The parabolic curve is one of the most efficient structural designs known in bridge engineering. It is also one of the most timeless.
The classic appearance of the Steadfast Keystone® truss bridge is frequently used in residential and commercial settings where aesthetics dictate the bridge style. With clear spans up to 150 feet, the Keystone style is one of our most popular designs. The depth at the center is usually 10% of the clear span. With longer spans, the center depth may be reduced to 7% of the span.
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