Podcast
Questions and Answers
What is the term used for wood suitable for construction?
What is the term used for wood suitable for construction?
timber
What do we call wood that is cut into pieces of specific thickness, width, and length?
What do we call wood that is cut into pieces of specific thickness, width, and length?
lumber
Which of the following are uses of timber? (Select all that apply)
Which of the following are uses of timber? (Select all that apply)
Lumber is classified only as rough-sawn lumber.
Lumber is classified only as rough-sawn lumber.
Signup and view all the answers
What is the designation for lumber dressed on two sides?
What is the designation for lumber dressed on two sides?
Signup and view all the answers
What is plywood made of?
What is plywood made of?
Signup and view all the answers
Timber should have high strength in bending, shear, and direct compression, indicating high __________.
Timber should have high strength in bending, shear, and direct compression, indicating high __________.
Signup and view all the answers
Which of these properties indicate the quality of timber? (Select all that apply)
Which of these properties indicate the quality of timber? (Select all that apply)
Signup and view all the answers
Good timber should not __________ under changing environmental conditions.
Good timber should not __________ under changing environmental conditions.
Signup and view all the answers
What is an indication of good timber when struck?
What is an indication of good timber when struck?
Signup and view all the answers
Study Notes
Overview of Timber
- Timber refers to wood used for construction and engineering purposes.
- Key building material utilized in structural framing, cabinetry, flooring, and architectural woodwork.
Properties of Wood
- Exhibits high strength in compression, tension, and bending relative to its weight.
- Possesses excellent impact resistance.
Lumber Specifications
- Lumber is wood cut to specific thickness, width, and length.
- Types of lumber include:
- Rough framing members (minimum 2″ thick) like beams and posts.
- Finished lumber for flooring and trim.
- Specialty items such as decorative panels and carved doors.
- Lumber classification:
- Rough-sawn: cut to size but not finished.
- Surfaced: finished with a planer, with designations S2S (dressed on two sides) and S4S (dressed on all four sides).
Plywood Characteristics
- Made from several layers of lumber with perpendicular grain orientation for strength.
- Generally available in 4′ × 8′ panels; thickness ranges from 1/8″ to over 1″.
- Types of plywood:
- Interior plywood: uses water-resistant adhesive for cabinetry and walls.
- Exterior plywood: uses waterproof adhesive for wall sheathing and roof sheathing.
Glu Laminated Timber
- Involves laminating wood layers with adhesives to create large-span structures.
- Suitable for beams and arches, and prepared for both interior and exterior applications.
Uses and Importance of Timber
- Common applications include:
- Structural components like posts, beams, lintels, rafters, purlins, and trusses.
- Interior decoration and furniture making.
- Additional uses in sports goods and railway sleepers.
Quality Assessment of Timber
- Color uniformity indicates quality; light colors may signify weakness.
- Freshly cut timber should have a pleasant odor.
- Good timber produces a clear ringing sound when struck.
- Texture should be fine and even with close grains.
- Higher density indicates stronger timber through thicker walls.
- Durability is marked by resistance to warping and shock loads.
- Good timber shows high abrasion resistance and strength in bending, shear, and compression.
- Modulus of elasticity should be high for preferred construction materials.
- Specific gravity varies from 0.3 to 0.9, indicating the material's density and porosity.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the basics of timber and its uses in construction engineering. It includes topics on suitability of wood for building construction and other engineering purposes.
