Stairs (S71)

Tekla Structures
2021
Tekla Structures

Stairs (S71)

Stairs (S71) creates straight stairs with optional top and bottom landings. The stairs consist of stringers, possible landings and the actual steps.

Objects created

  • Stringers
  • Steps
  • Landings (optional)
  • Brackets
  • Plates (optional)
  • Cuts (optional)
  • Bolts
  • Welds

Use for

Situation

Description

Stairs with horizontal top and bottom landings.

U pan profile steps with brackets.

Brackets are welded to the stringers and bolted to the steps.

Stairs with stringers notched to the supporting beam.

Steps are catalogue steps.

You may also use your own custom components as steps.

Before you start

If the stringers are notched, create the supporting beams before creating the stairs.

Selection order

  1. Pick a point to indicate the nosing point of the first step.

  2. Pick another point to indicate the nosing point of the last step.

    Note that the order in which the points are picked has no effect.

  3. Click the middle mouse button to create the stairs.

    If you have selected the following notched options on the Picture tab, select the supporting beams and then click the middle mouse button.

Part identification key

Part

1

Stringer

2

Step

3

Landings

Picture tab

Use the Picture tab to control the landing types, and the shape and the location of the stringers in relation to the points you pick when creating the stairs.

Top landing types

Option Description

Default

Horizontal

AutoDefaults can change this option.

Horizontal

Notched

The stringer top is on the supporting part. Vertical and horizontal plates are welded at the end of the stringer.

Bottom landing types

Option Description

Default

Horizontal

AutoDefaults can change this option.

Vertical

Creates a vertical landing where the lower point is on the top plane of the last step.

Horizontal

Creates a horizontal landing where the lower point is on the top plane of the last step.

Vertical lowered point

Creates a vertical landing where the lower point is at the top of steel or on the floor level.

Horizontal lowered point

Creates a horizontal landing where the lower point is at the top of steel or on the floor level.

Notched

Creates a notch to the bottom of the stringer. A vertical plate is welded at the end of the stringer.

Stair dimensions

Description Default

1

Define the distance between the upper point and the end of the left top landing.

If you set the value to 0 mm, the left top landing is not created.

If you set the top landing type to notched, define the cut dimension of the horizontal plate from the stringer edge.

0 mm

2

Define the vertical distance from the upper point to the top of steel of the top landing.

If the top landing is not created, the stringer top of steel is used.

If you set the top landing type to notched, define the vertical distance from the upper point to the stringer top horizontal cut.

200 mm

3

Define the maximum distance allowed between two consecutive steps.

The spacing between the steps is calculated using the step spacing type Exact or Equal, and the number of steps.

For example, if the step height should be 200 mm, the Exact setting creates steps of exactly this height (enter the number of steps as an integer). The Equal setting creates the required number of steps from the bottom to the top, with the height calculated as close to 200 mm as possible.

(Z*220)/(Z+220) mm,

where Z is the vertical distance between the 2 picked points.

4

Select the direction of the nosing dimension of the steps:

  • Vertical
  • Horizontal
  • Perpendicular

Define the nosing dimension of the steps. This dimension depends on the direction you have selected.

Vertical

0 mm

5

Define this dimension based on the selected bottom landing type:

  • Horizontal or horizontal lowered point bottom landing.

    Define the vertical distance from the lower point to the top of steel of the bottom landing.

  • Vertical or vertical lowered point bottom landing.

    Define the horizontal distance from the lower picked point to the most distant face of the bottom landing.

  • Notched bottom landing.

    Define the horizontal distance from the lower point to the stringer vertical cut. By default, the cut is made at the supporting part edge.

150 mm

6

Define the vertical dimension from the lower point to the first step.

You can define this dimension when the step spacing type is set to Equal and the bottom landing type is either vertical or horizontal lowered point.

Equal with vertical spacing between steps

7

Define the cut dimension of the vertical plate from the stringer edge.

You can define this dimension when the bottom landing type is set to notched.

0 mm

8

11

Define this dimension based on the selected bottom landing type:

  • Horizontal or horizontal lowered point bottom landing.

    Define the horizontal edge distance between the lower point and the bottom landing.

  • Vertical or vertical lowered point bottom landing.

    Define the vertical edge distance between the lower point and the lowest point of the bottom landing.

600 mm

9

Define the vertical gap between the lower supporting part and the stringer cut.

You can define this dimension when you have set the bottom landing type to notched.

0 mm

10

Define the horizontal gap between the lower supporting part and the stringer cut.

You can define this dimension when you have set the bottom landing type to notched.

0 mm

12

Define the dimension to shorten the steps equally on both sides.

0 mm

13

Define the width of the steps.

1000 mm

14

Define the horizontal gap between the upper supporting part and the stringer cut.

You can define this dimension when you have set the top landing type to notched.

