Bifurcated stair:  So arranged that there is a wide at the start and subdivided into narrow flights at mid landing.  The two narrow flights start from either side of mid landing.  They are suitable for modern public buildings. - Study24x7
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12 Apr 2019 09:36 AM study24x7 study24x7

Bifurcated stair:  So arranged that there is a wide at the start and subdivided into narrow flights at mid landing.  The two narrow flights start from either side of mid landing.  They are suitable for modern public buildings.

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