The Stair Treads window
- Settings applied here, to the Stair Treads , are stored in your current Fabricator .
1 . Open this window
Pan ( )
--- "Type of tread" = 'Pan'
--- Shape
--- Thickness and Grade
--- Nosing
--- Pan
--- Tread support
--- RemarksGrating (
--- "Type of tread" = 'Grating'
--- Grade
--- Bearing bars
--- Cross bars
--- Holes
--- End plates
--- RemarksPlate (
--- "Type of tread" = 'Plate'
--- Shape
--- C-shaped (up and down)
--- Cold formed channel
--- Other
--- Rolled channel
--- Rolled cold formed channel
--- Tread support
--- Holes
--- RemarksContinuous (
--- "Type of tread" = 'Continuous'
--- Tread settings
--- Tread support
--- Remarks
Also see :
- Intermediate tread schedule ( Stair Edit window, Modeling , where a stair tread definition is applied) ( )
- Cut Stair and Handrail Detailing Time in Half (YouTube) ( )
Configuring stair tread :
1 . Open the Stair Treads window using any one (1) of the following methods:
Method 1 : Home > Project Settings > Fabricator > Stair Treads .
Methods 2, 3 & 4 : In Modeling or the Drawing Editor , choose Settings > Fabricator Settings > Stair Treads (classic), or use a keyboard shortcut , or click the icon.
2 . The Stair Treads window opens. A selection widget of 16 tread definitions runs along the left edge of the window.
2a : Select the stair tread definition (1 through 16) that you want to review or configure.
3 . The tread definition that you selected in 2a has a " Type of tread " and a " Name ." You can optionally change the type or name.
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Type of tread: Pan or Grating or Plate or Continuous . Be careful when changing the " Type of tread ." If the tread definition that you have selected is in current use for a stair, then changing the " Type of tread " will result in dramatic changes to that stair the next time it undergoes Process and Create Solids .
If ' Pan ' is selected, see Bent Pan Stair Tread .
If ' Grating ' is selected, see Grating Stair Tread .
If ' Plate ' is selected, see Plate Tread Setup .
If ' Continuous ' is selected, see Continuous Stair Tread .
Name : A string of up to 30 characters. When you change the name of a stair tread definition, all references to the previously entered name are changed throughout the program.
Original stair tread definition name: New name:
Stair tread 2
Bolted Grating For example, the name that is entered here is also the tread definition name that is currently selected on this window's tread definition selection widget (step 2).
After you press " OK ," any new name that you have entered here is also shown in the list boxes for " Intermediate tread schedule " and " Top tread schedule " and " Bottom tread schedule " on the Stair Edit window.
Any of the 16 available tread definitions that you can set up on this window can be renamed at any time. SDS2 validation prevents you from entering the same name twice. It also prevents you from entering disallowed characters such as ) and ( .
4 . Either repeat steps 2 & 3 to edit/review another stair tread definition, or press one of the following buttons:
"OK" (or the Enter key) closes the Stair Tread Setup window and saves the settings on it to the current Fabricator . Once a stair tread definition has been saved, you can then apply that definition to the " Intermediate tread schedule " on the Stair Edit window in Modeling so long as that Fabricator remains your current Fabricator.
"Cancel" (or the Esc key) closes this window without saving any changes that you might have made to it.
"Reset" undoes all changes made to this window since you first opened it. The window remains open.
Bent Pan Stair Tread
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Type of tread: Pan or Grating or Plate or Continuous . See " Type of tread ."
When ' Pan ' is selected, the following fields will be active.
For ' Grating ' see Grating Stair Tread .
For ' Plate ' see Plate Stair Tread .
For ' Continuous ' see Continuous Stair Tread .
Also see: " Add CNC marks to stringers " on the Stair Edit window lets you instruct the program to automatically add CNC marks to the inside faces of stringers to facilitate proper alignment of treads or tread supports.
