Chapter 4 - Design Concepts

Objectives Course objective:  To understand the difference between applied loads and allowable loads and how to calculate (or apply) factor of safety. Learning objectives: Recognize the difference between applied loads and allowable loads (1.05). Apply the concept of factor-of-safety to problems from chapters 1-3. Sum moments around one axis (1.07). Sum forces and moments (0.97). Calculate stresses (1.03). Sum forces and moments and calculate stresses (0.94). Compare answers from different loading scenarios and select the best/safest answer (0.98). The values in orange represent quiz performance.  One represents average.  Values greater than one represent easier topics.  Values less than one represent harder topics.

Concepts  (9 minutes) 1. design issues video notes     - construction mistakes notes     - Pittsburgh pin connections notes     - logging equipment notes     - boat traffic notes     - bridge rod snaps notes     - bridge hunter notes 2. allowable stresses and loads video notes 3. homework solution steps video notes 4. homework strategies video

Problems  (27 minutes) assigned 3e 2e 1e aids WP format   safety factors --   04.001   04.001 04.001 -- --   --   --   --   04.002* 04.002 strategy solution   --     yes   04.002   --   --   --   --   TENU     yes   04.003   04.003* 04.003 video solution   TENU   --   --   04.004* 04.004 video solution   --     yes   04.004   --   --   --   --   TENU     --   04.005   04.005* 04.005 strategy solution   TENU   yes   04.006   04.006* 04.006 strategy solution   GO     --   --   04.007* 04.007 -- solution   --     yes   04.007   --   --   --   --   TENU   yes   04.008   04.008 04.008 strategy solution   TENU   --   04.009   04.009* 04.009 strategy solution   --   yes   --   04.010* 04.010 video solution   GO B14     --   04.010   --   --   --   --   TENU     --   --   04.011* 04.011 strategy solution   TENU B15   yes   --   04.012* 04.012 strategy solution   TENU B16   --   04.011   04.013* 04.013 -- --   --   --   --   -- 04.014 video solution   --     --   04.012   --   --   --   --   --       --   --   04.014   --   --   --   TENU B 17       --   04.013   04.015   --   --   --   TENU     --   04.014   04.016 04.015 -- solution   TENU   --   04.015   04.017+ 04.016 strategy solution   TENU   --   04.016   04.018 04.017 -- --   TENU   LRFD --   04.017   04.019 04.018 -- solution   --   --   04.018   04.020 04.019 -- --   --   --   04.019   04.021 04.020 -- solution   --   --   04.020   04.022 04.021 -- --   -- * numbers changed between first and second editions + problem statement changed between first and second editions props