STAIRWAY DESIGN AND CONSTRUCTION. - Page 50 - Section 11 - Stair Building

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STAIRWAY DESIGN AND CONSTRUCTION.

Fig. 46. Internediate floor on the platform level. (click here for full size image)

Fig. 46. Internediate floor on the platform level.
arrangement is suitable where space is limited and where the entrance to the staircase is on the side.


ARRANGEMENT FOR INTERMEDIATE FLOOR


50. Arrangement for Intermediate Floor. Fig. 46 is a plan for the starting and landing of two flights connected by a 12-inch cylinder; such an arrangement is used where the short flight ascends to an intermediate floor on the platform level.


QUARTER PLATFORM WITH TANGENT BETWEEN QUARTER CYLINDERS


51. Quarter Platform With Tangent Between Quarter Cylinders. Fig. 47 is a plan of a quarter-platform stairway for a continued hand rail. The cylinder opening of 18 inches is formed by two quarter circles, each of 5 inches radius, and an 8-inch piece of straight stringer between. By this method a platform is secured, and angular winders are dispensed with; the run of the stairway is also reduced.



QUARTER PLATFORM WITH SEMICIRCULAR CYLINDER


52. Quarter Platform With Semicircular Cylinder.
Fig. 48 differs from the preceding plan only in the form of its


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