Steel Section Sizes And Weights Pdf
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Weights of ISMB, ISA, ISMC
Structural steel is a category of steel used for making construction materials in a variety of shapes. Many structural steel shapes take the form of an elongated beam having a profile of a specific cross section.
Structural steel shapes, sizes, chemical composition , mechanical properties such as strengths, storage practices, etc. Most structural steel shapes, such as I -beams , have high second moments of area , which means they are very stiff in respect to their cross-sectional area and thus can support a high load without excessive sagging. The shapes available are described in many published standards worldwide, and a number of specialist and proprietary cross sections are also available.
While many sections are made by hot or cold rolling , others are made by welding together flat or bent plates for example, the largest circular hollow sections are made from flat plate bent into a circle and seam-welded. The terms angle iron , channel iron , and sheet iron have been in common use since before wrought iron was replaced by steel for commercial purposes. They have lived on after the era of commercial wrought iron and are still sometimes heard today, informally, in reference to steel angle stock, channel stock, and sheet, despite that they are misnomers compare "tin foil", still sometimes used informally for aluminum foil.
In formal writing for metalworking contexts, accurate terms like angle stock , channel stock , and sheet are used. Most steels used throughout Europe are specified to comply with the European standard EN However, many national standards also remain in force. In these examples, 'S' denotes structural rather than engineering steel; or denotes the yield strength in newtons per square millimetre or the equivalent megapascals ; J2 or K2 denotes the materials toughness by reference to Charpy impact test values; and the 'W' denotes weathering steel.
And the most widely used specification is EN standard, which is Cold formed welded structural hollow sections of non-alloy and fine grain steels. EN specifies the technical delivery conditions for cold formed welded structural hollow sections of circular, square or rectangular forms and applies to structural hollow sections formed cold without subsequent heat treatment.
The normal yield strength grades available are , , , , , and , although some grades are more commonly used than others e. Higher grades are available in quenched and tempered material , , , , and - although grades above receive little if any use in construction at present.
A set of Euronorms define the shape of a set of standard structural profiles:. These steels have an alloy identification beginning with A and then two, three, or four numbers. The four-number AISI steel grades commonly used for mechanical engineering, machines, and vehicles are a completely different specification series. The standard commonly used structural steels are; .
Because steel components are "safety critical", CE Marking is not allowed unless the Factory Production Control FPC system under which they are produced has been assessed by a suitable certification body that has been approved to the European Commission.
In the case of steel products such as sections, bolts and fabricated steelwork the CE Marking demonstrates that the product complies with the relevant harmonized standard. The standard has come into force in late After a transition period of two years, CE Marking will become mandatory in most European Countries sometime early in Most construction projects require the use of hundreds of different materials. These range from the concrete of all different specifications, structural steel of different specifications, clay, mortar, ceramics, wood, etc.
Most commercial and industrial structures are primarily constructed using either structural steel or reinforced concrete. When designing a structure, an engineer must decide which, if not both, the material is most suitable for the design. There are many factors considered when choosing a construction material. Cost is commonly the controlling element; however, other considerations such as weight, strength, constructability, availability, sustainability, and fire resistance will be taken into account before a final decision is made.
The tallest structures today commonly called " skyscrapers " or high-rise are constructed using structural steel due to its constructability, as well as its high strength-to-weight ratio.
In comparison, concrete, while being less dense than steel, has a much lower strength-to-weight ratio. This is due to the much larger volume required for a structural concrete member to support the same load; steel, though denser, does not require as much material to carry a load. However, this advantage becomes insignificant for low-rise buildings, or those with several stories or less.
Low-rise buildings distribute much smaller loads than high-rise structures, making concrete the economical choice. This is especially true for simple structures, such as parking garages, or any building that is a simple, rectilinear shape.
Structural steel and reinforced concrete are not always chosen solely because they are the most ideal material for the structure. Companies rely on the ability to turn a profit for any construction project, as do the designers. The price of raw materials steel, cement, coarse aggregate, fine aggregate, lumber for form-work, etc. If a structure could be constructed using either material, the cheapest of the two will likely control.
Another significant variable is the location of the project. The closest steel fabrication facility may be much further from the construction site than the nearest concrete supplier. The high cost of energy and transportation will control the selection of the material as well. All of these costs will be taken into consideration before the conceptual design of a construction project is begun.
Structures consisting of both materials utilize the benefits of structural steel and reinforced concrete. This is already common practice in reinforced concrete in that the steel reinforcement is used to provide steel's tensile strength capacity to a structural concrete member.
A commonly seen example would be parking garages. Some parking garages are constructed using structural steel columns and reinforced concrete slabs. The concrete will be poured for the foundational footings, giving the parking garage a surface to be built on.
