An eyebar is a straight metal bar with holes at either end used in construction, often in the form of an I-beam. It is designed to be taut rather than compressed, with other components attached at the holes. Eyelets may be connected to distribute load, and the bar is usually heat-treated and made of steel.
An eyebar is a structural element used in construction. It is usually a straight bar with a hole or “eye” at either end and is often made of metal. Other components may be attached to the eyebar at the holes on each end, and when the structure is designed, the eyebars are positioned to be taut rather than compressed. This means that the forces are pulling on the bar rather than pushing it, as the structural integrity of this bar is based on pulling forces rather than pushing or compressing forces.
Most often the eyebar is an I-beam, which is a metal beam that has an I-shaped profile. The ends of the eyebar in this case may have an opening at both ends or more; if the piece has multiple openings, it is usually fixed to another structural element using bolts or rivets for greater strength. In other cases, the eyebar may have a rectangular profile rather than an I-shape for structural rigidity and ease of construction. A common place to see such a component is on certain types of bridges, especially truss bridges.
The bar itself is usually of uniform thickness, although the length of the component can vary greatly depending on its purpose. It can be fixed at either end and other components can end up being fixed to the eyebar at any point along its length, although the forces placed on the bar will need to be carefully analyzed during construction to ensure excessive force is not placed in this way that the beam can fail. The bars are usually heat treated for durability and are made of strong metals, most commonly steel. Sometimes the holes at each end are made slightly smaller than necessary and are reamed in place for a snug fit.
Sometimes the eyelets are connected together to help distribute the load borne by the overall structure. This is sometimes known as a chain link structure, as connecting the eye bars together resembles the appearance of a chain, much like those found on bicycles or motorcycles. The end of each eyebar is often rounded, and the hole is open in the center of the rounded end. Other eyelets may be attached to the first by a pin, bolt, or rivet; the dimensions of the connecting element will vary according to the dimensions and function of the structure, as well as the dimensions of the bar itself.
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