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Reinforced concrete stair (95)

Last updated March 12, 2019 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2019

Reinforced concrete stair (95)

Reinforced concrete stair (95)

Reinforced Concrete(1) cast unit type where the concrete is formed, poured, and cured in its final position

(2) concrete structure which contains reinforcement designed on the assumption that the concrete and reinforcement act together in resisting forces

(2) Reinforcement in reinforced concrete is usually steel bars, wires, or welded wire fabric. It may also be structural fiber of some other material.

(2) In Tekla Structures, reinforced concrete is modeled with reinforcement objects.

Stair (95) creates reinforced concrete stairs.

Objects created

  • Stairs
  • Landings (optional)
  • Ridges (optional)
  • Stringers (optional)
  • Anti-skid (optional)
  • Main bars and stirrups of stair reinforcement ( Bar A - Bar L tabs) (optional)
  • Meshes in stairs and landings (optional)
  • Meshreinforcement that represents a mesh of steel bars in two perpendicular directions

    In Tekla Structures, the reinforcement mesh bars in one direction are called main bars and reinforcement mesh bars perpendicular to them are called crossing bars.

    bars (optional)
  • Anchor bars (optional)
  • Landing end bars (optional)

Use for

Situation Description

Reinforced concrete stairs.

Reinforced concrete stairs with chamfered steps, ridges and stringers.

Reinforced concrete stairs with reinforced landings.

Selection order

  1. Pick the first point to indicate the start point of the stairs.
  2. Pick the second point to indicate the direction of the stairs.
  3. Select any number of parts to be cut by the stairs (optional).
  4. Click the middle mouse button to create the stairs.

Parameters tab

Use the Parameters tab to control the shape of the stairs, number of steps, stair creation method and the stairs width.

Stair dimensions

    Description

1 Horizontal dimension of the steps area
2 Vertical dimension of the steps area
3 Step length
4 Step height
5 Shape options for stair bottom
6 Shape options for stair top
7 Stair width

Stair creation method

Option Description
P1 P2 step length Create stairs between points P1 and P2.

Stair dimension are defined by the distance between P1 and P2 and step length.

P1 P2 step height Create stairs between points P1 and P2.

Stair dimension are defined by the distance between P1 and P2 and step height.

P1 step length step height N steps Create stairs from point P1 to point P2.

Stair dimensions are defined by P1 and step height, length and number of steps.

P2 step length step height N steps Create stairs from point P1 to point P2.

Stair dimensions are defined by P2 and step height, length and number of steps.

P1 horizontal and vertical step distance Create stairs from point P1 to point P2.

Stair dimensions are defined by P1 and horizontal and vertical step distance.

P2 horizontal and vertical step distance Create stairs from point P1 to point P2.

Stair dimensions are defined by P2 and horizontal and vertical step distance.

Parts tab

Use the Parts tab to control the material, name, classpart property that groups parts according to identifiers given by the user

The identifiers of classes are usually numbers. Classes can be used for defining the color of parts in the model, for example. Class does not influence the numbering of model objects.

, positioning, cast unit typeproperty of a concrete part in a cast unit that defines if the structure type of the part is precast or cast in place

and step chamfering.

Step chamfer settings

Option Description
Middle for all All steps are chamfered according to the Middle steps settings.
Bottom different Bottom step is chamfered according to the 1st step at bottom settings.

All other steps are chamfered according to the Middle steps settings.

Top different Top step is chamfered according to the Last top step settings.

All other steps are chamfered according to the Middle steps settings.

Bottom and top different Bottom step is chamfered according to the 1st step at bottom settings.

Top step chamfered are according to the Last top step settings. All other steps are chamfered according to the Middle steps settings.

Step chamfer settings are set in the same way for 1st step at bottom , Middle steps and Last top step.

Option Description

Size of step cut is defined by the distance.

Size of step cut is defined by the angle.

Corner chamfer types

Corner chamfers 1. and 2. can be defined by the Radius x or by the sides of the Chamfer x, y.

Create finished floor level

Select whether to create finished floor level. The finished floor level is defined by a polygon created from an offset stairs polygon and it is used for drawings.

Define the profile, properties and offset of the dummy part that is created at each polygon vertex.

Stairs and landings tab

Use the Stairs and landings tab to control the size and type of the bottom landing and the top landing.

Bottom landing cut option

Option Description

Bottom landing with no cut.

Bottom landing with cut defined by its length and distance from the top side of landing.

