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  Factors Affecting Selection of Bridge Construction  Methods Before a bridge can be built an appropriate method of construction must be chosen. . The principle factors considered by the design team  are given below: The scale of the bridge The obstacles to be crossed The regularity of the span lengths The horizontal and vertical profiles of the bridge decks The nature of the soil strata The local weather The local cost of materials The local labor markets The accessibility of the site The time allowed for construction see also  What are Methods of Steel Structure Design

  Different Methods of Bridge Construction Described below are the different methods employed in the construction of bridges. 1. Cast-in-situ Method of Bridge Construction This method is a flexible method of bridge construction where complex and unusual geometrical shapes of dams can be constructed easily. Situations when it is hard to transport pre-fabricated elements either due to size or unreachability, this method is a good choice. 2. Balanced Cantilever Method of Bridge Construction This method is used for constructing bridges with span 50 to 250m. The bridge constructed can either be cast-in-place or precast. Here, the segments are attached in an alternative manner at opposite ends of the cantilevers supported by piers 3. Precast Method of Bridge Construction In this method, the bridge is constructed with the help of precast concrete elements. Precast Beams Precast Decks Precast Segmental Decks 4. Span by Span Casting method of Bridge Construction This method is associated wi...

 What are Methods of Steel Structure Design? There are three different methods for design of steel structure, i.e.  simple design,  continuous design and  semi-continuous steel design 1. Simple Design is the most traditional approach and is still commonly used. It is assumed that no moment is transferred from one connected member to another, except for the nominal moments which arise as a result of eccentricity at joints. The resistance of the structure to lateral loads and sway is usually ensured by the provision of bracing or, in some multi-storey buildings, by concrete cores. 2.  Continuous Design  In continuous design, it is assumed that joints are rigid and transfer moment between members. The stability of the frame against sway is by frame action (i.e. by bending of beams and columns). The connections between members must have different characteristics depending on whether the design method for the frame is elastic or plastic. The joint must be able t...