Class: Senior Secondary School 2 (SS2 / SSS2)
Term: 3rd Term
Week: 9
Age: 16 years
Duration: 45 minutes
Subject: Technical Drawing
Curriculum Theme: Building Drawing
Previous Lesson: Details of Parts of Buildings: Identification of Building Parts.
Topic: DETAILS OF PART OF BUILDINGS
Subject Matter: Detailed building drawings (foundations, floors, walls, openings, lintels)

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Identify the different parts of a building requiring detailed drawings.
Explain the purpose of detailed drawings for various building components.
State the key elements to include in detailed drawings of foundations, floors, walls, openings, and lintels.

Affective Domain:

Appreciate the importance of accuracy and precision in technical drawing.
Show interest in learning how to represent building details professionally.

Psychomotor Domain:

Sketch typical sections of foundations, floors, and walls.
Draw detailed representations of openings (doors and windows) and lintels with appropriate dimensions.
Label the different components and materials in their detailed drawings.

Collaborate with peers to discuss different methods of representing building details.

Reference Materials

The following resources were used in planning this lesson:

Senior Secondary Schools Education Curriculum
State Unified Scheme of Work
Building Construction and Technical Drawing for Senior Secondary Schools by E.N. Ezeji

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing detailed sections of building parts (foundations, floors, walls, openings, lintels).
Drawing board, T-square, set squares, pencils, eraser, ruler.
Examples of detailed building drawings.

Rationale for the Lesson

This lesson enables pupils to understand how individual building components are constructed and represented in technical drawings. It helps them to develop the skills needed to produce accurate and clear detailed drawings, which are essential for effective communication in the construction industry.

Prerequisite/Previous Knowledge

Pupils have prior knowledge of basic technical drawing principles, orthographic projections, and general building construction terms.

Lesson Content/Board Summary

DETAILS OF PART OF BUILDINGS

Introduction to Detailed Building Drawings

Detailed building drawings provide specific information about the construction, materials, and dimensions of individual components within a building. They are crucial for builders and craftsmen to understand how parts are assembled and to avoid errors during construction.

Foundations

A foundation is the lowest part of a building, designed to transfer the building’s load safely to the ground. Detailed drawings of foundations typically show a cross-section, illustrating:

The concrete strip footing: indicating width, depth, and reinforcement (if any).
Hardcore layer: compacted material beneath the floor slab.
Damp-Proof Course (DPC): a layer of impervious material to prevent moisture rise.
The initial courses of brickwork or blockwork above the foundation.
Ground level and finished floor level.

Floors

Floors provide horizontal surfaces within a building. Detailed drawings of floors, such as a ground floor slab, typically show a cross-section illustrating:

Finished floor material: e.g., tiles, carpet.
Screed: a layer of cement/sand mix for leveling.
Concrete slab: the main structural element of the floor.
Damp-Proof Membrane (DPM): prevents moisture from rising through the slab.
Hardcore: compacted aggregate beneath the slab.
Sub-base and natural ground.

Walls

Walls enclose spaces and support roofs. Detailed drawings of walls, particularly a typical wall section, illustrate:

Brickwork or blockwork: showing courses and bonding patterns.
Wall thickness and dimensions.
Damp-Proof Course (DPC) position.
Internal and external finishes: e.g., plaster, render.
Connection to foundation and roof components.

Openings (Doors and Windows)

Openings are designed for access (doors) and light/ventilation (windows). Detailed drawings of openings show how they are integrated into the wall structure, including:

Frame details: jambs, sills, heads.
Door or window type and dimensions.
Fixings to the wall.
Threshold details for doors.
Glazing details for windows.
Lintel above the opening.

Lintels

A lintel is a horizontal structural member placed over an opening (door or window) to support the wall above it. Detailed drawings of lintels typically show:

Lintel material: e.g., reinforced concrete, steel, timber.
Dimensions of the lintel: width, depth, and bearing length on the wall.
Reinforcement details for concrete lintels.
Position relative to the opening and the wall courses.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to recall basic components of a building and their functions. The teacher then introduces the topic: “Details of Part of Buildings” and explains its relevance.
Pupils’ Activity: Pupils respond to the questions and listen attentively to the introduction.
Learning Point: Pupils are prepared for the lesson and understand the lesson’s objective.

