Structural design is a complex endeavor, involving the synthesis of many processes. The structural design of buildings, whether of structural steel or reinforced concrete, requires the determination the dimensions of the supporting framework and the selection of the cross sections of individual members. In this course subject, both LRFD and ASD are used, by which solutions for solving the allowable and design strengths will be explained in detail. Originally, structural steel design has been based on allowable stress design (ASD), also called working stress design. In ASD, allowable stress of a material is compared to calculated working stress resulting from service loads. On later years, the use of Load and Resistance Factor Design (LRFD) has been adapted for the design of structures.In the LRFD method, the design strength is given as the nominal strength multiplied by a resistance factor and this must equal or exceed the required strength given by the governing LRFD load combination. In the ASD method, the allowable strength is given as the nominal strength divided by a safety factor and this must equal or exceed the required strength given by the governing ASD load combination. This course subject covers both ASD and LRFD methods and presents design problems and solutions side-by-side in both formats.

COURSE LEARNING OBJECTIVES

At the end of the course, it is expected that students should be able to attain the following course learning objectives:

1. Understanding the in-depth stress-strain characteristics of steel in both elastic and plastic stages of deformation;

2. Be able to determine the strength of structural steel members in axial loading, bending, shear, and torsion for various cross-sectional shapes in both elastic and plastic conditions;

3. Be able to apply allowable strength and load-and-resistance factor design methods of steel designs;

4. Be able to determine the strength of bolted/riveted and welded connections; and

5. Demonstrate by numerical calculations and other methods the concepts, principles and theories obtained from the lecture portion of the course (CENG131L).

• For the student to accomplish the learning outcomes, they should master and be familiarized with the following topics as mentioned: