STAIRWAY DESIGN AND CONSTRUCTION. - Page 43 - Section 11 - Stair Building

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STAIRWAY DESIGN AND CONSTRUCTION.

start; with that end in view, the stairway is often widened adjacent to the newel by curving- out the front stringer 6 inches or more, and increasing the width of several of the treads by gracefully curving the riser.

In Fig. 34 is shown a plan of the first three steps of a stairway treated as suggested. On this plan the elevations of 3 of the risers and treads are projected in order to show the connection of the rail with the newel. Draw the bottom line of the rail through the points where the centers of the short balusters would occur, as at d d'; set off from ddr the thickness of the rail, 2 inches, and draw the center line of the rail ef. The tangents c b and c a on the plan are equal in length, and b is the point where the rail joins the newel.

Make eg equal in length to c b; draw gf, co, and ae, parallel to the riser lines; through o, draw hj at right angles to co. If the rail is brought to a level on the line oj, its height will be 9 inches from the bottom step i to the center of the rail at j. In this elevation the rail has been drawn below its real position a distance equal to the height of a short baluster, or 2 feet 2 inches. This distance, added to 9 inches, gives 2 feet 11 inches as the height of the newel, from the first step i to the center of the rail at/. If the rail is continued straight to f its height will be only 2 feet 5 inches. If the newel is designed to meet the requirements of a plan-of this character, it is important to determine the exact height where the eased rail will connect, and the foregoing description will enable the student to do so.


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