This material may not bereproduced without permissionHelter Skelter - PDF document

rev. 10/2012 ��This material may not bereproduced without permissionHelter Skelter ShelterScenario rev. 10/2012 ��This material may not bereproduced without permissionSTUDENT ACTIVITY NOTESHelter Skelter ShelterThe problemThe aim of this activity is to design and construct a tower to hold as many weights as possible, in both static (no vibration) and dynamic (earth quake) conditions. Your team’s towermust be between 20 and 100cmhighInitially astatic test will be conducted where points will be awarded for the height of the tower and the weight it can support. Later adynamic test will conducted where your team has to nominate the number ofweights theythink theirtower can support whilst being shaken.DurationThis activity runs for ahalf day (approximately 2 hours). TermsThere are some terms used in this activity that you may not be familiar with: Seismic load Loads produced during the seismic (ground vibration) movements of an earthquake. Beam A structural member, usually horiz ontal, whose main function is to carry loads acrossits length . These loads usually result in bending of the beam. Column A column is a main vertical member that carries axial loads from the main roof beams or girders to the foundation alongits lengthhese loads usually result in squashingof the column MaterialsYour team will be given a rectangular mounting board incorporating a number of protruding bolts. This is used as the foundation for each of your towerYour team will only be given A4 paper, plastic drinking straws, masking tape and a Styrofoam tray to build the towers. You cannot use any other materials.RulesThe Styrofoam tray holds the test weights; it must be at the top of the tower.The tower must be between and 100cm high. The height of your tower is measured from the top of the mounting board to the bottom of the tray.You must not use excessive amounts of masking tape. You are not allowed to fill the tower with balls of paper.You are responsible for placing the test weightsontoyour tower, and loading your tower into the Earthquake simulator.Do not lean on the test table whilst the vibration testing is being conducted.Materials from the prototype tower cannot be used in the final construction. rev. 10/2012 ��This material may not bereproduced without permission ScoringAfter the initial briefing, teams are allowed30 minutes to build a prototype tower. This toweris subjected to a static test only andis used to try out your designfor the dynamic testAt the end of the prototyping phase the event staff will keep your initial construction and estock your team’s materials. Note that you cannot use any materials that were leftover from the prototype tower in the final construction.The finaltower is constructed during the next 30 minutes. the end of the sessionthe finaltowerfrom each teawill besubjected to the dynamictest.Each test scores points for theteam. Pretest:easure the height of the towerhe height of the tower from the underside of the Styrofoam tray to the top of the mounting boarddetermines the maximum points available for each of the following tests. Static load testThe firsttest is to place as many weightsas possible (without breaking the tower) in the Styrofoam tray at the top of the tower.The greater the load it take, the more points your team receives. Seismic load testThe final test subjects your team’s tower to a seismic vibration. You nominate the number of weightsyou think your tower can support without failing. If it survives this load, you may specify more weightsfor a second seismic test. ote that points are awarded for the maximum number of weightssupported WITHOUT breaking. No points are awarded if your tower fails the first seismic test. The judge’s decision about what constitutes a failure is final.Tipson’t forget to bring these notes with you to the ChallengeThe prototyping phase is the opportunity to try using normal materials in abnormal ways. For example, there are lots ofdifferent ways paper can be used to make strong structural members.Don’t just think of it as a flat sheeOne of the most challenging aspects of this activity is the fact that there is a very limited range and quantity of materials; be careful not waste them ashey won’t be restocked. rev. 10/2012 ��This material may not bereproduced without permissionThis page is intentionally blank so that the score sheet prints on a new page. rev. 102012 ��This material may not bereproduced without permissionSCORE SHEETHelter Skelter ShelterSchool name: _________________________________________AM Pretest:Height to underside of the top Styrofoam tray: _______ cmStatic eight estTrack down the appropriate weight column in the tablebelow. Tick the cell if the tower survives the test. Place a large cross in the cell when the tower fails. Height ( c m) 20 30 40 50 60 70 80 90 100 Number of w eights 1 100 200 300 400 500 600 700 800 900 2 12 0 220 320 420 520 620 720 820 920 3 140 240 340 440 540 640 740 840 940 4 160 260 360 460 560 660 760 860 960 5 180 280 380 480 580 680 780 880 980 6 200 300 400 500 600 700 800 900 1000 Buster 1 260 360 460 560 660 760 860 960 1060 Buster 2 360 460 560 660 760 860 960 1060 1200 Static core _________Pretest:Height to underside of the top Styrofoam tray: _______ cmSeismic Each team has2 attempts to support the most weight possible without tower failure. Each teammust nominate the number of weights theythink theirtower will take. Height ( c m) 20 30 40 50 60 70 80 90 100 Number of w eights 1 200 300 400 500 600 700 800 900 1000 2 220 320 420 520 620 720 820 920 1020 3 240 340 440 540 640 740 840 940 1040 4 260 360 460 560 660 760 860 960 1060 5 280 380 480 580 680 780 880 980 1080 6 300 400 500 600 700 800 900 1000 1100 Buster 1 360 460 560 660 760 860 960 1060 1160 Buster 2 460 560 660 760 860 960 1060 1160 1300 Seismic core_________(B)Minus500 point penalty if the tower 20cm or　 100cm high _________(C)FINAL SCORE= A + B _______________ circle one