Step 2: Foundations

Time: 7 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher explains what foundations are and their importance. Using charts, the teacher demonstrates how to draw a detailed cross-section of a typical strip foundation, highlighting the concrete strip, hardcore, DPC, and brickwork.
Pupils’ Activity: Pupils observe the charts and listen to the explanation, taking notes on key elements.
Learning Point: Pupils understand the structure and representation of foundations in detail.

Step 3: Floors

Time: 7 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher explains the function of floors and focuses on ground floor construction. Using charts, the teacher illustrates how to draw a detailed cross-section of a ground floor slab, showing the various layers like screed, concrete slab, DPM, and hardcore.
Pupils’ Activity: Pupils pay attention to the explanation and examine the detailed floor drawings on the charts.
Learning Point: Pupils learn about the construction and drawing details of floors.

Step 4: Walls

Time: 7 minutes
Teaching Skill: Explanation/Visualisation
Teacher’s Activity: The teacher discusses different types of walls and their typical construction. Using charts, the teacher guides pupils on drawing a detailed section of a wall, emphasizing brickwork details, DPC placement, and finishes.
Pupils’ Activity: Pupils listen, ask questions, and visualize the wall sections as explained.
Learning Point: Pupils understand how to represent wall details accurately.

Step 5: Openings and Lintels

Time: 7 minutes
Teaching Skill: Explanation/Guided Practice
Teacher’s Activity: The teacher explains the purpose of openings (doors and windows) and lintels. Using charts, the teacher demonstrates how to draw detailed sections of door/window openings and lintels, showing frames, sills, heads, and lintel supports.
Pupils’ Activity: Pupils observe the demonstration and make mental notes for their own drawings.
Learning Point: Pupils learn to draw detailed representations of openings and lintels.

Step 6: Practical Application/Sketching

Time: 5 minutes
Teaching Skill: Practical Application
Teacher’s Activity: The teacher provides a simple sketch problem, asking pupils to sketch a detailed section of a foundation or a window opening, reinforcing the concepts taught.
Pupils’ Activity: Pupils attempt to sketch one of the detailed parts on their drawing sheets or notebooks.
Learning Point: Pupils apply their understanding to practical sketching tasks.

Step 7: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Identify four parts of a building that require detailed drawings.
Explain the purpose of a Damp-Proof Course (DPC) in a building.
List three key elements you would include in a detailed drawing of a strip foundation.
Describe the function of a lintel in a building structure.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the importance of accurate detailed drawings in construction. The teacher then assigns homework: “Draw a detailed cross-section of a typical ground floor slab to a suitable scale, labeling all components.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework assignment.
Learning Point: Pupils consolidate their learning and prepare for further practice.

Lesson Keywords

Foundations – The lowest part of a building that transfers loads to the ground.
Floors – Horizontal surfaces that divide a building into stories.
Walls – Vertical structures that enclose and divide spaces within a building.
Openings – Spaces in walls for doors and windows.
Lintels – Horizontal structural members spanning over openings to support the wall above.
Detailed Drawing – Technical drawings showing specific construction, materials, and dimensions of building components.
Damp-Proof Course (DPC) – A layer of waterproof material in a wall to prevent moisture from rising.

Differentiation

For pupils who grasp concepts quickly, the teacher can challenge them to draw a more complex detail, such as a corner foundation or a window with a specific sill detail. For pupils needing more support, the teacher can provide pre-drawn outlines or simplified diagrams to trace and label, focusing on one detail at a time.

Note for teachers using this lesson plan

Ensure that actual charts or projected images of detailed building drawings are available for visual reference. Encourage pupils to use proper drawing instruments for accuracy. Emphasize the importance of scale and clear labeling in all detailed drawings. Practical exercises and feedback are crucial for developing drawing skills.