Search results
Results from the WOW.Com Content Network
The triple spiral design is found as a decorative element in Gothic architecture. The three legs (triskeles) symbol is rarely found as a charge in late medieval heraldry, notably as the arms of the King of Mann (Armorial Wijnbergen, c. 1280), and as canting arms in the city seal of the Bavarian city of Füssen (dated 1317).
Architecture – is both the process and the product of planning, designing, and constructing buildings or any other structures. [7] Architectural works, in the material form of buildings, are often perceived as cultural symbols and as works of art. Historical civilizations are often identified with their surviving architectural achievements.
In classical architecture, an architrave (/ ˈ ɑːr k ɪ t r eɪ v /; from Italian architrave 'chief beam', also called an epistyle; [1] from Ancient Greek ἐπίστυλον (epistylon) 'on the column') is the lintel or beam, typically made of wood or stone, that rests on the capitals of columns. [2]
Historically a beam is a squared timber, but may also be made of metal, stone, or a combination of wood and metal [1] such as a flitch beam.Beams primarily carry vertical gravitational forces, but they are also used to carry horizontal loads such as those due to earthquake or wind, or in tension to resist rafter thrust or compression (collar beam).
Strength depends upon material properties. The strength of a material depends on its capacity to withstand axial stress, shear stress, bending, and torsion.The strength of a material is measured in force per unit area (newtons per square millimetre or N/mm², or the equivalent megapascals or MPa in the SI system and often pounds per square inch psi in the United States Customary Units system).
The secant stiffness of the connection is compared to the rotational stiffness of the connected member as follows, in which L and EI are the length and bending rigidity, respectively, of the beam. If K s L/EI ≥ 20, it is acceptable to consider the connection to be fully restrained (in other words, able to maintain the angles between members).
Key: 1: principal rafters, 2: collar beam, 3: arch braces. Lacking a tie beam, [ 11 ] the arch-braced (arched brace) [ 12 ] truss gives a more open look to the interior of the roof. The principal rafters are linked by a collar beam supported by a pair of arch braces, which stiffen the structure and help to transmit the weight of the roof down ...
By 1963, a new structural system of framed tubes had appeared in skyscraper design and construction. Fazlur Rahman Khan, a structural engineer from Bangladesh (then called East Pakistan) who worked at Skidmore, Owings & Merrill, defined the framed tube structure as "a three dimensional space structure composed of three, four, or possibly more frames, braced frames, or shear walls, joined at or ...