General Instructions. In problems requiring the specification of sizes for steel cable,...

General Instructions. In problems requiring the specification of sizes for steel cable, bar, or pipe, selections should be made from Tables 3.1–3.3. In all problems, write a brief technical report following the guidelines of Appendix A, where you summarize all pertinent information in a well-organized fashion. It should be written using proper, simple English that is easy for another engineer to read. Where appropriate, sketches, along with critical dimensions, should be included. Discuss the objectives and constraints considered in your design, the process used to arrive at your final design, safety issues if appropriate, and so on. The main discussion should be typed, and figures, if needed, can be computer-drawn or neatly hand-drawn. Include a neat copy of all supporting calculations in an appendix that you can refer to in the main discussion of your report. A length of a few pages, plus appendix, should be sufficient.

A company is designing an aftermarket hoist to be installed on a pickup truck. Thus, the dimensions of the hoist have largely been determined by the available space inside the bed of the truck. The hoist consists of two pipes, AC and AD, and two cables, AE and FABA. The hoist is to be capable of lifting a maximum of 4000 lb. You are to specify

The diameter of the steel wire rope FABA;

The diameter of steel wire rope AE;

The diameter of steel pipes AC and AD;

The torque rating for the winch F (equal to the force cable

FABA supports multiplied by 6 in.).

In your calculations, you may assume cable segments AB are vertical, and the bed of the truck is horizontal. Although the hoist is to be designed for a maximum load of 4000 lb, surely some user will attempt to lift more. Discuss in your report the consequences of doing this and how your specifications account for this possibility.