. Cyclopedia of architecture, carpentry, and building; a general reference work ... e of the larger cities. The use of heavy newel postsinstead of curtail steps, is the prevailing style at present. In laying out geometrical stairs, the steps are arranged on prin-ciples already described. The well-hole in the center is first laid downand the steps arranged around it. In circular stairs with an open well-hole, the handrail being on the inner side, the width of tread for thesteps should be set off at about 18 inches from the handrail, thisgiving an approximately uniform rate of progress for anyon
. Cyclopedia of architecture, carpentry, and building; a general reference work ... e of the larger cities. The use of heavy newel postsinstead of curtail steps, is the prevailing style at present. In laying out geometrical stairs, the steps are arranged on prin-ciples already described. The well-hole in the center is first laid downand the steps arranged around it. In circular stairs with an open well-hole, the handrail being on the inner side, the width of tread for thesteps should be set off at about 18 inches from the handrail, thisgiving an approximately uniform rate of progress for anyone ascendingor descending the stairway. In stairs with the rail on the outside, assometimes occurs, it will be sufficient if the treads have the properwidth at the middle point of their length. Where a flight of stairs will likely be subject to great stress andwear, the carriages should be made much heavier than indicated in / \ a i ^^ 4 ^ 11 1L \ B A D s s s 5 S 5 -*> , I ?—^ Pig. 68. Under Side of Half-Space Stair, withCarriages and Cross-Carriages. 304 STAIR-BUILDING 41. Fig. 69. Method of Reinforcing Stair. the foregoing figures; and there may be cases when it will be necessaryto use iron bolts in the sides of the rough strings in order to give themgreater strength. This necessity, however, will arise only in the case of stairs built in public buildings,churches, halls, factories, ware-houses, or other buildings of a simi-lar kind. Sometimes, even in housestairs, it may be wise to strengthenthe treads and risers by spikingpieces of board to the rough string,ends up, fitting them snugly againstthe under side of the tread and theback of the riser. The method of doing this is shown in Fig. 71, inwhich the letter 0 shows the pieces nailed to the string. Types of Stairs in Common Use. In order to make the studentfamiliar with types of stairs in general use at the present day, plansof a few of those most likelyto be met with will now begiven. Fig. 72 is a plan of astraight st
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