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Architectural Design II

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Construction Design

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Form & Function: Expression of Truth/Beauty
	Concepts & Research
Suspension Bridge A suspension bridge is one where cables (or ropes or chains) are strung across the river (or whatever the obstacle happens to be) and the deck is suspended from these cables. Modern suspension bridges have two tall towers through which the cables are strung. Thus, the towers are supporting the majority of the roadway's weight. Almost all suspension bridges have, in addition to the cables, a supporting truss system beneath the bridge deck (a deck truss). This helps to stiffen the deck and reduce the tendency of the roadway to sway and ripple.
Cable Stayed Bridge A cable-stayed bridge is a bridge that consists of one or more columns, normally referred to as towers or pylons, with cables supporting the bridge deck. There are two major classes of cable-stayed bridges. The harp design, the cables are made nearly parallel by attaching cables to various points on the towers so that the height of attachment of each cable on the tower is similar to the distance from the tower along the roadway to its lower attachment. In a fan design, the cables all connect to or pass over the top of the towers.
Arch Bridge An arch bridge is a semicircular structure with abutments on each end. The design of the arch, the semicircle, naturally diverts the weight from the bridge deck to the abutments. Arch bridges are always under compression and the force of compression is pushed outward along the curve of the arch toward the abutments.