Steel frame From Wikipedia， the free encyclopedia Jump to: navigation， search Steel framed housing development， PSteel frame usually refers to a building technique with a "skeleton frame" of vertical steel columns and horizontal I-beams， constructed in a rectangular grid to support the floors， roof and walls of a building which are all attached to the The development of this technique made the construction of the skyscraper Contents [hide] 1 Concept 2 Light steel framing 3 See also 4 External links 5 References [edit] Concept The rolled steel "profile" or cross section of steel columns takes the shape of the letter "H" The two wide flanges of a column are thicker and wider than a the flanges on a beam， to better withstand compressive stress in the Square and round tubular sections of steel can also be used， often filled with Steel beams are connected to the columns with bolts and threaded fasteners， and historically connected by The central "web" of the steel "I "-beam is often wider than a column web to resist the higher bending moments that occur in Wide sheets of steel deck can be used to cover the top of the steel frame as a "form" or corrugated mold， below a thick layer of concrete and steel reinforcing Another popular alternative is a floor of precast concrete flooring units with some form of concrete Often in office buildings the final floor surface is provided by some form of raised flooring system with the void between the walking surface and the structural floor being used for cables and air handling The frame needs to be protected from fire because steel softens at high temperature and this can cause the building to partially In the case of the columns this is usually done by encasing it in some form of fire resistant structure such as masonry， concrete or The beams may be cased in concrete， plasterboard or sprayed with a coating to insulate it from the heat of the fire or it can be protected by a fire resistant ceiling The exterior "skin" of the building is anchored to the frame using a variety of construction techniques and following a huge variety of architectural Bricks， stone， reinforced concrete， architectural glass， sheet metal and simply paint have been used to cover the frame to protect the steel from the [edit] Light steel framing See also: Framing (construction) Interior wall studs made with light-gauge steelThin sheets of galvanized steel can be formed into steel studs used as a building material for rough-framing in commercial or residential construction (pictured)， and many other The dimension of the room is established with horizontal track that is anchored to the floor and ceiling to outline each The vertical studs are arranged in the tracks， usually spaced 16" apart， and fastened at the top and This creates a framework to support drywall or other finish Rectangular steel frame， or "perimeter frame" of the Willis building (at right) contrasted against the diagrid frame at 30 St Mary AThe primary shapes used in residential construction are the C-shape stud and the U-shaped track， and a variety of other Framing members are generally produced in a thickness of 12 to 25 The wall finish is anchored to the two flange sides of the stud， which varies from 1-1/4" to 3" thick， and the width of web ranges from 1-5/8" to 14" Rectangular sections are removed from the web to provide access for electrical Steel mills produce galvanized sheet steel， the base material for light-gauge Sheet steel is then roll-formed into the final profiles used for The sheets are zinc coated (galvanized) to prevent oxidation and Steel framing provides excellent design flexibility due to the inherent strength of steel， which allows it to span over a longer distance than wood， and also resist wind and earthquake Light Steel Framing has been extensively used in cold climate countries due to its good thermal and structural Heat loss reduction and tenement thermal comfort have been the main driving forces defining the design of these The main issue to be addressed is how striving for thermal efficiency can lead to structural weakening and poor fire [1] [edit] See also Curtain wall Prefabricated buildings Steel building Structural steel BRBF [edit] External links Wikimedia Commons has media related to: Steel framing Historical Development of Iron and Steel in Buildings Steel Framing Alliance web site Categories: Construction