Pre-cast concrete beams may be delivered on site to be installed for the second floor, after which a concrete slab may be poured for the pavement area.
This can be done for multiple stories. A structural engineer understands that there are an infinite number of designs that will produce an efficient, safe, and affordable building. It is the engineer's job to work alongside the owner s , contractor s , and all other parties involved to produce an ideal product that suits everyone's needs.
Similarly, the melting point of steel changes based on the alloy. Steel never turns into a liquid below this temperature. Steel with 2. Steel loses strength when heated sufficiently. The critical temperature of a steel member is the temperature at which it cannot safely support its load. In China, Europe and North America e. The time it takes for the steel element that is being tested to reach the temperature set by the test standard determines the duration of the fire-resistance rating.
Heat transfer to the steel can be slowed by the use of fireproofing materials , thus limiting steel temperature. Common fireproofing methods for structural steel include intumescent , endothermic, and plaster coatings as well as drywall, calcium silicate cladding, and mineral wool insulating blankets. Concrete building structures often meet code required fire-resistance ratings, as the concrete thickness over the steel rebar provides sufficient fire resistance.
However, concrete can be subject to spalling , particularly if it has an elevated moisture content. Although additional fireproofing is not often applied to concrete building structures, it is sometimes used in traffic tunnels and locations where a hydrocarbon fuel fire is more likely, as flammable liquid fires provides more heat to the structural element as compared to a fire involving ordinary combustibles during the same fire period.
Structural steel fireproofing materials include intumescent, endothermic and plaster coatings as well as drywall , calcium silicate cladding, and mineral or high temperature insulation wool blankets. Attention is given to connections, as the thermal expansion of structural elements can compromise fire-resistance rated assemblies. Cutting workpieces to length is usually done with a bandsaw.
A beam drill line drill line has long been considered an indispensable way to drill holes and mill slots into beams, channels and HSS elements. CNC beam drill lines are typically equipped with feed conveyors and position sensors to move the element into position for drilling, plus probing capability to determine the precise location where the hole or slot is to be cut.
For cutting irregular openings or non-uniform ends on dimensional non-plate elements, a cutting torch is typically used. Oxy-fuel torches are the most common technology and range from simple hand-held torches to automated CNC coping machines that move the torch head around the structural element in accordance with cutting instructions programmed into the machine. Fabricating flat plate is performed on a plate processing center where the plate is laid flat on a stationary 'table' and different cutting heads traverse the plate from a gantry-style arm or "bridge".
The cutting heads can include a punch, drill or torch. From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. This article reads like a textbook and may require cleanup. Please help to improve this article to make it neutral in tone and meet Wikipedia's quality standards.
June Retrieved 2 March Precast Concrete. Estimating Building Costs. CRC Press. Designing Steel Structures for Fire Safety. Sustainability and Design Ethics. Principles of Structural Design. Absolute Steel. Retrieved 2 November Reinforced Concrete Design of Tall Buildings. Steel Fabrication Services. Retrieved Zalosh, copyright pg. Phan, J. Gross, and T. McAllister, View report.
Forming , fabrication , and finishing.
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Steel sections are the bread and butter of steel fabrication. Designers, architects and engineers choose different sections for their aesthetics and structural qualities — their choices determined by size, weight and profile. Steel is extremely versatile and can be moulded to many different shapes. On the other hand there are many common steel sections that you will see used throughout steel construction and fabrication, and would have come across in structures everyday. Angled structural steel sections can either either be equal or unequal. Angled section are used in residential construction , infrastructure, mining and transport.
Structural steel is a category of steel used for making construction materials in a variety of shapes. Many structural steel shapes take the form of an elongated beam having a profile of a specific cross section. Structural steel shapes, sizes, chemical composition , mechanical properties such as strengths, storage practices, etc. Most structural steel shapes, such as I -beams , have high second moments of area , which means they are very stiff in respect to their cross-sectional area and thus can support a high load without excessive sagging. The shapes available are described in many published standards worldwide, and a number of specialist and proprietary cross sections are also available. While many sections are made by hot or cold rolling , others are made by welding together flat or bent plates for example, the largest circular hollow sections are made from flat plate bent into a circle and seam-welded. The terms angle iron , channel iron , and sheet iron have been in common use since before wrought iron was replaced by steel for commercial purposes.
Sections. Universal Beams (UB). Dimensions and properties. Universal Beams (UB) sizes. Designation. Serial size. Mass per metre kg/m. Depth of section.
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In addition, there is helpful information on the applicable standards and other basics. Sizes are determined by standards which are described in the sections for each shape below. This makes them strong relative to the amount of material and weight that must be used in their construction. If you want to learn more about the properties of the different types of steel used in Structural Steel, check out our handy article on types of metals.
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