The 1.6 and 1.2 is used to calculate the total distributed load w. So if a question was specifically asking for the dead load (D) and live load (L) we would have to account for those factors. For example in this case the equation would look like this - w = 1.2D + 1.6L ----- 6.912 kip/ft = 1.2D+1.6L . From there we can either solve for the dead load D or the live load L. In summary, the problem statement might ask us to find either the distributed load (w), dead load (D), or live load (L). Hope this helps.
![[Part 1] รักมาไม่ทันตั้งตัว❤ หนุ่มสาวโสดถูกจับมาแต่งงานกันกะทันหัน แถมเธอยังเป็นหัวหน้าของเขา?!](http://i.ytimg.com/vi/y2pOOMkuFI0/mqdefault.jpg)
Great explanation!
Thank you Mina!
Why don't you have to use an LRFD factor (1.6 or 1.2) with your wL^2/8? . I get confused when u have to use it for some problems but not others.
The 1.6 and 1.2 is used to calculate the total distributed load w. So if a question was specifically asking for the dead load (D) and live load (L) we would have to account for those factors. For example in this case the equation would look like this - w = 1.2D + 1.6L ----- 6.912 kip/ft = 1.2D+1.6L . From there we can either solve for the dead load D or the live load L. In summary, the problem statement might ask us to find either the distributed load (w), dead load (D), or live load (L). Hope this helps.
Isn’t there a chart to get the max moment ?
Yeah, the moment and deflection tables in mechanics of materials section
@@directhubfeexam what length would you use if you use the chart? 25' is not on the chart