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Popsicle Stick Bridge
Safeerah Zainabon 5 February 2013
Transcript of Popsicle Stick Bridge
Bridge A bridge is a structure that provides a passage over a gap of area. It spans over physical obstacles such as bodies of water, valleys or roads. Today, the designs of bridges are dependent on the purpose or function of the bridge and where the bridge is being constructed. Some of the types of bridges that are commonly used today are: Beam Bridges
Arch Bridges Beam
Bridge The Popsicle stick bridges that we have created as a team are models of a simple truss bridge. A truss bridge is a bridge that is supported by trusses. Trusses are a framework of numerous triangles and in our case a framework of isosceles triangles. These triangular sections which are built in the trusses help to increase the structural durability and strength. Isosceles Triangles like these were built on each of the trusses. Isosceles triangles have
two equal sides. Isosceles triangles also have
two equal angles. Bridge
Teams Roles Our group members had specific roles to play throughout the creation of the bridges. In my group Sammy was the Quality Control Manager. Sonjaa was the Fabricator Manager. Sasi and I were communicators and Austin was the fabricator. I also played the role of a fabricator.
As a team we worked together to create our bridges. Asking and giving advice to one another. Quality Assurance Manager Communication Manager Fabricator Manager Fabricator Our bridges were created using various materials including jigs and required specific steps to be built. Materials: Wooden Popsicle Sticks 4.5" long x 0.38" Carpenters Glue Binder Clips Tie Members Jigs (Dummy) Filer Screwdriver Sandpaper Trapezoid Towel Paper (for cleaning up) These were the resources and materials that we used to create a truss bridge. The bridges that we made were not given to us because they were what we were to learn in this unit but taught us how the design process is used to apply the concepts of technology to social and economic problems or situations. Design Process The design process is a series of steps that transfer the knowledge you already have and applies it into the real world. Such as the knowledge of forces or stability.
It helps to resovle a problem through a number of steps. 1. Defining Our Goal: Our goal is to individually create a Popsicle Stick Bridge that is 18 inches long and when connected to other bridges will be able to withstand a load of 150 pounds. When creating the bridges, we must use a minimum amount of materials or resources. In the end we must create the world's longest, strongest and lightest popsicle stick bridge.
Process More truss types.... Types of Trusses 2. Investigate, analyse,
and understand: Trusses today are designed in many ways. Some truss types can be flat. Others can be designed in a scissor shape and some have a slope in only one direction, which make them mono. The purpose of making the bridges was to create a secure and reliable structure that would be safe for people to use. Not only should bridges be able to withstand our load but the environments affects too. 2. Process 1. Input 3. Output 4. Evalutate What is our Problem that
we need to solve? Our problem is to create a truss bridge that will be
able to hold 150 lbs. What resources and
we provided with? We are provided with sets of documents
packed with information for us to analyze and understand. We are given a blue print of the actual
truss bridge that we are to design and are provided with all the materials that are necessary
to build the bridge physically. Processes We investigated and analysed through the documents that were created for this assignment. We analysed the blue print and procedures to get an understanding on how the bridge should be created. To expand our understanding we also
watched videos related to our topic. After investigating and analysing, we thought of ideas on how we could make our bridge tough and strong and aesthetically pleasing.
The best solution to constructing our bridge was to follow the blue print that we were provided with in class so that our model of the bridge would be accurate. We followed the correct procedures and made sure that the materials we used were in their best condition like the Popsicle sticks. 3. Choose the Best Solution: We planned out our materials and planned how we were going to create this bridge. We also listed the procedures to create each part of the bridge. 4. Plan & design: After planning and choosing the best solution, we will form the world’s strongest and lightest Popsicle stick bridge. 5. Construct: Output My output is two documents and one
prezi presentation. The structures I built
while creating the truss bridge were:
3 Top and Bottom Stringers
And the final product was the Truss Bridge Evaluate: The evalutation is based on the design process. The input, which are the materials and resources. The processes, which is the creation and the planning and the output which are the documents and bridge. Step 1 The first step to making a truss bridge out of popsicle sticks is by creating stringers. 6 Stringers are needed in total. 3 top stringers and 3 bottom stringers. Top stringer is made out of 3 popsicles stick on one side and 2 symmetrically glued on the other side.
Bottom Stringer is made up of 4 Popsicle sticks on one side and 3 on the other. -Use a dummy and place it onto a Popsicle stick. Make sure the dummy is clamped onto the end of the starting of the stick. The gap that you are leaving is the area for the next Popsicle stick.
-Use a binder clip to hold the dummy in place.
-Spread glue on to the uncovered side. Make sure that you cover the whole area with glue
-Then take a second Popsicle stick and stick it onto the glue. Make sure that both Popsicle sticks align and clean of the glue that oozes out.
-If the glue does not ooze out it means there is not enough glue or you are not applying enough pressure onto the two popsicles.
-You can hold the popsicles for a few seconds or use a binder clip to apply pressure onto the sticks.
-After putting on the binder clip take of the dummy.
