A) How manyN12/ N20bars will be required to make ku= 0.355and whatwill be its corresponding Mu? Which bar will be your preference and why?
B)For the under-reinforced design in ( c ), assuming the beam is constructed in Brisbane, determine thstress in steel byassuming Ms= 0.45M*, in which M* = φMu.Comment if the stress in steel complies with Cl.8.6.1 of AS3600(2009). Determine the crack width and crack spacing corresponding to the service ability moment
C) Determine the long term deflection at mid span of the beam in ( cand d) under the serviceability moment Ms. specified in (d).
If the span of the beam is 5m and is required to satisfy a deflection limit of span/320, comment on its acceptability as a serviceable beam