The present practice in Bangladesh for erection of girders is placing the girder\ndirectly on the bearing pad and joining the adjacent two spans in deck slab\nlevel by adopting expansion joints, as the bridges are presently designed as\nsimply-supported beam bridge. The main disadvantage of this type of bridges\nis that, the seismic resistance is weak, and under the external force beyond the\ndesign range, the bridges are more likely to fall in danger because of failure in\ngirders. Also they have expansion joints for each span, which affects the\ncomfort of driving and the overall integrity of the bridge deck is poor [1].\nTherefore, design and construction of the bridges have been revised to establish\ncontinuity between girders of two adjacent spans and transform the\nbridge as simply supported continuous beam bridge [2]. Temporary bearing\n(sandbox) method is proposed in this paper to solve the system transformation\nof continuous beam bridges. Design of the temporary bearing is very\nsimple and can be manufactured at site. This method has been proved in\nconstruction of Arial Kha Bridge and can be applied for other similar bridges\nin Bangladesh.
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