Name: See " Name ."
| Shape: |
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| Description: | straight nosing with no bend | straight nosing with back bend | straight nosing with sanitary cove |
| Shape: |
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| Description: | beveled nosing with no bend | beveled nosing with back bend | beveled nosing with sanitary cove |
| Shape: |
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| Description: | 45 degree nosing with no bend | - | 45 degree nosing with sanitary cove |
| Shape: |
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| Description: | square nosing with no bend | - | square nosing with sanitary cove |
| Note: After selecting the shape that you want, make appropriate entries for options under " Thickness " " Nosing " " Pan " and " Tread support ." The " Sanitary cove width " field only applies to shapes with a sanitary cove. |
Plate thickness: The thickness (in the primary dimension " Units " or other units ) of plate material to be used for the bent plan stair tread.
To enter gage plate: Type in the ' gage number' followed by ' ga ' (example: ' 4ga ' is rewritten as ' 4GA ' when you Tab out of the field). Right-click tells you the stored thickness (based on industry standards), from which the weight of the gage plate is calculated. Allowable gages are any whole number from 3 to 38 . You can also enter an exact decimal thickness to get the gage (example: ' .1345 ' becomes ' 10GA ' when you Tab out of the field). The " Description " for a gage plate follows the format: ' bent plate prefix ' + ' numberGA ' + ' x ' + ' width ' (example: BPL16GAx15 1/2 ).
Grade: A36 or A572 or etc. The grade of steel for the bent plate layout material that is used to model the pan treads.
Setup: If the grade of steel you want is not shown on the list box (
), you can use Home > Project Settings > Job > Plate Grades to add it to the list.
Bent Plate Layout window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
Depth: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the top edge of the nosing to the back bend.
Return top: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the top nosing bend to the nearest vertical edge. In other words, this is the length of the top edge of the nosing.
Return bottom: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the top nosing bend to the main bend or the first intermediary bend.
Abrasive setback: The distance ( vertical ) (in the primary dimension " Units " or other units ) that the pan treads are to be offset from the workline of the stair. An " Abrasive setback " of ' 0 ' aligns the nosing line with the workline of the stair. Typically an " Abrasive setback " is applied in order to model the space that is needed to accommodate abrasive nosing material.
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| In the right example, the " Abrasive setback " is ' 25 ' mm (1 inch), which is a very large distance given the typical purpose for which the " Abrasive setback " is provided. The setback was made so large in this example so that you could more easily see it. |
------ Pan ------
Depth: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the top of the pan to the top of the adjacent nosing return (as illustrated below).
For a pan with a sanitary cove, this is the vertical distance from the top of the pan to the inside (middle) bend of the sanitary cove.
The " Pan depth " and " Sanitary cove width " together position the sanitary cove.
Return length: The distance ( actual ) (in the primary dimension " Units " or other units ) from the pan return bend to the top edge of the pan return.
Sanitary cove width: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the sanitary cove's inside bend to its upper bend. You may enter a value of 0 (zero) if you do not want a sanitary cove.
------ Tread support ( for pan tread ) ------
Type: None or Single support or Dual supports or Bent plate . For a choice other than ' None ', be sure to enter an appropriate " Material description ."
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' None ' instructs the stair program to not generate support material for the bent pan treads.
' Single support ' results in a single support (angle, plate, bar) for each side (NS and FS) of each tread. The " Material description " (below) sets whether the support is an angle, plate or bar and also specifies the thickness and width of the support. The positioning and length of the support is calculated automatically based on the tread geometry and can be reviewed (and, if needed, adjusted) under " Tread support settings " on a Stair Edit window in which this stair tread definition is specified.
' Dual supports ' results in two angles, plates or bars for each side of the pan (NS and FS), one to support the pan, the other to support the riser. The " Material description " (below) sets whether the supports are angles, plates or bars and also specifies the thickness and width of the supports. The positioning and length of the supports are calculated automatically based on the tread geometry and can be reviewed (and, if needed, adjusted) under " Tread support settings " on a Stair Edit window in which this stair tread definition is specified.
' Bent plate ' results in a NS bent plate and FS bent plate as supports for each pan tread. The " Material description " (below) sets the width and thickness of the bent plate. The " Dimension tread face " together with the " Dimension riser face " set the length of the bent plate.
Also see: " Add CNC marks to stringers " on the Stair Edit window lets you instruct the program to automatically add CNC marks to the inside faces of stringers to facilitate proper alignment of treads or tread supports.
Material description: An angle section size ( angle ) or plate description ( plate ) or flat bar description ( flat bar ) or bent plate description . This applies when ' Single support ' or ' Dual supports ' has been selected as the " Tread support type ."
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) icon next to " 
) when the tread support " Material description " is changed to flat bar (FL3/8x3/4). Since the change was made on the Stair Edit window -- not in Fabricator Setup -- the setup version of the tread definition remains unchanged. The change made to " Material description " is saved in a copy of the tread definition that is stored with the stair that is being edited. (Recorded in An angle section size may be designated by pressing the "file cabinet" browse button (
) and double-clicking any section that is on the list of available angle materials that are in the local shape file . Alternatively, you can type in the section size that you want (e.g., ' L1x1x1/8 '). " Add bolts to tread support " on the Stair Edit window gives you the ability to bolt the vertical leg of a tread support angle to the stringer when the tread support " Type " is ' Single support '.
A plate description is designated by the "Plate" prefix + thickness x width . For example, PL1/4x1 , where PL is the plate prefix.
A flat bar description is designated by the "Flat bar" prefix + thickness x width . For example, FL1/4x1 , where FL is the flat bar prefix.
A bent plate description can be a flat bar description (e.g., FL1/8x1 ) or a plate description (e.g., PL 1/8x1 ). Either description results in a bent plate being generated in the model. The " Material length " and " Material thickness " of the bent plate is specified in this description.
Dimension tread face: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the inside face of the riser to the end of the bent plate leg that attaches to the tread. This applies when ' Bent plate ' is selected as the " Type " of pan tread support. On the bent plate material in the model, the " Dimension tread face " is the " Length leg 1 " of the bent plate.
Dimension riser face: The distance ( diagonal ) (in the primary dimension " Units " or other units ) from the end of the bent plate leg that attaches to the riser to the heel of the tread. This applies when ' Bent plate ' is selected as the " Type " of pan tread support. The " Dimension riser face " is measured parallel with the riser. On the bent plate material in the model, the " Dimension riser face " is the " Length leg 2 " of the bent plate.
Long leg to: Stringer or Tread . This applies when an angle with unequal legs has been entered as the " Material description ." If the legs of the angle are equal, the choice made here does not matter.
' Stringer ' designates at the long leg of the angle is the leg that bolts to the stringer. The leg to stringer is the vertical leg in the installed angle.
' Tread ' designates that the long leg of the angle is the leg that supports the tread. The leg to tread is the horizontal leg in the installed angle.
Remarks ( BOM ): Any string (up to 23 characters) may be entered. The string of characters might, for example, be the name of the company from which the tread will be purchased, or the tread's part number. The characters entered here populate the " Remarks " column in the bill of material of any stair that uses this stair tread definition. Updating of the bill of material takes place during Detail Members .
Bolted or Welded Grating Stair Tread
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Type of tread: Pan or Grating or Plate or Continuous . See " Type of tread ."
For ' Pan ', see Bent Pan Stair Tread .
If ' Grating ' is selected, the following options apply. Grating stair tread can be bolted or welded. Welded grating tread has a " Bolt diameter " of ' 0 '.
For ' Plate ', see Plate Stair Tread .
For ' Continuous ', see Continuous Stair Tread .
Name: See " Name ."
Tread width: read-only . This tells you the width of the grating tread (in the primary dimension " Units ").
Grade: The steel grade that you want applied to the grating treads.
Setup: If the grade of steel you want is not shown on the list box (
Grating Tread Material window: Grating grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
Nosing width: The width of the nosing plate (in the primary dimension " Units " or other units ).
------ Bearing bars ------
Quantity: The count ( 1 or 2 or 3 , etc.) of bearing bars.
Spacing: The center-to-center distance ( horizontal ) (in the primary dimension " Units " or other units ) between one bearing bar to the next.
Thickness: The thickness ( horizontal ) (in the primary dimension " Units " or other units ) of any one bearing bar. All bearing bars will be this same thickness.
Depth: The depth ( vertical ) (in the appropriate " Units ") of any one bearing bar. All bearing bars will be this same depth.
