Write a short note on Mackinac bridge .
Answers
Explanation:
Also know as the “Big Mac” or the “Mighty Mac”, the bridge stretches 8,614 feet making it the fourth longest suspension bridge in the world. With a total span of approximately 5 miles, the Mackinac Bridge connects the Upper and Lower Peninsulas of Michigan uniting the communities of Mackinaw City and St.
This type of bridge has cables suspended between towers, with vertical suspender cables that transfer the live and dead loads of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc upward for additional clearance. Like other suspension bridge types, this type often is constructed without falsework.
The suspension cables must be anchored at each end of the bridge since any load applied to the bridge is transformed into a tension in these main cables. The main cables continue beyond the pillars to deck-level supports, and further continue to connections with anchors in the ground. The roadway is supported by vertical suspender cables or rods, called hangers. In some circumstances, the towers may sit on a bluff or canyon edge where the road may proceed directly to the main span, otherwise the bridge will usually have two smaller spans, running between either pair of pillars and the highway, which may be supported by suspender cables or their own trusswork. In the latter case, there will be very little arc in the outboard main cables.
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