In order to make the student familiar with types of stairs in general use at the present day, plans of a few of those most likely to be met with will now be given.

Fig. 72 is a plan of a straight stair, with an ordinary cylinder at the top provided for a return rail on the landing. It also shows a stretch-out stringer at the starting.

Fig. 73 is a plan of a stair with a landing and return steps.

Fig. 74 is a plan of a stair with an acute angular landing and cylinder.

Fig. 75 illustrates the same kind of stair as Fig. 74, the angle, however, being obtuse. Fig. 76 exhibits a stair having a half-turn with two risers on landings.

Fig. 77 is a plan of a quarter-space stair with four winders. Fig. 78 shows a stair similar to Fig. 77, but with six winders.

Fig. 69. Method of Reinforcing Stair.

Fig. 69. Method of Reinforcing Stair.

Fig. 70. Plan Showing One Method of Constructing Carriage and Trimming Winding Stair.

Fig. 70. Plan Showing One Method of Constructing Carriage and Trimming Winding Stair.

Fig. 71. Reinforcing Treads and Risers by Blocks Nailed to String.

Fig. 71. Reinforcing Treads and Risers by Blocks Nailed to String.

Fig. 72. Plan of Straight Stair with Cylinder at Top for Return Rail.

Fig. 72. Plan of Straight Stair with Cylinder at Top for Return Rail.

Fig. 79 shows a stair having five dancing winders.

Fig. 80 is a plan of a half-space stair having five dancing winders and a quarter-space landing. Fig. 81 shows a half-space stair with dancing winders all around the cylinder.

Fig. 82 shows a geometrical stair having winders all around the cylinder.

Fig. 83 shows the plan and elevation of stairs which turn around a central post. This kind of stair is frequently used in large stores and in clubhouses and other similar places, and has a very graceful appearance. It is not very difficult to build if properly planned.

The only form of stair not shown which the student may be called upon to build, would very likely be one having an elliptical plan; but, as this form is so seldom used - being found, in fact, only in public buildings or great mansions - it rarely falls to the lot of the ordinary workman to be called upon to design or construct a stairway of this type.

Fig. 73. Plan of Stair with Landing and Return Steps.

Fig. 73. Plan of Stair with Landing and Return Steps.

Fig. 74. Plan of Stair with Acute Angle Landing and Cylinder.

Fig. 74. Plan of Stair with Acute-Angle Landing and Cylinder.

Fig. 75. Plan of Stair with Obtuse Angle Landing and Cylinder.

Fig. 75. Plan of Stair with Obtuse-Angle Landing and Cylinder.

Fig. 76. Half Turn Stair with Two Risers on Landings.

Fig. 76. Half-Turn Stair with Two Risers on Landings.

Fig. 77. Quarter Space Stair with Four Winders.

Fig. 77. Quarter-Space Stair with Four Winders.

Fig. 79. Stair with Five Dancing Winders.

Fig. 79. Stair with Five Dancing Winders.

Fig. 78. Quarter Space Stair with Six Winders.

Fig. 78. Quarter-Space Stair with Six Winders.

Fig. 80. Half Space Stair with Five Dancing Winders and Quarter Space Landing.

Fig. 80. Half-Space Stair with Five Dancing Winders and Quarter-Space Landing.

Fig. 81. Half Space Stair with Dancing Winders all around Cylinder.

Fig. 81. Half-Space Stair with Dancing Winders all around Cylinder.