------ Cross bars ------
Spacing: The center-to-center distance ( horizontal ) (in the primary dimension " Units " or other units ) from any one cross bar to the next cross bar.
Thickness: The thickness ( horizontal ) (in the primary dimension " Units " or other units ) of any one cross bar. All cross bars will be this same thickness.
Cross bar depth: ( vertical ) The height (in the primary dimension " Units " or other units ) of each cross bar.
For tread that is level, this distance will be the difference between the elevation of the top of the cross bar and the bottom of that same cross bar. All cross bars will be the depth you specify here.
------ Holes ------
Horizontal distance: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the end plate vertical edge nearest the nosing to the center of the nearest hole.
Vertical distance: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the horizontal edge of the end plate to the center of the hole nearest the nosing.
Horizontal spacing: The distance ( horizontal ) (in the primary dimension " Units " or other units ) between the centers of adjacent holes. In the example shown here, there are only 2 holes. Grating tread can have more than two holes if the " Tread width " is large enough to accommodate more holes.
Bolt diameter: The diameter (in the primary dimension " Units " or other units ) of the bolts that are to be inserted into the holes in the end plates.
Welded grating tread: A " Bolt diameter " of ' 0 ' results in grating stair tread without bolts and holes.
To make an entry: You can either type in the diameter of bolt, or select a bolt from the list (
Bolt diameter sets hole diameter: Standard round holes are automatically designed in the end plate. The diameter of these holes are calculated from the " Bolt diameter " per the selected " Connection design method ." For AISC design codes, refer to Table J3.3 or Table J3.3M ( AISC Thirteenth Edition , p. 16.1-105).
Bolt type: A307 or A325N or A325SC or A325X or etc. The type of bolt to be used for fastening the tread to the stair stringers.
------ End plates ------
Thickness: The thickness ( horizontal ) of the end plate (in the primary dimension " Units " or other units ).
Depth: The depth ( vertical ) of the end plate (in the primary dimension " Units " or other units ).
----- Remarks -----
Remarks ( BOM ): Any string (up to 23 characters) may be entered. The string of characters might, for example, be the name of the company from which the stair tread will be purchased, or the tread's part number. The characters entered here populate the " Remarks " column in the bill of material of any stair that uses this stair tread definition. Updating of the bill of material takes place during Detail Members .
Plate Stair Tread
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Type of tread: Pan or Grating or Plate or Continuous . See " Type of tread ."
For ' Pan ', see Bent Pan Stair Tread .
For ' Grating ', see Grating Stair Tread .
If ' Plate ' is selected, the following options apply.
For ' Continuous ', see Continuous Stair Tread .
Name: See " Name ."
----- Shape -----
Shape: C-shaped (up or down) or Cold formed channel or Other or Rolled channel or Rolled cold formed channel or Rolled cold formed z .
' C-shaped (up or down) ' give you " C-shaped " options. The tread points down in the model if ' C-shaped (down) ' is selected. The Riser Closure Plate custom component can add toe plates or closure plates to stairs with ' C-shaped (down) ' treads, but not with ' C-shaped (down) ' treads.
' Cold formed channel ' gives you " Cold formed channel " options.
' Other ' gives you " Other " options.
' Rolled channel ' gives you " Rolled channel " options. The Riser Closure Plate custom component can add toe plates or closure plates to stairs with ' Rolled channel ' treads.
' Rolled cold formed channel ' gives you " Rolled cold formed channel " options.
' Rolled cold formed z ' gives you " Rolled cold formed z " options.
----- C-shaped -----
Plate thickness: The thickness (" Material thickness ") (in the primary dimension " Units " or other units ) of the bent plate layout material that is used to model the C-shaped treads.
To enter gage plate: Type in the ' gage number' followed by ' ga ' (example: ' 4ga ' is rewritten as ' 4GA ' when you Tab out of the field). Right-click tells you the stored thickness (based on industry standards), from which the weight of the gage plate is calculated. Allowable gages are any whole number from 3 to 38 . You can also enter an exact decimal thickness to get the gage (example: ' .1345 ' becomes ' 10GA ' when you Tab out of the field). The " Description " for a gage plate follows the format: ' bent plate prefix ' + ' numberGA ' + ' x ' + ' width ' (example: BPL16GAx15 1/2 ).
