contents. Bearings Horizontal and transversal wind bracing Classification of bridges . Bearings . They are made from cast iron for small roadway bridges or cast steel; they distribute the reaction over a sufficient area of the abutment.We have:- a - Boll bearing.Free rotation and free expansion in all direction except vertical movement b- Movable or expansion bearing.One rotation and one horizontal movementM c- Hinged bearing.One rotation only.
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