Structural Design and Construction · Lesson 20 of 27

Deflection and Crack Control of RC

Compute the cracking moment Mcr from the modulus of rupture, build the effective moment of inertia Ie with Branson's equation, get immediate deflection from Ec and Ie, scale it for sustained load with lambda_delta = xi / (1 + 50 rho'), meet minimum thickness to skip the check, and cap bar spacing for crack control, a dependable band of NSCP 2015 serviceability points on the CELE.

15 min read · Super Ea