Grade: A36 or A572 or etc. The grade of steel for the bent plate layout material that is used to model the C-shaped treads.
Setup: If the grade of steel you want is not shown on the list box (
Bent Plate Layout window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
If this box is checked (
), this C-shaped plate tread becomes a checkered plate, which is a steel plate with raised ribs on its top horizontal surface to prevent slippage on the stair treads. The " Plate thickness " of a checkered plate is measured exclusive of the raised pattern. The prefix set for " Checkered " in Member and Material Piecemarking is applied to the " Description " on the General Information window and in the member bill of material ( example: ' Pl3/8x10 ' becomes ' CHPL3/8x1) ' when ' CH ' is the prefix and it is set to " Append ... ." It becomes ' CH3/8x10 ' when not set to " Append... "). The " Weight of item " increases per Table 1-23 ( AISC Thirteenth Edition , p1-87) and also may depend on whether " Shop bill weight based on material " is set to ' Volume ' or ' Dimensions '. The plate will be detailed with a checkered pattern .
If the box is not checked (
), the C-shaped plate treads are considered to have smooth near-side surfaces.
Report Writer: XXXXX . CheckeredPlatePattern
Advanced Selection: CheckeredPlatePattern
Parametric module: CheckeredPlatePattern
Pattern setback: The distance ( vertical ) (in the primary dimension " Units " or other units ) that the C-shaped plate treads are to be offset from the workline of the stair. A " Pattern setback " of ' 0 ' aligns the nosing line with the workline of the stair.
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| In the right example, the " Pattern setback " is 51 mm (2 inches). |
Tread width: The distance ( horizontal ) (in the primary dimension " Units " or other units ) between the two outside corners of the heel of the C-shaped tread. On a C-shaped stair tread that has been installed, this distance is measured horizontally.
Depth: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the heel of the C-shaped stair tread to the toe of either of the two legs. Both legs of a C-shaped tread are this same depth. On a C-shaped stair tread that has been installed, this distance is measured vertically.
----- Cold formed channel -----
Plate thickness: The thickness (" Material thickness ") (in the primary dimension " Units " or other units ) of the bent plate layout material that is used to model the cold-formed channel treads.
To enter gage plate: Type in the ' gage number' followed by ' ga ' (example: ' 4ga ' is rewritten as ' 4GA ' when you Tab out of the field). Right-click tells you the stored thickness (based on industry standards), from which the weight of the gage plate is calculated. Allowable gages are any whole number from 3 to 38 . You can also enter an exact decimal thickness to get the gage (example: ' .1345 ' becomes ' 10GA ' when you Tab out of the field). The " Description " for a gage plate follows the format: ' bent plate prefix ' + ' numberGA ' + ' x ' + ' width ' (example: BPL16GAx15 1/2 ).
Grade: A36 or A572 or etc. The grade of steel for the bent plate layout material that is used to model the cold-formed channel treads.
Setup: If the grade of steel you want is not shown on the list box (
Bent Plate Layout window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
If this box is checked (
If the box is not checked (
Report Writer: XXXXX . CheckeredPlatePattern
Advanced Selection: CheckeredPlatePattern
Parametric module: CheckeredPlatePattern
Pattern setback: The distance ( vertical ) (in the primary dimension " Units " or other units ) that the cold-formed channel treads are to be offset from the workline of the stair. A " Pattern setback " of ' 0 ' aligns the nosing line with the workline of the stair.
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| In the right example, the " Pattern setback " is ' 51 ' mm (2 inches). |
Tread width: The distance ( horizontal ) (in the primary dimension " Units " or other units ) between the bends at the top of the cold-formed channel tread. .
Depth: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the top of the tread to the bend in the leg (either leg) of the cold-formed channel tread.
Inside leg: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from from the bottom bend in the vertical leg (either vertical leg) to the toe of the horizontal leg (either horizontal leg) of the cold-formed channel tread.
Plate thickness: The thickness (" Material thickness ") (in the primary dimension " Units " or other units ) of the bent plate layout material that is used to model the "other" type treads.
