
Joints are clearly drawn. GRID SIZE = .25
TRUSS VIEW Drawn by: __________________________________ Block #_____ Date: ____________
10”
8.25”
2.25
” 2.25”2.75
”
2.75
”2.75”
2.75”2” 2”2”2” 2”
10
18.25
15.5043.75 3.6
7.2