week 8 Flashcards
(25 cards)
What is structural steel widely used for in construction?
It is widely used in frame and truss construction.
What type of steel is used to make structural steel grades?
Structural steel grades are made from low-to-medium carbon steel.
Which steel sections are commonly used in structural applications?
Universal Beams (UBs), Universal Columns (UCs), channels, and angles.
When are built-up sections used instead of standard rolled sections?
Built-up sections are used when larger sizes are required beyond the standard sizes.
Why are hollow sections considered cost-effective in construction?
They provide greater rotational resistance while being economical.
Why is connection design important in steel structures?
Because it ensures the overall strength and stability of the structure
Can steel burn when exposed to fire?
Steel does not burn, but its strength is drastically reduced at high temperatures.
How can steel members be protected against fire?
By using suitable fire protection techniques, which can increase fire resistance for hours.
How are metals categorized in construction?
As ferrous metals (contain iron) and non-ferrous metals (do not contain iron).
What is pig iron and why is it used?
Pig iron contains high carbon and is not versatile as a construction material but is a valuable raw material for cast and wrought iron
What is cast iron, and how is it used in construction?
Cast iron, made from pig iron, contains less carbon and is used widely in casting and mass production
What is wrought iron, and what is its role in construction?
Wrought iron is made from pig iron and is a common construction material due to its strength and workability.
What types of steel are commonly used in construction?
High-tensile steel, reinforcing steel, structural steel, sheet steel, and alloy steel.
What are the benefits of alloy steel in construction?
It offers higher strength, greater hardness, and better resistance to corrosion.
What are the main categories of alloy steels?
Low-alloy steels, high-strength structural steels, quenched and tempered low-carbon constructional alloy steels, and stainless steels
What are the benefits of aluminium in building construction?
Aluminium is lightweight, flexible, strong, corrosion-resistant, and easy to cut and drill.
What is the recycling rate of aluminium in the construction industry?
Approximately 85%.
Why is copper widely used in construction?
It is corrosion-resistant, especially against seawater, and easy to shape due to its softness and flexibility
What makes copper alloys such as bronze and brass useful in construction?
Their strength makes them important building materials.
What is zinc commonly used for in building applications?
For cold weather roofing, rainwater protection accessories, electrical storage batteries, and protective coatings on steel products.
How does zinc perform in different environments?
It resists corrosion in inland and marine atmospheres but can corrode in industrial environments.
In what forms is lead available for construction use?
In extruded (pipe, rod, wire), rolled (sheet, foil, strip), cast, and miscellaneous forms (wool, powder)
What makes lead a flexible construction material?
It is extremely workable and can be cold-worked into complex shapes.
How does metallic lead react with other substances?
It is mostly unreactive but can be attacked by some organic acids and acids found in certain timbers.
