PSAD CELE Mastery Guide: Current Scope, Structural Reasoning, and Study Workflow

For most structural problems, use this order:

1. identify the structural system and supports;
2. define loads and combinations;
3. draw the free-body diagram;
4. solve reactions and internal actions;
5. identify the governing limit state or response;
6. apply the applicable material/code model;
7. calculate demand and capacity;
8. compare demand with allowable/design capacity; and
9. perform a unit, sign, magnitude, and failure-mode check.

Skipping the model-selection steps and jumping to a memorized formula is a common source of wrong answers.

Start with equilibrium:

For three-dimensional systems, include all force and moment components. A correct structural design solution cannot recover from an incorrect free-body diagram.

Core relationships include:

for axial stress,

for elastic flexural stress, and

for beam shear under the assumptions of elementary beam theory.

Use these equations only within their assumptions; section geometry, material behavior, and load type determine whether a formula is applicable.

For Euler-Bernoulli beam behavior,

PSAD may require determinate and indeterminate analysis, influence lines, pattern loading, and deflection. Choose the analysis method that matches the structure and the quantity requested rather than forcing every problem into one favorite method.

Concrete design requires both mechanics and code compliance. A robust workflow is:

• determine factored demand;
• establish section geometry and effective depth;
• apply strain compatibility and the code stress-block model;
• compute nominal strength;
• apply the required strength-reduction factor;
• check minimum/maximum reinforcement and detailing constraints; and
• verify shear, torsion, serviceability, or column interaction where applicable.

Do not memorize isolated $\phi$ factors or reinforcement limits without confirming the code edition used by the current examination guidance.

Prestressed-member analysis combines axial prestress, eccentricity, and externally induced bending. At an elastic section, stress contributions may be organized as:

Sign convention depends on the chosen reference axes and fiber. Always identify whether the question concerns transfer, service, or ultimate behavior before selecting losses, allowable stresses, or strength checks.

Steel questions should be organized by limit state rather than by one memorized capacity formula.

Common checks include:

• tension yielding and rupture;
• compression buckling;
• flexural yielding and lateral-torsional buckling;
• shear;
• combined axial load and bending;
• bolt shear/bearing/tension; and
• weld strength.

Determine the governing limit state after computing all applicable capacities.

Spread-footing design connects soil reaction with reinforced-concrete member checks. Typical sequence:

1. establish service or factored soil pressure as required by the question;
2. determine plan dimensions or verify bearing;
3. compute one-way shear;
4. compute punching shear;
5. compute flexure; and
6. detail reinforcement and development as required.

For piles, distinguish structural pile capacity, geotechnical capacity, and load distribution within the pile group.

The current PSAD program explicitly includes construction-materials testing. Review:

• purpose of common tests;
• specimen preparation and conditioning;
• interpretation of measured properties;
• equipment/application matching;
• concrete proportioning concepts; and
• how test results relate to specification acceptance.

Do not treat this competency as an optional construction-management topic.

The PRC program requires application of governing codes but does not, in the program text itself, enumerate every code edition. Use the code edition required by the current examination guidance and course materials, and verify critical numerical provisions before memorizing them.

The Association of Structural Engineers of the Philippines continues to identify NSCP publications as core Philippine structural references, and 2025 ASEP technical programming still referenced NSCP 2015. That supports its continued professional relevance, but examinees should still verify the edition applicable to their examination cycle.

1. Statics and equilibrium
2. Stress, strain, flexure, shear, and torsion
3. Determinate structural analysis
4. Deflection and indeterminate structures
5. Influence lines and pattern loading
6. Reinforced concrete beams and columns
7. Prestressed concrete
8. Steel beams, columns, beam-columns, bolts, and welds
9. Footings and pile-load concepts
10. Materials testing
11. Mixed code-based situations under time pressure