WEEK FOUR
TOPIC:WALL OPENINGS, JAMB, SILL AND LINTEL
CONTENT
(i) Meaning of wall openings.
(ii) Features of wall opening.
Meaning of wall openings
Wall openings: Wall openings are openings made on walls to serve the purposes of acessventilation, reflection of day light into the interiors of a building and for beauty. Examples of openings made in walls include: windows, doors, arches, manholes etc.
EVALUATION
1. What are wall openings?
2. Mention 4 types of wall openings
Features of wall openings
Jamb: This is the vertical side of a door frame.
Sill: The component which is placed across the bottom of a window.
Lintel: A horizontal component placed above a masonry opening e.g the door to support the load due to the
weight of the wall above it is called a lintel.
GENERAL EVALUATION
1. Draw a labelled wall opening showing a window and a door.
2. Mention 4 features of a door opening.
READING ASSIGNMENT
Visit www.google.com for types of wall opening.
WEEKEND ASSIGNMENT
Objective
The figure below shows a section through the wall of a building.
Use it to answer questions 1 to 3.
1. The part labelled X is the A. jamb. B. throating. C. sill. D. skirt.
2. The part labelled N is called A. throating. B. sill. C. jamb. D. lintel.
3. The part labelled M is the A. skirt. B. throating. C. DPC D. floor level.
4. Which of the following can be found in a door opening? A. Sill. B. Jamb. C. Eaves D. Tread.
5. A function of an internal wall is to A. carry loads. B. divide the space. C. enhance wall stability.
D. reinforce the foundation.
Theory
1. What are wall openings?
2. Draw a labelled wall opening showing a window and a door.