To enter gage plate: Type in the ' gage number' followed by ' ga ' (example: ' 4ga ' is rewritten as ' 4GA ' when you Tab out of the field). Right-click tells you the stored thickness (based on industry standards), from which the weight of the gage plate is calculated. Allowable gages are any whole number from 3 to 38 . You can also enter an exact decimal thickness to get the gage (example: ' .1345 ' becomes ' 10GA ' when you Tab out of the field). The " Description " for a gage plate follows the format: ' bent plate prefix ' + ' numberGA ' + ' x ' + ' width ' (example: BPL16GAx15 1/2 ).
Grade: A36 or A572 or etc. The grade of steel for the bent plate layout material that is used to model the "other" type treads.
Setup: If the grade of steel you want is not shown on the list box (
Bent Plate Layout window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
If this box is checked (
If the box is not checked (
Report Writer: XXXXX . CheckeredPlatePattern
Advanced Selection: CheckeredPlatePattern
Parametric module: CheckeredPlatePattern
Pattern setback: The distance ( vertical ) (in the primary dimension " Units " or other units ) that the "other" type treads are to be offset from the workline of the stair. A " Pattern setback " of ' 0 ' aligns the nosing line with the workline of the stair.
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| In the right example , the " Pattern setback " is ' 51 ' mm (2 inches). |
Tread width: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the nosing corner of the tread to the inside face of the riser.
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" Tread width " excludes the thickness of the riser leg. |
Nosing leg angle: The angle (in degrees) between the bottom of the tread and the inside face of the nosing leg. This angle must be 90 degrees or less (an acute angle).
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In this example, the " Nosing leg angle " is ' 90 ' degrees. |
Nosing leg: The distance ( actual ) (in the primary dimension " Units " or other units ) from the top of the tread to the bottom of the nosing leg.
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In this example, the " Nosing leg " length is measured vertically since the nosing leg is vertical. |
Riser leg: The distance ( actual ) (in the primary dimension " Units " or other units ) from the bottom of the tread to the top of the riser leg.
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In this example, the " Riser leg " length is measured vertically since the riser leg is vertical. |
Riser leg angle: The angle (in degrees) between the top of the tread and the inside face of the riser leg. This angle must be 90 degrees or greater (an obtuse angle).
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In this example, the " Riser leg angle " is ' 90 ' degrees. |
----- Rolled channel -----
Section size: A section for a channel material ( C or MC ) that is listed in the local shape file .
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To generate this example of rolled channel stair treads, a " Section size " of ' C10x20 ' was entered. |
To enter a section size: Either type in the section size that you want, or press the "file cabinet" browse button (
Grade: A36 or A572-42 or A588 or etc The grade of steel for the rolled section material that is used to model the rolled channel treads.
Setup: If the grade of steel you want is not shown on the list box (
Rolled Section Material window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
----- Rolled cold formed channel -----
Section size: A section for a cold formed channel material that is listed in the local shape file .
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To generate this example of rolled cold formed channel stair treads, a " Section size " of ' C714 ' was entered. |
Grade: A992 or A572-42 or A36 or etc. The grade of steel for the rolled cold formed channel treads.
Setup: If the grade of steel you want is not shown on the list box (
Rolled Section Material window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
----- Rolled cold formed z -----
Section size : A section for a cold formed z material that is listed in the local shape file .
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To generate this example of rolled cold formed z stair treads, a " Section size " of ' Z812 ' was entered. |
Grade : A992 or A572-42 or A36 or etc. The grade of steel for the rolled cold formed z treads.
Setup: If the grade of steel you want is not shown on the list box (
Rolled Section Material window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
----- Tread support ( for plate tread ) -----
Type: None or Single support . A tread support can be applied to any tread that can be defined when the " Type of tread " is ' Plate '.
' None ' gives you stair treads without supports.
' Single support ' places supports (plate, flat bar or angle) under the stair treads. Settings on this window such as " Material description ," " Long leg to " and " Length " control various characteristics of the supports.
Also see: " Add CNC marks to stringers " on the Stair Edit window lets you instruct the program to automatically add CNC marks to the inside faces of stringers to facilitate proper alignment of treads or tread supports.
