What Is Lightweight Construction?

If you find any extensive use of 2 X 4 or 2 X 3 materials, or unprotected structural steel, or any engineered components which use these lightweight elements, it should be considered lightweight construction.

Why is the use of lightweight wood frame construction a concern for fire fighters?


Structural members made of wood trusses and wooden I-beam joists lack mass and have a greater surface area-to-mass ratio. This causes fire to attack a greater area and quickly weakens the strength of that lightweight member.

What is lightweight construction and what are the materials used?

Lightweight Construction Must be Economical

The most important materials are steel, aluminium and magnesium. Their differing material properties not only have an influence on the quality indicators but also on the processability of semi-finished and finished products and the associated costs.

What is the lightest construction material?

Metallic microlattice. Metallic microlattice is the world’s lightest metal and one of the lightest structural materials. This synthetic porous material made from nickel phosphorous tubes has a density as low as 0.9 milligrams per cubic centimeter.

What is the lightest material to build with?

Spruce, fir, and pine are good choices for framing your house as these are light, structural timber milled from softwood trees, which are sawn and machine-planed into standard dimensions for construction. They are lightweight, sturdy wood types.

What are the 5 types of building construction?

Buildings can be categorized into five different types of construction: fire-resistive, non-combustible, ordinary, heavy timber, and wood-framed.

What are the dangers of lightweight wood frame construction?

Wooden I-beams are notorious for rapid fire spread and early catastrophic failure in as little as four minutes of fire involvement. The particle board is often breached by flex ductwork or other utility penetrations, which further weakens the system.

Is wood construction safe?

Wood construction of big buildings is catching on just about everywhere for good reasons: wood is renewable. In construction it is light, fast and less expensive than other materials. It’s also just as safe- when it is finished.

What is lightweight concrete made of?

Lightweight concrete is a mixture made with lightweight coarse aggregates such as shale, clay, or slate, which give it its characteristic low density. Structural lightweight concrete has an in-place density of 90 to 115 lb/ft³, whereas the density of regular weight concrete ranges from 140 to 150 lb/ft³.

What type of construction uses lightweight wood trusses?

Type 5 construction is found in many modern homes. The walls and roofs are made of combustible materials–most commonly wood. If the walls are wood-framed, the roof usually is as well. Rooftops are ceramic tile or asphalt shingles placed over lightweight trusses and OSB.

What is the lightest most durable material?

A team of MIT researchers have created the world’s strongest and lightest material known to man using graphene. Futurism reports: Graphene, which was heretofore, the strongest material known to man, is made from an extremely thin sheet of carbon atoms arranged in two dimensions.

Why is a lightweight a useful property for building materials?

Lightweight concrete has become a popular construction material because of several advantages it holds over conventional concrete. Lightweight concrete is characterized by good compressive strength, durability and the most important advantages – low density and improved properties of thermal conductivity.

What is a lightweight truss?

Lightweight truss construction consists of top and bottom members that run parallel. These are referred to as chords and are made of wood. These chords are cross -connected for support by wood that forms a web like pattern. All wood usually consists of 2×4’s or 2×3’s.

Which construction feature presents the greatest collapse hazard?

Roof or floor collapse is generally the biggest hazard with these types of buildings; such a collapse may cause the exterior walls to collapse.

What temperature do gusset plates fail?

Since the gusset plate does not penetrate the wood deeply, heat causes the gusset plate to pop off the lumber causing the bracing members to disconnect themselves. This process occurs at temperatures as low as 880 degrees Fahrenheit (Bracken Engineering, 2012).

What is lightweight truss construction?

A lightweight wood truss allows fire to spread inside a concealed space along the length of the truss, but temporarily blocks the fire spread perpendicular to the truss.

What are the four main classifications of construction?

The four major types of construction include residential building, institutional and commercial building, specialized industrial construction, infrastructure and heavy construction.

  • Residential Building. …
  • Institutional and Commercial Building. …
  • Specialized Industrial Construction. …
  • Infrastructure and Heavy Construction.

What is the difference between Type 1 and Type 2 construction?

The major difference is that it is not protected. For example, in a Type I building we will see columns and beams covered with fire resistive spray on material as seen in the first picture. In a Type II building these columns and beams are not protected and will be exposed during a fire.

What is considered heavy construction?

heavy construction means construction other than building construction; e.g., highway or street, sewer and pipeline, railroad, communication and power line, flood con- trol, irrigation, marine, etc.

What is the lightest solid on earth?

Aerogel – The Lightest Solid Material on the Planet

And it’s the lightest solid material on the planet. Aerogel insulates space suits, makes tennis rackets stronger and could be used one day to clean up oil spills.

Is air the lightest thing on earth?

“For reference, the density of air is 1.2 milligrams per cubic centimetre — so the new material is 7.5 times lighter than air. It’s twice as heavy as hydrogen — the lightest element there is — but beats out helium, which has a density of 0.1786 milligrams per cubic centimetre.

What is the lightest but strongest metal on earth?

New Magnesium based alloy as World’s strongest and lightest metal to change the world. Researchers from North Carolina State University have developed a material using magnesium which is light like aluminum, but as strong as titanium alloys. This material has the highest strength-to-weight ratio known to mankind.