0 mm

15

Define the vertical gap between the upper supporting part and the stringer cut.

You can define this dimension when you have set the top landing type to notched.

0 mm

16

Define this dimension based on the selected top landing type:

  • Horizontal top landing.

    Define the distance between the upper point and the end of the stringer.

  • Notched top landing.

    Define the horizontal distance between the upper point and the stringer vertical cut. By default the cut is made at the supporting part edge.

If you set this dimension to 0 mm, the top landing is not created.

0 mm

17

Select the step spacing type:

  • Exact creates the steps of exactly the defined height. Enter the number of steps as an integer.
  • Equal creates the required number of steps from the bottom to the top, with the height calculated as close as possible to the defined step height.

The spacing type controls how the vertical spacing between the steps is calculated.

If you select Exact and set the bottom landing type to horizontal or vertical lower point, the steps are spaced from the upper point to the lower point. In all other cases the steps are spaced from the lower point to the upper point.

Equal

18

Enter the number of steps.

This option depends on step spacing type and step spacing.

If you set the step spacing type to Exact, or to Equal and the spacing distance is not defined, Stairs (S71) creates the number of steps you have defined.

Stair set up tab

Use the Stair setup tab to control the part properties, top and bottom steps, position of the stairs on the horizontal plane, and rotation of stringers and steps.

Stair part properties

Part Description Default

1

Left stringer

Always created

Select a profile from the profile catalog.

BLU400*2

The default name is STRINGER.

1

Right stringer

Always created

Select a profile from the profile catalog.

BLU400*2

The default name is STRINGER.

2

Upper H plate

Created only if the top of the stringer is on the supporting beam.

6 mm

The default name is PLATE.

3

Upper V plate

Created only if the top of the stringer is on the supporting beam.

6 mm

The default name is PLATE.

4

Lower V plate

Created only if the bottom of the stringer is on the supporting beam.

6 mm

The default name is PLATE.

5

Catalogue step

Created only if Step type is set to Catalogue step. In this case, the U-pan steps, brackets, and bolts defined on the other tabs are ignored.

First profile from the Catalogue step list, defined in the steps.dat text file in the system folder. The list changes according to the selected environment.

The default name is STEP.

Option

Description

Default

Pos_No

Prefix and start number for the part position number.

Some components have a second row of fields where you can enter the assembly position number.

The default part start number is defined in the Components settings in File menu > Settings > Options.

Material

Material grade.

The default material is defined in the Part material box in the Components settings in File menu > Settings > Options.

Name

Name that is shown in drawings and reports.

Class

Part class number.

Finish

Describes how the part surface has been treated.

Stair setup settings

Option Description

Step type

  • Steps: The steps are created from the steel pan that is defined on the Steps tab.
  • Catalogue step: The steps are created from the profile defined in the Catalogue step option. The options on the Steps and Bracket tabs are not used.

Create assembly

Select which parts of the stair component form an assembly. The default is stringers.

Stringer reference line

  • Above: The line positioned on the inside of the stairs on the top face is used as the reference line.
  • Nosing: The nosing line of the steps is used as the reference line.

The reference line is used for workshop drawings.

Steps rotation

Rotation of the step around its axis. The default is Top.

Position in plane

Position of the stairs. The middle line of steps is used as the reference line. The default is Right.

Offset

Offset of the stairs on the plane from the position that is set in the Position in plane option.

The default offset is 0 mm.

Bolt Type

Select the bolt type for catalogue steps.

If you select the Workshop option, the bolts are shown in workshop assembly drawings in the list of workshop bolts.

Bolt tolerance

Define the bolt hole tolerance for catalogue steps.

Stringer rotation

Rotation of the stringer around its axis. The default is top .

Create top step

Define whether the first step of the stairs (the highest step) is created. By default, the first step is created.

Create bottom step

Define whether the last step of the stairs (the lowest step) is created. By default, the last step is created.

Steps tab

Use the Steps tab to control the shape and the size of U pan steps. Instead of a U pan, you can create the steps by using a catalog profile, or a custom part or component.

U-pan step dimensions

Description Default
1, 2, 10, 11

Define the chamfer values on both sides of the step.

Select the chamfer type to set the shape of the front and back corner of the step.

15 mm

3

Define the angle of the step relative to the horizontal line.

The angle can be positive or negative.

0 degrees

4, 12

Define the height of the step.

100 mm

5, 13

Define the length of the horizontal portion of the U pan.

50 mm

6, 7

Define the angle of the vertical portion of the step relative to the vertical line.

The angle can be positive or negative.

0 degrees

8

Define the thickness of the U pan step material.

10 mm

9

Define the width of the step.

Bracket length * 1/0.7

Step type

Option Description

Default

U pan legs up

AutoDefaults can change this option.

