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A typical cross-section of I-beams. There are two standard I-beam forms: Rolled I-beam, formed by hot rolling, cold rolling or extrusion, depending on the material. Plate girder, formed by welding (or occasionally bolting or riveting) plates. I-beams are commonly made of structural steel but may also be formed from aluminium or other
DIN 1025 is a DIN standard which defines the dimensions, masses and sectional properties of hot rolled I-beams.. The standard is divided in 5 parts: DIN 1025-1: Hot rolled I-sections - Part 1: Narrow flange I-sections, I-serie - Dimensions, masses, sectional properties
Bullhead rail was the standard for the British railway system from the mid-19th until the mid-20th century. In 1954, bullhead rail was used on 449 miles (723 km) of new track and flat-bottom rail on 923 miles (1,485 km). [ 13 ]
Most smaller bleachers are frame-type bleachers and most larger bleachers are I-Beam bleachers. Bleachers range in size from small, modular, aluminum stands that can be moved around soccer or hockey fields to large permanent structures that flank each side of an American football field. Some bleachers have locker rooms underneath them.
In a plate girder bridge, the plate girders are typically I-beams made up from separate structural steel plates (rather than rolled as a single cross-section), which are welded or, in older bridges, bolted or riveted together to form the vertical web and horizontal flanges of the beam. In some cases, the plate girders may be formed in a Z-shape ...
The standard that covers CE Marking of structural steelwork is EN 1090-1. The standard has come into force in late 2010. After a transition period of two years, CE Marking will become mandatory in most European Countries sometime early in 2012. [8] The official end date of the transition period is July 1, 2014.