Tag Archive for Tag: Erection

Tag: Erection Erection Tolerances

Dimensional variations in the field often are a consequence of permissible variations in rolling of steel and in shop fabrication. Limits for mill variations are prescribed in ASTM A6, ‘‘General Requirements for Delivery of Rolled Steel Plates, Shapes, Sheet Piling, and Bars for Structural Use.’’ For example, wide-flange beams are considered straight, vertically or laterally, if they are within 1⁄8 in for each 10

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Tag: Erection Erection Procedure for Bridges

Bridges are erected by a variety of methods. The choice of method in a particular case is influenced by type of structure, length of span, site conditions, manner in which material is delivered to the site, and equipment available. Bridges over navigable waterways are sometimes limited to erection procedures that will not inhibit traffic flow; for example, falsework may be prohibited. Regardless of erection

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Tag: Erection Erection Methods for Buildings

The determination of how to erect a building depends on many variables that must be studied by the erection engineer long before steel begins to arrive at the erection site. It is normal and prudent to have this erection planning developed on drawings and in written procedures. Such documents outline the equipment to be used, methods of supporting the equipment, conditions for use

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Tag: Erection Erection Equipment

Steel buildings and bridges are generally erected with cranes, derricks, or specialized units. Mobile cranes include crawler cranes, rubber tired rough terrain cranes and truck cranes; stationary cranes include tower cranes and climbing cranes. Stiffleg derricks and guy derricks are generally considered stationary hoisting machines, but they may be mounted on mobile platforms. Guy derricks can be used where they

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