Material description: A plate description or flat bar description or angle section size .
A plate description is designated by the "Plate" prefix + thickness x width . For example, PL1/4x2 , where PL is the plate prefix.
A flat bar description is designated by the "Flat bar" prefix + thickness x width . For example, FL1/4x2 , where FL is the flat bar prefix.
An angle section size may be designated by pressing the "file cabinet" browse button (
Long leg to: Stringer or Tread . This applies when an angle with unequal legs has been entered as the " Material description ." If the legs of the angle are equal, the choice made here does not matter.
' Stringer ' designates at the long leg of the angle is the leg that bolts to the stringer. This leg will be the vertical leg when the tread and its support are installed.
' Tread ' designates that the long leg of the angle is the leg that supports the tread. This leg will be the horizontal leg when the tread and its support are installed.
Length: The distance ( horizontal ) that the support, when installed, will be flush to the bottom of the tread. The angle, flat bar or plate support will be cut to this length.
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In this example, the support is an angle. The tread is a C-shaped plate. |
Setback: The distance ( horizontal ) from the nosing point to the support.
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In this example, the support is an angle. The tread is a C-shaped plate. |
----- Holes ( in plate tread support angles ) -----
| Warning : The message " Holes are not on support material " indicates that a stair in the model that uses this stair tread definition will not have any holes in its tread support angles. To clear this warning so that you get holes and bolts, you may, for example, need to select a different angle (" Material description "), or you may need to specify a different " Vertical distance ." |
Horizontal distance: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the corner of the support angle that is nearest the nosing point to the nearest hole in the angle.
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Holes are placed in the support angle's leg to stringer (the vertical leg). |
Vertical distance: The distance ( vertical ) (in the primary dimension " Units " or other units ) from the top face of the horizontal leg of the angle (the leg to the tread) to the nearest hole in the leg to the stringer.
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A " Vertical distance " that is too large may result in holes not being on the material. See the warning above. |
Horizontal spacing: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the center of one hole in the leg to the stringer to the center of the other hole in the leg to the stringer.
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The " Horizontal spacing " in this example is the " Length " of the angle minus twice the " Horizontal distance ." |
Bolt diameter: The diameter (inches or mm) of the shank of the bolt. This also sets the size of the two standard round holes that will be placed in the angle leg to the stringer (the vertical angle leg).
| diameter |
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' 0 ' results in no holes or bolts. Enter 0 if you want the angles to be welded to the stringers.
' 3/8 ' is the default bolt diameter. That diameter will only be shown in the list (
To enter a different bolt size: You can either type in a diameter or select a bolt diameter from the combo box (
Bolt type: A325 or A307 or etc. This is the type of bolt to be used for fastening the vertical leg of the plate tread angle support to the stringer.
Setup: If the bolt type that you want does not appear on the list box (
Remarks (BOM): Any string (up to 23 characters) may be entered. The string of characters might, for example, be the name of the company from which the stair tread will be purchased, or the tread's part number. The characters entered here populate the " Remarks " column in the bill of material of any stair that uses this stair tread definition. Updating of the stair's bill of material takes place during Detail Members .
Continuous Stair Tread
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Type of tread: Pan or Grating or Plate or Continuous . See " Type of tread ."
For ' Pan ', see Bent Pan Stair Tread .
For ' Grating ', see Grating Stair Tread .
For ' Plate ', see Plate Stair Tread .
If ' Continuous ' is selected, the following options become available.
Name: See " Name ."
----- Continuous tread settings -----
Plate thickness: The thickness (" Material thickness ") (in the primary dimension " Units " or other units ) of the bent plate layout material that is used to model the continuous stair treads.
To enter gage plate: Type in the ' gage number' followed by ' ga ' (example: ' 4ga ' is rewritten as ' 4GA ' when you Tab out of the field). Right-click tells you the stored thickness (based on industry standards), from which the weight of the gage plate is calculated. Allowable gages are any whole number from 3 to 38 . You can also enter an exact decimal thickness to get the gage (example: ' .1345 ' becomes ' 10GA ' when you Tab out of the field). The " Description " for a gage plate follows the format: ' bent plate prefix ' + ' numberGA ' + ' x ' + ' width ' (example: BPL16GAx15 1/2 ).
