How do I find the Phi factor (safety factor) in ACI 318 reinforced concrete design?

[@kaungsetlinn9667]

i am a civil engineer from Myanmar(Burma). your explanation can be understand easily.

[@hamzamMR]

thank you Dr tyler !!. i just can't wait for the next one .

[@TaponChakrabarti]

Great Lines ...You've told.

[@TylerLey]

Thanks!

[@visuallydesigned]

Very informative video!, but 1 thing you didn't cover is:
In case your section comes out to be in the transition zone and thus phi is a bit less than 0.9, which is the better approach (economically, logically and best-practice wise)?
a) calculate new phi, and repeat design using it (so your beam won't be pure tension controlled)
b) add a bit compression steel to reduce the value of a, and thus reducing C, so that the strain increases

[@TylerLey]

Thanks for the comment and additional discussion.

[@harrytuttle4069]

thank you!

[@TylerLey]

Thank you!