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Hollow Structural Section
A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The term is used predominantly in the United States, or other countries which follow US construction or engineering terminology. HSS members can be circular, square, or rectangular sections, although other shapes such as elliptical are also available. HSS is only composed of structural steel per code. HSS is sometimes mistakenly referenced as ''hollow structural steel''. Rectangular and square HSS are also commonly called ''tube steel'' or ''box section''. Circular HSS are sometimes mistakenly called '' steel pipe'', although true steel pipe is actually dimensioned and classed differently from HSS. (HSS dimensions are based on exterior dimensions of the profile; pipes are also manufactured to an exterior tolerance, albeit to a different standard.) The corners of HSS are heavily rounded, having a radius which is approximately twice the wall thickness. The wall thickness is uniform aroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Grades
Steel grades are grades used to classify various steels by their composition and physical properties. Steel grades have been developed by a number of standards organizations. Steel grades standards by country * For alloys in general (including steel), unified numbering system (UNS) of ASTM International and the Society of Automotive Engineers (SAE). *American steel grades : AISI/SAE steel grades standard *British Standards *International Organization for Standardizationbr>ISO/TS 4949:2016* European standards – EN 10027 *Japanese steel grades : Japanese Industrial Standards (JIS) standard and NK standard *Germany steel grades : DIN standard *China steel grades : GB standard *Czech steel grades : ČSN standard *Russia steel grades : GOST standard *Spain steel grades : UNE standard *France steel grades : AFNOR standard *Italy steel grades : UNI standard *Sweden steel grades : SIS Sis or SIS may refer to: People *Michael Sis (born 1960), American Catholic bishop Places * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Steel
Structural steel is 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 (geometry), cross section. Structural steel shapes, sizes, chemical composition, mechanical properties such as strengths, storage practices, etc., are regulated by Technical standard, standards in most industrialized countries. Structural steel shapes, such as I-beams, have high Second moment of area, second moments of area, so can support a high Structural load, load without excessive Hogging and sagging, sagging. Structural shapes The shapes available are described in published standards worldwide, and specialist, proprietary cross sections are also available. *I-beam, I-beam (serif capital 'I'-shaped cross-section – in Britain these include Universal Beams (UB) and Universal Columns (UC); in Europe it includes the IPE, HE, HL, HD and other sections; in the US it includes Wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Pipe Fitting
A structural pipe fitting, also known as a slip on pipe fitting, clamp or pipe clamp is used to build structures such as handrails, guardrails, and other types of pipe or tubular structure. They can also be used to build furniture and theatrical riggings. The fittings slip on the pipe and are usually locked down with a set screw. The set screw can then be tightened with a simple hex wrench. Because of the modular design of standard fittings, assembly is easy, only simple hand tools are required, and risks from welding a structure are eliminated. Other advantages of using structural pipe fittings are easy installation and reconfigurable design. Since there are no permanent welds in the structure, the set screws of the fittings can simply be loosened, allowing them to be repositioned. The project can be disassembled and stored if needed, or even taken apart with fittings and pipe recycled into a new project. Fittings used for strong structures are galvanised Galvanization ( al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Profile (engineering)
In standardization, a profile is a subset internal to a specification. Aspects of a complex technical specification may necessarily have more than one interpretation, and there are probably many optional features. These aspects constitute a profile of the standard. Two implementations engineered from the same description may not interoperate due to having a different profile of the standard. Vendors can even ignore features that they view as unimportant, yet prevail in the long run. The use of profiles in these ways can force one interpretation, or create de facto standards from official standards. Engineers can design or procure by using a profile to ensure interoperability. For example, the International Standard Profile, ISP, is used by the ISO in their ISO ISP series of standards; in the context of OSI networking, Britain uses the UK-GOSIP profile and the US uses US- GOSIP; there are also various mobile profiles adopted by the W3C for web standards. In particular, impleme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightening Holes
Lightening holes are holes in structural components of machines and buildings used by a variety of engineering disciplines to make structures lighter. The edges of the hole may be flanged to increase the rigidity and strength of the component. The holes can be circular, triangular, elliptical, or rectangular and should have rounded edges, but they should never have sharp corners, to avoid the risk of stress risers, and they must not be too close to the edge of a structural component. Usage Aviation Lightening holes are often used in the aviation industry. This allows an aircraft to be as lightweight as possible, retaining the durability and airworthiness of the aircraft structure. Maritime Lightening holes have also been used in marine engineering to increase seaworthiness of the vessel. Motorsports Lightening holes became a prominent feature of motor racing in the 1920s and 1930s. Chassis members, suspension components, engine housings and even connecting rods were dril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeycomb Structure