Bottom landing with cut defined by its length and distance from the bottom side of landing.

Bottom landing with L shape cut defined by its three dimensions and distance from the top side of landing.

Bottom landing cut defined by a profile and its position in landing.

Top landing cut option

Option Description

Top landing with no cut.

Top landing with cut defined by its length and distance from the top side of landing.

Top landing with cut defined by its length and distance from the bottom side of landing.

Top landing with L shape cut defined by its three dimensions and distance from the top side of landing.

Top landing cut defined by a profile and its position in landing.

Landing dimensioning

  Description

Use the top view setting to define the dimensions of the bottom landing and the top landing.

Ridges tab

Use the Ridges tab to create horizontal and/or vertical ridges on both sides or only on one side of the stairs.

Dimensions

    Description

1 Thickness of the vertical ridge.
2 Width of the vertical ridge.
3 Width of the horizontal ridge.
4 Thickness/height of the horizontal ridge.

Horizontal ridges

Option Description
Create

Define whether horizontal ridges are created.

Create at foot

Define whether horizontal ridges are created at the foot of the stairs.

This option works in the same way as the Create option.

Chamfering

1Inside chamfer : Select the type of the inside chamfer and enter the required dimensions.

2Corner chamfer : Select the type of the corner chamfer and enter the required dimensions.

3Slope : Set the slope as an angle or a dimension. The slope makes the ridge inclined.

Foot corner chamfer Define whether corner chamfers are created at the stair foot.

Vertical ridges

Option Description
Create

Define whether vertical ridges are created.

Slope Set the slope as an angle or a dimension. The slope makes the ridge inclined.

Stringers tab

Use the Stringers tab to create the stringers and ridges on the left, right, or both sides of the stairs.

    Description

1 Height of the stringer bottom ridge.
2 Horizontal offset of the bottom ridge from the bottom step.
3 Height of the stringer top ridge.
4 Width of the stringer.
Slope Use to incline the inner surface of the stringers.

You can define the slope using an angle or a dimension.

Inside chamfer Define whether the inside edge of stringer is chamfered or not.
Outside chamfer Define whether the outside edge of stringer is chamfered or not.

Stringer height

Stringer height based on the total height or distance from inner/outer step corner.

Anti-skid tab

Use the Anti-skid tab to create slip resistant surfaces.

Option Description
Creation anti-skid Define whether anti-skids are created.
Create anti-skid on foot/top Define whether anti-skids are created at the stair foot/top.
Create cutout Define whether you want to create cutouts with the anti-skid profile. By default, the cutouts are not created.
Include in cast unit Define whether anti-skids are included in the cast unit.
Profile Define the anti-skid profile by selecting it from the profile catalog.
Rotation Select an option to rotate the anti-skid profile.

Bar A tab

Use the Bar A tab to define the geometry, concrete cover thickness, reinforcing barreinforcement that represents a steel bar used to reinforce a concrete structure

The steel bars are usually ribbed and they are used to increase the tensile strength of concrete.

spacing and reinforcing bar properties of a stair reinforcing bar groupgroup of reinforcing bars that are side by side and have identical properties, except the possible variation in bar lengths

.

Option Description

Geometry and concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Bar B tab

Use the Bar B tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Bar B bottom ending options

Define geometry and concrete cover thickness of the bar B bottom ending.

Option Description

Bar B simple bottom ending.

Bar B bottom ending bent once to fit the bottom footing of the stairs.

Bar B bottom ending bent twice to fit the bottom footing of the stairs.

Bar B bottom ending bent up to three times to fit the bottom footing of the stairs.

Bar B top ending options

Define geometry and concrete cover thickness of the bar B top ending.

Option Description

Bar B simple top ending.

Bar B top ending bent once to fit the top geometry of the stairs.

Bar B top ending bent twice to fit the top geometry of the stairs. Last leg length is defined by the cover thickness.

Bar B top ending bent twice to fit the top geometry of the stairs.

Reinforcing bar spacing

Option Description

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Bar C tab

Use the Bar C tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Geometry and concrete cover thickness.

Define which extra side bars are created, their end conditions, and the concrete cover.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Extra I bars

Option Description

The purple color in the dialog box represents the extra I bars.

Define whether to create the extra I bars. Select the check boxes next to the purple points.

Select the nose shape adaptation. The first check box (the dot on the left) creates the extra I bar and the second creates a hook on it.

