| Instructions for the ACEC's "Invisible World" Video |
POPSICLE STICK TRUSS BRIDGE
Instructions By John Christiansen,
8th grader, Powell MS, Littleton, CO
Graphics By Ken Loontjer, Neujahr and Gorman, Inc., Denver, CO
PURPOSE: To build a bridge spanning twelve inches that will hold 50 lbs. The bridge is to be made of only popsicle sticks and glue.
- 114 straight popsicle sticks
- 2 or 3 heavy books
- Glue - school or wood glue is best
- Rubber bands or small clamps (orthodontic bands are great!)
- Saw/sandpaper - a dremel tool works also
|1) || |
Select 9 of the sticks, break one in half and lay 3 against a ruler. Glue them together, forming a beam 3 popsicle sticks thick and 3 long. Clamp or rubber band it together and allow to dry.
Repeat step 1 three more times - you should have 4 beams
|2) || |
Select 6 of the sticks, break one in half and lay two against a ruler. Glue them together, forming a beam 3 sticks thick and 2 long. Clamp or rubber band it and allow to dry.
Repeat step 2 - you should have 2 beams.
|3) || |
Select 12 sticks and two beams - a long and a short one. Lay them on a table with the flat part of the beams down. Glue 6 sticks on top in a triangular pattern. Then glue 6 on the underside in the same fashion. Press with books.
Repeat step 3 - you should have 2 walls.
|4) || |
Sand or cut the extra off of the walls
|5) || |
Lay the 2 remaining beams on a table. Glue 33 popsicle sticks onto them, forming the road.
Press with books.
|6) || |
Glue the 2 walls at a right angle onto the road.
Hold the walls in place until the glue sets.
|7) || |
Glue crossbeams on top of the walls. You will use a total of 9 sticks. Allow to dry.
|8) || |
Smear extra glue on the joint between the wall and the road. This will reinforce the joint.
Allow to dry, and YOURE DONE!