Grade: A36 or A572 or etc. The grade of steel for the bent plate layout material that is used to model the continuous stair treads.
Setup: If the grade of steel you want is not shown on the list box (
Bent Plate Layout window: Steel Grade
Bill of material: Steel Grade
Report Writer: MemberMaterial.Material.SubMaterial.MaterialGradeDescription
Advanced Selection: MaterialGrade
Parametric module: MaterialGrade
If this box is checked (
If the box is not checked (
Report Writer: XXXXX . CheckeredPlatePattern
Advanced Selection: CheckeredPlatePattern
Parametric module: CheckeredPlatePattern
Leg length: The distance ( actual ) (in the primary dimension " Units " or other units ) from the corner at the leg bend to the end of the leg.
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| In this example, the stair's " Bottom tread schedule " is set to 'Use Intermediate '. Consequently, the bottom tread leg length is the same as the leg length for the intermediate treads. |
Return top: The distance ( horizontal ) (in the primary dimension " Units " or other units ) from the top bend to the end of the top return. If ' 0 ' is entered, there will be no top return.
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| In this example, the stair's " Bottom tread schedule " and " Intermediate tread schedule " are both set to use the same tread definition. Consequently, the top return length is the same on each of the treads that are dimensioned. |
Return bottom: The distance ( horizontal ) (in the primary dimension " Units " or other units ) that you want the tread to be extended. A " Return bottom " of ' 0 ' makes the riser perfectly vertical.
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| In this example, the " Return bottom " is ' 51 ' mm (2 inches). if the " Return bottom " had been ' 0 ', the risers would be perfectly vertical and would align with the construction lines that are shown. |
Gap: The distance ( actual ) (in the primary dimension " Units " or other units ) from the riser for one tread to the leg for the adjacent tread that is immediately above that tread.
Clearance: The distance ( actual ) (in the primary dimension " Units " or other units ) from the top of a riser to the bottom of the adjacent tread that is immediately above that riser.
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The clearance is measured parallel with the riser. |
Pattern setback: The distance ( vertical ) (in the primary dimension " Units " or other units ) that the continuous stair treads are to be offset from the workline of the stair. A " Pattern setback " of ' 0 ' aligns the nosing line with the workline of the stair.
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| In the right example, the " Pattern setback " is ' 51 ' mm (2 inches). |
----- Tread support ( for continuous tread ) -----
Type: None or Single support or Dual support .
' None ' results in stair treads without supports.
' Single support ' places a tread support under the tread. The positioning and length of the support is calculated automatically and reported under " Tread support settings " on a Stair Edit window in which this stair tread definition is specified. Users can adjust the length and positioning of the tread support on that same edit window. Other support dimensions are specified here, on this window, by entering a " Material description ."
' Dual support ' puts a tread support under the tread and a riser support on the riser. The positioning and length of these supports are calculated automatically and reported under " Tread support settings " on a Stair Edit window in which this stair tread definition is specified. Users can adjust the length and positioning of the tread support on that same edit window. Other support dimensions are specified here, on this window, by entering a " Material description ."
Also see: " Add CNC marks to stringers " on the Stair Edit window lets you instruct the program to automatically add CNC marks to the inside faces of stringers to facilitate proper alignment of treads or tread supports.
Material description: A plate description or flat bar description or angle description .
A plate description is designated by the "Plate" prefix + thickness x width . For example, PL1/4x2 , where PL is the plate prefix.
A flat bar description is designated by the "Flat bar" prefix + thickness x width . For example, FL1/4x2 , where FL is the flat bar prefix.
An angle description may be designated by pressing the "file cabinet" browse button (
Long leg to: Stringer or Tread . This applies when an angle with unequal legs has been entered as the " Material description ." If the legs of the angle are equal, the choice made here does not matter.
Remarks (BOM): Any string (up to 23 characters) may be entered. The string of characters might, for example, be the name of the company from which the stair tread will be purchased, or the tread's part number. The characters entered here populate the " Remarks " column in the bill of material of any stair that uses this stair tread definition. Updating the bill of material takes place during Detail Members .