Cover thickness of the reinforcing bars.

Bar D tab

Use the Bar D tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Geometry and concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Extra I bars

Extra I bars are straight bars crossing bar D. You can create up to four extra I bars.

Option Description

The purple color in the dialog box represents the extra I bars.

Define whether to create the extra I bars. Select the check boxes next to the purple points.

Cover thickness of the reinforcing bars.

Bar E tab

Use the Bar E tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Create options

Option Description
No Bar is not created.

Stirrup Bar is created as stirrup.

Pin Bar is created as pin.

Option Description

Geometry and concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Bar F tab

Use the Bar F tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group

Option Description

Geometry and concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Bar G tab

Use the Bar G tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Geometry and concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Extra I bars

Extra I bars are straight bars crossing bar G. You can create up to four extra I bars.

Option Description

The purple color in the dialog box represents the extra I bars.

Define whether to create extra I bars. Select the check boxes next to the purple points.

Cover thickness of the reinforcing bars.

Bar H tab

Use the Bar H tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Create option

Option Description

  • Do not create bar H
  • Create bar H
  • Create only bottom bar H reinforcing bar group

Bar H geometry option

Option Description

Two bent reinforcing bar groups. Define geometry and concrete cover thickness.

Top reinforcing bar group is straight, bottom reinforcing bar group is bent on both sides. Define geometry and concrete cover thickness.

Two bent reinforcing bar groups. Define geometry and concrete cover thickness.

Bar I tab

Use the Bar I tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Positioning, spacing and concrete cover thickness.

Concrete cover thickness of the reinforcing bar groups.

Bar J tab

Use the Bar J tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group. You can create several bar J reinforcing bar groups. Each group has its own color representationthe way that the information included in a model is represented visually

on the Bar J tab.

Color group options

Option Description

Use the color group option to define which combination of bar J reinforcing bar groups (blue, green, brown) is created.
Option Description

Positioning and concrete cover thickness for reinforcing bar groups based on the color representation.

Concrete cover thickness for all reinforcing bar groups.

Bar K tab

Use the Bar K tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Select the geometry and define the concrete cover thickness.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Extra I bars

Extra I bars are straight bars crossing bar K. You can create up to three extra I bars.

Option Description

The purple color in the dialog box represents the extra I bars.

Define whether to create extra I bars by selecting the check boxes next to the purple points.

Cover thickness of the reinforcing bars.

Bar L tab

Use the Bar L tab to define the geometry, concrete cover thickness, reinforcing bar spacing and reinforcing bar properties of a stair reinforcing bar group.

Option Description

Define whether an L shaped reinforcing bar group is created at the stair footing.

Define whether an L shaped reinforcing bar group is created at the stair top or whether all bars are created with the same geometry.

Define offsets for the reinforcing bar groups in the two top steps.

Define whether reinforcing bars are created between the top and bottom step.

Define geometry for reinforcing bar groups in all steps, except for the two top steps.

Spacing, number of bars and concrete cover thickness of the reinforcing bar group.

Bar L geometry options

The geometry options affect the middle and the bottom steps.

Option Description

L shape reinforcing bar groups.

L shape reinforcing bar groups with hooks.

Mesh picture tab

Use the Mesh picture tab to define bottom landing meshes, stair meshes and top landing meshes.

Side view

    Description

1 Bottom landing mesh (top). Define offsets and cover thickness of the mesh.
2 Bottom landing mesh (bottom). Define offsets and cover thickness of the mesh.
3 Stair mesh (top). Define offsets and cover thickness of the mesh.
4 Stair mesh (bottom). Define offsets and cover thickness of the mesh.
5 Top landing mesh (top). Define offsets and cover thickness of the mesh.
6 Top landing mesh (bottom). Define offsets and cover thickness of the mesh.

Top view

    Description

1 Cover thickness of bottom landing mesh (top).
2 Cover thickness of bottom landing mesh (bottom).
3 Cover thickness of stair mesh (top).
4 Cover thickness of stair mesh (bottom).
5 Cover thickness of top landing mesh (top).
6 Cover thickness of top landing mesh (bottom).

Mesh attributes tab

Use the Mesh attributes tab with the Mesh picture tab to define the properties, positioning and creation type of bottom landing meshes, stair meshes and top landing meshes.

Cross bar location

  Description

Cross bar above.

Cross bar below.

Creation type

  Description

Create mesh as reinforcement mesh.

