1 ENGG1802 Assignment 1 Due by 5:00pm Friday 18 October 2013 (10%) ? You MUST complete these assignment questions independently. ? When you submit your assignment, a statement page with your signature must be attached to show that “This is my own work which I was independently completing”. ? Your assignment MUST be in a manila folder or it will not be marked. ? Do not forget writing your student name and SID clearly. ? You must write the tutorial group code you belong to including the name of your tutor (check these from the course website). Otherwise, a significant delay of returning your marked assignment may occur. ? You should hand in your assignment to your tutor OR ? If you are in Stream 1, the assignment is to be submitted to the Assignment box, Level 2 of the Civil Eng. Building. ? If you are in Stream 2, the assignment is to be put in the Assignment box, Level 3 of the Mechanical Eng. building. ? NOTE: Late submissions will be penalized 10% of full mark for every day or part thereof that the assignment is late. This assignment should take an average student no more than 12 hours to complete.
2 Question 1 (25%): A crane shown below consists of 2 trusses pivoting at G under the action of a cable J-K-L-M-N (dashed) to lift a load W supported at point E. Frictionless pulleys at K, L and M all have a radius of 0.1m. With the crane in the position shown, the cable is horizontal between attachment point J and the bottom of the pulley at K, and also between the top of the pulleys at L and M. The cable travels vertically from the side of the pulley at M to the fixed point on the ground, N. The cable can support a maximum tension of 40.00kN. Members forming the stand A-B-D-H-G-C, along with braces A-D, C-D and D-G can support a maximum tension load of 162.0kN before failing by fracturing, and a maximum compression load of kN where l is the length of the member, before failing by buckling. All other members can support a maximum tension load of 81.00kN, and a…