However, I must clarify a few important points before providing further help:
Problem summary (concise):
Having the PDF is step one. Using it effectively is step two. Most students fail because they only read solutions; they don't write them. Reinforced Concrete Design Besavilla Pdf Nscp 2015
No official, legal PDF of an updated "Besavilla 2015" edition exists freely online. However, I must clarify a few important points
Start with a Besavilla chapter (e.g., Rectangular Beams in Flexure). Understand the derivation of the "balanced condition" and the concept of the Whitney stress block. Solve the example problems to get comfortable with the algebra. No official, legal PDF of an updated "Besavilla
When solving Besavilla problems, if the problem asks for "NSCP 2015 compliance," you must discard any "Allowable Stress" tables found in older Besavilla chapters and apply the Load Factors and Strength Reduction Factors ($\phi$) from NSCP 2015 Section 400.