Span (architecture): Facts, Discussion Forum, and Encyclopedia Article

All Topics

Span (architecture)

	Email		Print
	Bookmark		Link

	Span (architecture)
	Home Discussion
	Topics Span (architecture) Topic Home Span is a section between two intermediate supports, e.g. of a beamBeam (structure) A beam is a structural that carries load primarily in bending.... or a bridgeBridge A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obs... . A span can be made of a solid beam or of a rope. The first kind of span is used for bridges, the second one used for power lineElectric power transmission Electric power transmission is one process in the transmitting of electricity to consumers.... s, overhead telecommunication lines, some type of antennasAntenna (radio) An antenna or aerial is an electrical device designed to transmit or receive radio waves or, more generally, any elect... or for aerial tramwayAerial tramway An aerial tramway is a type of aerial lift, often called a cable car or ropeway, and sometimes incorrectly refer... s. The span is a significant factor in finding the strength and size of a beam as it determines the maximum bendingBending This article is about the structural behavior.... momentMoment (physics) In physics, the moment of force is a quantity that represents the magnitude of force applied to a rotational system at a dis... and deflectionDeflection [[fr:Flexion ]... . The maximum bending moment and deflection in the pictured beam is found using: moment: M_max = 1/8 · q · L² deflection: f_max = 5/48 · M_max· L² / (E · I) From this it follows that if the span is doubled, the maximum moment (and with it the stressTensile stress Tensile stress is the stress state leading to expansion; that is, the length of a material tends to increase in the tensile ... ) will increase four times, and deflection will increase sixteen times. For remarkable long-distance rope spans, used as power line, antenna or for aerial tramways, see List of spansList of spans An incomplete list of remarkable spans, either used for powerline crossings of rivers, sea straits or valleys, as antenna or for a... . See also archArch An arch is a curved structure capable of spanning a space while supporting significant weight .... neutral axisNeutral axis An axis in the cross section of a beam or shaft or the like along which there are no longitudinal stresses / strains.... vaultVault In architecture, a vault is an arched structure of masonry, forming a ceiling or canopy....