STAIRWAY DESIGN AND CONSTRUCTION. - Page 33 - Section 11 - Stair Building

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STAIRWAY DESIGN AND CONSTRUCTION.

be an easement introduced between the straight rail and the wreath piece.


ARRANGEMENT OF WINDERS


33. Arrangement of Winders. — In Fig. 24 are shown the plans of two different stairways brought together for comparison, each having one-quarter turn with an 8-inch cylinder and a continued hand rail. It will be seen that by the arrangement shown in (b) a platform is obtained, thus making the flight a much more desirable one. In plan (a)


there are 4 winders, differing but little from the plan shown in Fig. 23; while in (b) there are 3 winders with slightly curved ends. The 5 risers so changed in their arrangement in (b) take 4 inches more run than the plan with winders as shown. The placing of the carriage timbers in such stair­ways is a matter requiring care, as the strength and stability of the stairway largely depend thereon.


CARRIAGE TIMBER


34. Carriage Timbers. — In Fig. 25Fig. 25, 26. The plan of the top winders of a stairway and its elevation.Fig. 25, 26. The plan of the top winders of a stairway and its elevation. is shown the plan of the top winders of a stairway similar to that in Fig. 23Fig. 23. A stairway winding one-quarter turn at the top and bottomFig. 23. A stairway winding one-quarter turn at the top and bottom, a, b, and c being the principal timbers in position. The timber a is set in place after the stringers are put up, nailed to the floorbeam at d, and fastened to the wall at e. A piece of furring strip held in the direction ed, together with a straightedge tried along the line of the risers, will indicate the best position for this timber.


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