Create mesh as two independent reinforcing groups.

Mesh bars tab

Use the Mesh bars tab to define the geometry, concrete cover thickness, reinforcing bar spacing, and reinforcing bar properties of the mesh bars in the top and bottom landing. You can create up to three reinforcing bar groups.

    Description

1 Cover thicknesses of all mesh bar groups in the stair bottom landing.

Use the color representation in the dialog box.

2 Vertical cover thicknesses of all mesh bar groups in the stair bottom landing.

Use the color representation in the dialog box.

3 Cover thicknesses of all mesh bar groups in the stair top landing.

Use the color representation in the dialog box.

4 Vertical cover thicknesses of all mesh bar groups in the stair top landing.

Use the color representation in the dialog box.

Bottom anchor bars tab

Use the Bottom anchor bars tab to define the geometry, concrete cover thickness, reinforcing bar spacing, and reinforcing bar properties of the bottom anchor bars. You can create up to three reinforcing bar groups.

Creation type

Option Description
No No reinforcing bar group created.
Type1 L shape anchor reinforcing bar group.

Type2 Simple straight anchor reinforcing bar group.

Top anchor bars tab

Use the Top anchor bars tab to define the geometry, concrete cover thickness, reinforcing bar spacing, and reinforcing bar properties of the top anchor bars. You can create up to three reinforcing bar groups.

Creation type

Option Description
No No reinforcing bar group created.
Type1 L shape anchor reinforcing bar group.

Type2 Simple straight anchor reinforcing bar group.

Z anchor bars tab

Use the Z anchor bars tab to define the geometry, concrete cover thickness, reinforcing bar spacing, and reinforcing bar properties of the Z anchor bars. You can create up to three reinforcing bar groups.

    Description

1 Cover thicknesses of all Z anchor bar groups in the stair bottom landing.

Use the color representation in the dialog box.

2 Vertical cover thicknesses of all Z anchor bar groups in the stair main part.

Use the color representation in the dialog box.

3 Cover thicknesses of all Z anchor bar groups in the stair top landing.

Use the color representation in the dialog box.

Bot L Length of the Z anchor bars that extend from the stair bottom landing.
Top L Length of the Z anchor bars that extend from the stair top landing.

Landing end bars tab

Use the Landing end bars tab to reinforce the stair landings and to define the geometry, concrete cover thickness, reinforcing bar spacing, and bar properties of the landing end bars.

Bottom end

Reinforcement of bottom landing.

    Description

1 Landing end bars. U-shape geometry follows the shape of the landing based on the defined cover thicknesses.

Color representation in the picture: blue, green.

2 Define whether to create extra cross bars. Select the check boxes next to the purple points.
3 Define whether to create extra cross bars. Select the check boxes next to the red points.

Top end

Reinforcement of top landing.

    Description

1 Landing end bars. U-shape geometry follows the shape of the landing based on defined cover thicknesses.

Color representation in the picture: blue, green.

2 Define whether to create extra cross bars. Select the check boxes next to purple points.
3 Define whether to create extra cross bars. Select the check boxes next to red points.

Side cover thickness

Option Description

Side cover thickness of all reinforcing bar groups defined on the Landing end bars tab.

UDA tab

Use the UDA tab to define user-defined attributes for the stairs. You can define multiple UDAs. UDAs can be used as filters, and they can be displayed in drawings and reports.

Configuration tab

Use the Configuration tab to define the default cover thicknesses and bending radiuses of all reinforcing bars created by Reinforced Concrete Stair (95).

Cover thickness for reinforcing bar groups A - C

Define the default cover thickness for reinforcing bar groups A - C.

Option Description
Value Default cover thickness defined by a value.
Rebar diameter Default cover thickness multiplied by reinforcing bar diameter.

General cover thickness bars D - L

Define the default cover thickness for reinforcing bar groups D - L and all reinforcing bars except the reinforcing bar groups A - C and meshes.

Option Description
Value Default cover thickness defined by a value.
Rebar diameter Default cover thickness multiplied by reinforcing bar diameter.

Bending radius

Define the default bending radius of all reinforcing bars.

Option Description
Rebar_database.inp Default bending radius defined by rebar_database.inp file.
Relative to diameter Default bending radius according to the reinforcing bar diameter.
Bending radius Default bending radius defined by value.

Mesh cover thickness

Define the default cover thickness for the meshes created by Reinforced Concrete Stair (95).

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