U pan legs up

U pan legs down

Custom

Define the custom profile options.

Custom profile

Option Description Default
Step profile

Select a profile from the profile catalog.

You can select a step profile when the Step type is set to custom and the Part name/Joint no. option has not been set.

PL100*80

The default name is STEP.

Part name/Joint no.

Select a custom part or a connection from the Applications & components catalog.

Attribute file

Select the attribute file.

standard

Vertical position

Select the vertical depth position of a step that is created as a custom part.

If you are using a custom connection, this option is not used.

Middle

Horizontal position

Select the horizontal on plane position of a step that is created as custom part.

If you are using a custom connection, this option is not used.

Middle

Option

Description

Default

Pos_No

Prefix and start number for the part position number.

Some components have a second row of fields where you can enter the assembly position number.

The default part start number is defined in the Components settings in File menu > Settings > Options.

Material

Material grade.

The default material is defined in the Part material box in the Components settings in File menu > Settings > Options.

Name

Name that is shown in drawings and reports.

Class

Part class number.

Finish

Describes how the part surface has been treated.

Bracket tab

Use the Bracket tab to set up brackets, and the connection between the brackets and the steps, and the brackets and the stringers. The brackets support the angle profiles under the steps.

Bracket

Part Description Default
L profile

To create an L profile, select a profile from the profile catalog.

BLL80*80*10

The default name is L_Profile.

Option

Description

Default

Pos_No

Prefix and start number for the part position number.

Some components have a second row of fields where you can enter the assembly position number.

The default part start number is defined in the Components settings in File menu > Settings > Options.

Material

Material grade.

The default material is defined in the Part material box in the Components settings in File menu > Settings > Options.

Name

Name that is shown in drawings and reports.

Class

Part class number.

Finish

Describes how the part surface has been treated.

Bracket dimensions

Description

1

Define the length of the bracket.

The default length is calculated according to the bracket-to-step or bracket-to-stringer bolt dimensions, depending on which are bigger.

2

Define the bracket offset dimension from the center line of the step.

The default is 0 mm.

Bracket-to-step connection

Define the properties of the bolts that connect the bracket to the step.

Description

1

Define the basic bolt basic properties:

  • Bolt size defines the bolt diameter. Available sizes are defined in the bolt assembly catalog.
  • Bolt standard defines the bolt standard to be used inside the component. Available standards are defined in the bolt assembly catalog.
  • Tolerance defines the gap between the bolt and the hole.
  • Thread in mat defines whether the thread may be within the bolted parts when bolts are used with a shaft. This has no effect when full-threaded bolts are used.

2

Select whether brackets are created or not.

3

Define the bolt group dimensions.

4

Select the connection type between the steps and the brackets:

  • Bolted

    Bolted is the default.

  • Welded

  • No connection

  • Plate bracket

    Bracket angle leg is not created.

  • Holes only

5

Select the bolt direction.

6

Define the slotted hole properties:

  • Slotted holes no. defines the number of slotted holes.
  • Hole type creates either Slotted holes, or Oversized or tapped holes.
  • Rotate slots rotates slots when the hole type is slotted.
  • Slots in defines in which parts the slotted holes are created.

7

Define the exact length of the bolts.

You can define the length of the bolts if the Step type is set to on the Steps tab.

8

Define the slotted hole dimensions.

Bracket-to-stringer connection

Define the properties of the bolts that connect the bracket to the stringer.

Description

1

Define the basic bolt properties:

  • Bolt size defines the bolt diameter. Available sizes are defined in the bolt assembly catalog.
  • Bolt standard defines the bolt standard to be used inside the component. Available standards are defined in the bolt assembly catalog.
  • Tolerance defines the gap between the bolt and the hole.
  • Thread in mat defines whether the thread may be within the bolted parts when bolts are used with a shaft. This has no effect when full-threaded bolts are used.

2

Define the bolt group dimensions.

3

Define the bolt assembl.

The selected check boxes define which component objects (bolt, washers, and nuts) are used in the bolt assembly. If you want to create a hole only, clear all the check boxes. To modify the bolt assembly in an existing component, select the Effect in modify check box and click Modify.

4

Define the slotted hole properties.

  • Slotted holes no. defines the number of slotted holes.
  • Hole type creates either Slotted holes, or Oversized or tapped holes.
  • Rotate slots rotates slots when the hole type is slotted.
  • Slots in defines in which parts the slotted holes are created.

5

Define the slotted hole dimensions.

6

Select the connection type between the stringer and the brackets:

  • Bolted

    Bolted is the default.

  • Welded

  • No connection

7

Select the bolt direction.

8

Set the bracket position of a plate bracket:

  • Below the step

    Below the step is the default.

  • Between the step and the stringer

You can use this option when you have set the connection type between the steps and the brackets to the plate bracket option .

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