1	Objective Design the lightest bridge capable of supporting a given load over a given span using a given material.
2	Design Criteria Min. Span = 300mm Max. Span = 400mm Min. Width = 50mm Max. Width = 100mm Max. Superstructure Height = none Max. Substructure Dimension Below Roadbed = 70mm
3	Roadbed There is no need to have a solid roadbed. Roadbed must support a 150mm L x 40mm W x 17mm H wood block in the center of the bridge span. Wood block is part of the testing apparatus. Roadbed must have an opening in the center of the span to allow a 3/8” diameter bolt to pass up through the roadbed from underneath. The bolt is part of the testing apparatus.
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5	Bridge Testing Apparatus
6	Bridge Testing Apparatus
7	Bridge Testing Apparatus
8	Materials popsicle sticks ONLY White or Yellow Wood Glue Unlimited Lamination (No particle board or commercially laminated wood)
9	Test Procedure Bridge will be: inspected for design criteria weighed inserted into test device stressed with a load until failure.
10	Bridge Efficiency Failure Weight (lbs. converted to grams) divided by Bridge Weight (grams) Keep your bridge design light in weight as possible! The lighter the bridge, the higher the score. The greater the failure weight, the higher the score.
11	Classic Truss Designs
12	King Post
13	6 Panal Pratt
14	6 Panal Howe
15	Fan
16	Fink
17	Belgian
18	Scissors
19	Scissors Modified
20	Scissor modified
21	Shed
22	Sawtooth
23	Bow String
24	Pratt parallel Chord
25	Howe Parallel Chord
26	Warren
27	Three Hinged Arch
28	Barn Truss
29	Good Luck! See you at the bridge building contest!