Honeycomb structures are natural or man-made structures that have the geometry of a honeycomb to allow the minimization of the amount of used material to reach minimal weight and minimal material cost. The geometry of honeycomb structures can vary widely but the common feature of all such structures is an array of hollow cells formed between thin vertical walls. The cells are often columnar and hexagonal in shape. A honeycomb-shaped structure provides a material with minimal density and relative high out-of-plane compression properties and out-of-plane shear properties. Man-made honeycomb structural materials are commonly made by layering a honeycomb material between two thin layers that provide strength in tension. This forms a plate-like assembly. Honeycomb materials are widely used where flat or slightly curved surfaces are needed and their high specific strength is valuable. They are widely used in the aerospace industry for this reason, and honeycomb materials in alumi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollow-core Slab
A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multi-story apartment buildings. The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including Northern Europe and former socialist countries of Eastern Europe. Precast concrete popularity is linked with low-seismic zones and more economical constructions because of fast building assembly, lower self weight (less material), etc. The precast concrete slab has tubular voids extending the full length of the slab, typically with a diameter equal to the 2/3–3/4 the thickness of the slab. This makes the slab much lighter than a massive solid concrete floor slab of equal thickness or strength. The reduced weight also lowers material and transportation costs. The slabs are typically 120 cm wide with standard thicknesses normally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compressive Strength
In mechanics, compressive strength (or compression strength) is the capacity of a material or Structural system, structure to withstand Structural load, loads tending to reduce size (Compression (physics), compression). It is opposed to ''tensile strength'' which withstands loads tending to elongate, resisting Tension (physics), tension (being pulled apart). In the study of strength of materials, compressive strength, tensile strength, and shear strength can be analyzed independently. Some materials fracture at their compressive strength limit; others Plasticity (physics), deform irreversibly, so a given amount of Deformation (engineering), deformation may be considered as the limit for compressive load. Compressive strength is a key value for Structural engineering, design of structures. Compressive strength is often measured on a universal testing machine. Measurements of compressive strength are affected by the specific test method and conditions of measurement. Compressive s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bollard
A bollard is a sturdy, short, vertical post. The term originally referred to a post on a ship or quay used principally for mooring boats. In modern usage, it also refers to posts installed to control road traffic and posts designed to prevent automotive vehicles from colliding with pedestrians and structures. Etymology The term is probably related to bole, meaning a tree trunk. The earliest citation given by the ''Oxford English Dictionary'' (referring to a maritime bollard) dates from 1844, although a reference in the '' Caledonian Mercury'' in 1817 describes bollards as huge posts. History Wooden posts were used for basic traffic management from at least the second half of the 17th century. One early well-documented case is that of the "postes and rales in ye King's highway for ye (safety) of all foot passengers" erected in 1671 in the High Street of Old Brentford, Middlesex (part of the London–Bath road). Another is that of "two oak-posts" set up next to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lally Column
A Lally column is a round or square thin-walled structural steel column filled with concrete, and oriented vertically to provide support to beams or timbers stretching over long spans. Historically, Lally columns were made of steel up to in thickness; today, that has been reduced in instances to . As engineered structural load-bearing components, Lally columns must be installed to their specific design specs. Fabrication A Lally column is formed of tubular steel. It is then filled with concrete, which carries a share of the compression load, and helps prevent local buckling of the shell. In addition to its low cost, an advantage of a generic Lally column over a custom structural steel column (or conventional I-beam) is that it may be purchased in its tubular state and cut to length on a construction site with standard jobsite power tools such as an angle grinder or reciprocating saw fitted with appropriate metal cutting blades. The term "Lally column" is sometimes conf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weathering Steel
Weathering steel, often referred to by the genericised trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys that form a stable external layer of rust that eliminates the need for painting. U.S. Steel, U.S. Steel (USS) holds the Trademark, registered trademark on the name COR-TEN. The name COR-TEN refers to the two distinguishing properties of this type of steel: corrosion resistance and tensile strength. Although USS sold its discrete plate business to International Steel Group (now ArcelorMittal) in 2003, it makes COR-TEN branded material in strip mill plate and sheet forms. The original COR-TEN received the standard designation A242 (COR-TEN A) from the ASTM International standards group. Newer ASTM grades are A588 (COR-TEN B) and A606 for thin sheet. All of the alloys are in common production and use. The surface oxidation generally takes six months to develop, although surface treatments can accelerate this to as lit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
