U-Type Stair

Open—Creates an open riser stair as shown on the left in the illustration above.

Closed—Creates a closed riser stair as shown in the center in the illustration above.

Box—Creates a stair with closed risers and closed stringers on both sides as shown on the right in the illustration above.

Stringers—Creates stringers along the ends of the treads of the stairs. To modify the stringers’ depth, width, offset and spring from the floor, see Stringers rollout.

Carriage—Creates an inclined, notched beam under the treads which supports the steps or adds support between the stringers of the stairs. You might also know this as a carriage piece, a horse, or a roughstring. See Carriage rollout to modify the parameters.

Handrail—Creates left and right handrails. See Railings rollout to modify the handrails’ height, offset, number of segments, and radius.

Rail Path—Creates left and right paths you can use to install railings on the stairs. See Stairs for the instructions on how to do this.

Left/Right—Controls the position of the two flights (Length 1 and Length 2) relative to each other. If you select left, then the second flight is on the left from the landing. If you select right, then the second flight is the right from the landing.

Length 1—Controls the length of the first flight of stairs.

Length 2—Controls the length of the second flight of stairs.

Width—Controls the width of the stairs, including the steps and the landing.

Offset—Controls the distance separating the two flights and thus the length of the landing.

3ds Max keeps one Rise option locked while you adjust the other two. To lock an option, you click a push pin. To unlock an option you click a raised push pin. 3ds Max locks the spinner value of the parameter with the depressed push pin and allows the spinner values of the parameter with the raised push pins to change.

Overall—Controls the height of the flight of stairs.

Riser Ht—Controls the height of the risers.

Riser Ct—Controls the number of risers. There will always be one more riser than steps. This implied riser is between the top step of the stair and the upper floor.

Thickness—Controls the thickness of the steps.

Depth—Controls the depth of the steps.

Generate Mapping Coords—Applies default mapping coordinates to the stairs.

Note: If a visible viewport is set to a non-wireframe or non-bounding-box display, Generate Mapping Coordinates is on for all primitives to which you apply a material containing a map with Show Map In Viewport on. If all viewports are set to wireframe or bounding box, 3ds Max turns on Generate Mapping Coordinates for primitives containing mapped materials at render time.

Real-World Map Size—Controls the scaling method used for texture mapped materials that are applied to the object. The scaling values are controlled by the Use Real-World Scale settings found in the applied material's Coordinates rollout. Default=off.

These controls are available only when you turn on Stringers on the Parameters rollout > Generate Geometry group.

Depth—Controls how far down the stringers reach toward the floor.

Width—Controls the width of the stringers.

Offset—Controls the vertical distance of the stringers from the floor.

Spring from Floor—Controls whether the stringer starts at the floor, flush with the start of the first riser, or if the stringer extends below the floor. You control the amount the stringer extends below the floor with the Offset option.

These controls are available only when you turn on Carriage on the Parameters rollout > Generate Geometry group.

Depth—Controls how far down the carriage reaches toward the floor.

Width—Controls the width of the carriage.

Carriage Spacing—Sets the spacing of the carriage. When you pick this button, the Carriage Spacing dialog displays. Specify the number of carriages you want using the Count option. For more information on spacing options in this dialog, see Spacing Tool.

Spring from Floor—Controls whether the carriage starts at the floor, flush with the start of the first riser, or if the carriage extends below the floor. You control the amount the carriage extends below the floor with the Offset option.

These controls are available only when you turn on one or more of the Handrail or Rail Path options on the Parameters rollout > Generate Geometry group. Also, Segments and Radius aren't available if neither of the Handrail options is on.

Height—Controls the height of the railings from the steps.

Offset—Controls the offset of the railings from the ends of the steps.

Segments—Controls the number of segments in the railings. Higher values display smoother railings.

Radius—Controls the thickness of the railings.