Simple Structures and… · JHS1 Career Technology

Lesson notes

Learning Objectives

Indicator: B7.4.1.1.2 - Discuss the causes of structural failures in construction

By the end of the lesson, learners can:

Explain what is meant by structural failure in construction in their own words.
Identify at least four types of structural failure, such as cracks, splits, and breakages.
Describe at least four causes of structural failure, including poor design, poor materials, weak joints, and fatigue.
Distinguish between static and dynamic forces and explain how each type can cause a structure to fail.
Sketch and label examples of structural failures observed in their environment and present them for appraisal.

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Curriculum details

Strand: Technology (Strand 4)
Sub-strand: Simple Structures and Mechanisms, Electric and Electronic Systems (4.1)
Content standard: B7.4.1.1 - Demonstrate understanding of structures in construction
Indicator: B7.4.1.1.2 - Discuss the causes of structural failures in construction
Suggested placement: Term 2, Week 10 (Week 22 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Career Technology, Common Core Programme (JHS1-JHS3), 2023, p. 27
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Explain what is meant by structural failure in construction.
E.g., when a structure collapses or fails to do its job.
2. Identify types of structural failure
E.g., cracks, splits, breakages in structures
3. Observe where structural failures occur in structures in the environment.
E.g., buildings, bridges, furniture
4. Discuss causes of structural failures.
E.g., poor design, poor material, weak joint and fatigue
5. Discuss how static and dynamic forces can cause structures to fail.
E.g.
- Static force-stationary force due to the structure's own weight or the load being carried
- Dynamic forces-moving force produced by wind, sea, vehicles and people.
6. Make sketches and notes on structural failures, in groups.
7. Display sketches for appraisal.