-Now apply glue on the uncovered area of the second popsicle stick
-Keep doing this until you have 3 sticks on one side and 2 sticks symmetrically overlapped on the other side. The bottom stringer follows the same rules and remember popsicle sticks on opposite sides must overlap by exactly half of their length. Make sure you have 3 top stringers and 3 bottom stringers. Step 2 Truss Perimeter: The truss perimeter is the one top stringer and one bottom stringer plus two diagonals on the left and right side. To attach the diagonals use the trapezoid or the blue print. -Place one top and bottom stringer on to the screws that are coming out of the trapezoid on both horizontal sides.
-On the smaller side, place the top stringer and on the longer side, place the bottom stringer.
-For the top stringer, the three sticks side must face up
-For the bottom stringer the four sticks side must face up
-Make sure that the middle points of the sticks are matched up with the middle of the trapezoid template.
-Tighten the screw and find two Popsicle sticks that are of course in good shape.
-Use a ruler or the blueprint to make sure that the space between the stringers is 3.500”
-Glue the two Popsicle sticks on the sides of the diagonal. First glue the top of the stick then the bottom.
-Use binder clips to hold the sticks in place.
-Do the same for each set of a top and bottom stringer.
-In the end you will have three perimeters. Bottom Stringer Top Stringer Perimeter Step 3 Create the trusses by using the blue print and ruler. -Put the first perimeter on the blue print and make sure it is properly aligned to match the diagram on the sheet.
-Find eight Popsicle sticks and match them also onto the blueprint. They will make nine isosceles triangle.
-Make sure you are leaving a ¼” gap between the tips of the isosceles triangle.
-Glue the top and bottom ends of the stick one by one and stick them on to the top and bottom stringer according to the diagram and your measurements.
- Use binder clips to apply pressure on the glue
- In the end you will have 9 isosceles triangles.
- You can also double all your diagonals, so on the other side of the truss, glue on popsicle stick according to the sticks on the finished side and the blue print and make sure they match.
- Do this to all three perimeters. and use binder clips.
-Make sure that any glue that oozes out must be wiped by a paper towel, so that it does not dry on Popsicle sticks outside. Your product needs to be aesthetically pleasing. Step 4 Attach Tie members: The tie members will put your three trusses together. - You need 6 tie members. Three for the top and three for the bottom.
- The tie members will go in between the gaps of the three middle isosceles triangles that’s points are facing the top stringers.
- Start with the top tie members. You need to place the tie member exactly between the gap of the two Popsicle ends.
- File the tie members if they do not fit onto the stringer.
- After filing place glue into the three areas that are going to be attached to the stringer and make sure you do not connect the tie member from the top but from the bottom.
- Do this for the next two gaps and then for the bottom gaps.
- Make sure that the top stringer tie members match up with the bottom tie member.
- Wipe any glue that oozes out. Tie Members Step 5 Add the extra two diagonals across the tie members. - One Popsicle stick goes from top right to bottom left of the tie members and on the opposite side, the second stick goes from top left to bottom right.
- Do this to the next two tie members
- Use binder clips to provide pressure
- Wipe off any excess glue. File or sand of any unnecessary edges of popsicles that are sticking, that should not be. Step 6 Fabrication The quality assurance manager checks and tests all the teams parts and structures and ensures that teams trusses meet high standard of construction. They will also point out errors. He or she communicates with the teacher. They also help to keep the team on track.
A quality assurance manager completes a daily log and design process, creates his/her prezi and fabricates his or her own bridge. As a group communicator, I talk to the members about the design process, materials, and other procedures the group has to follow in order
to complete the bridge. We talk about the problems the members are facing, and help to find solutions to the problems. As a communicator, we also communicate the goal to our group members so they keep in mind the purpose of our project.
They also keep a record of documents and process over 10 days, create a prezi, records in daily log and design process log. Fabricating Manager ensures all equipment is provided for the team, ensures the group is on track and organized and helps to find faster and efficient ways for the group to work.
They design there own truss bridge, create prezi and record daily log and design process log. The fabricator fabricates the components in a systematized way. They create there own truss bridge, record in there daily log and daily process log and create a prezi. They also help find solutions to groups problems YouTube Video A truss bridges trusses spreads around the forces of compression and tension which gives the bridge an equal weight distribution.
The weight is balanced throughout the whole bridge. No one part is holding more load than the other. Two forces that affect every bridge are compression and tension. Compression is a force that shortens the object it is acting on. It is the force of push. Tension is the force of stretching. It acts to expand or lengthen. Successful and
Not Successful After completing this assignment, I thought that just learning how the design process is used in real life situations was the biggest success. The design process is actually like a machine in which you put in the materials and your product comes out on the other end but even though we ended up creating a product, we still have room for improvement. As a group we did not coordinate well enough. We were not 100% aware of our roles, so therefore the assignment felt a little individual.
Also, before creating the bridge we should have sat down with our group and should have created a plan, a procedure we could follow. However, I think we lacked a little bit in group teamwork and planning.
Our bridges in the end were able to withstand many loads like our own load. Many of us were able to stand on our bridges. Thank you for watching!!!! A Beam Bridge is a rigid horizontal structure that is supported by pillars or piers
The weight of the beam pushes down onto the pillars or piers. An arch bridge is made of a curved arch
shape. It relies on this curved arch shape for support because it transfers its load to this shape. A suspension bridge
uses cables in its design. The deck is hung under the cables.
The cables are the component that help transfer the forces to the towers.