In this chapter, you will learn how to quickly add a steel staircase, and some handrailing around the platform area of your 3D model.
Objectives
In this chapter, you will:
Use the Structural Element – S tairs command to add a staircase to the side of the platform area.
Use the Structural Element – Handrails command to add some handraili n g around the perimeter of the platform area.
Learn how to adopt dr ill patterns to su pporti n g members, and add bol ts when needed.
This manual presents fundamental concepts you need to know about the
modeling process in ProSteel 3D The tutorial is not necessarily best practice of structural steel design but focuses on using various ProSteel 3D commands.
P r o S t e e l 3 D 1 7 S t r u c t u r a l E l e m e n t s – S t a i r s & H a n d r a i l s
E X E R C I S E 16-1 A DDING A S T A I RC A S E
A Staircase is to be created on the right side of the platform structure. In this exercise we will use another structural element, the Staircase. The structural element bounding box (the yellow system lines) may be deleted and the staircase can then be altered to your individual needs.
In the example used in this exercise, we will need to add a supporting beam and column at the Gridline B end of the stair.
1. Add a 200UB29.8 support beam to the Portal Frame column at the Gridline B, Gridline 2 intersection. Use the dimension shown in the diagram below, and ensure that the top surface of the new beam matches the top surface level of the current beams around the platform area. Use an appropriate grouping command to group the new beam to the column on Gridline B.
2. Zoom in or out of the 3D model until you can see all of the Grid A to Grid B platform area. Then select the Stairs command icon from the ProSteel 3D Elements toolbar, or from the ProSteel 3D Structural Objects toolbar.
The Stairs command will prompt you to Pick a Startpoint for the Stairs.
Choose the absolute co-ordinate point 4925,-1000,0 as the start point for the stairs. When prompted for the stair direction, choose a point towards the rear of the platform. Ensure ortho is set to on when choosing this point.
3. When using the Stair command, a staircase is created using the last entered dimensions.
In the ProSteel 3D Stair dialog box, change the values to those as shown on the six tabs below:
Note: Not all values need to be input in the cells of the
Note: Handrail settings are best managed by the use of Templates. As you will see via the diagram at left, the Handrail settings have been stored and recalled via the
“Stair-Handrails” template.
Note: Bolts used for Handrail Stringers and Treads in this instance are 4.6/S bolts. If you cannot find these on the dropdown list available in the Shapes tab, then you will need to “add the bolt style definition” using the button on the ProSteel 3D Bolt Styles dialog box (BOLTING command).
P r o S t e e l 3 D 1 7 S t r u c t u r a l E l e m e n t s – S t a i r s & H a n d r a i l s
4. The handrails are automatically drawn along with the stairs, because the handrails tab on the ProSteel 3D Stair dialog box has values set which request the handrails.
5. Click the “Enables to Edit the settings for the Handrails” button on the Handrails tab of the ProSteel 3D Stair dialog box, and set the following values:
Note: Use the following Shape values:
Handrail = 42.2x3.2 CHS Posts = 48.3x3.2 CHS Upper Rail = 33.7x3.2 CHS Mid Rail (not used)
Lower Rail (not used) Kick Plate= 100x8 FLAT Filling Rods (not used)
6. You can now delete some of the handrail posts and rails at the top inside of the stairs, so that someone using the stairs can get access to the platform area.
Make sure that if you erase some posts, that you erase the appropriate post baseplate at the same time. You will be left with some holes in the top side of the stair stringers. You can remove the holes by zooming to the stringer, highlighting the stringer by picking it, and choosing PS3D Properties from the right click mouse button menu.
You are now presented with the Shape Properties dialog box, go to the Holes tab on that dialog box, highlight the appropriate hole using the arrow buttons on the bottom of the Holes tab, then hit the Delete button on the Holes tab. (Note the acquired holes will show as red holes, other holes on the same shape will show as white while on the holes tab) The holes can be deleted like this, one hole at a time per shape.
7. The stair stringers need to be connected to the 200UB30 support beam that we created at step 1 of this exercise.
Choose the Schearplate command icon from the ProSteel 3D Elements toolbar, follow the prompts to choose the stringer shape and its support shape then set the values as shown below. This needs to be done for each
P r o S t e e l 3 D 1 7 S t r u c t u r a l E l e m e n t s – S t a i r s & H a n d r a i l s
stringer. See the dialog box on the next page for the relevant values.
8. Now check each stair handrail post baseplate. These may need to be
shortened or adjusted for size, some bolts may need to be added or deleted, and some holes may need to be drilled or deleted. Use the commands you have learnt up to this stage to achieve this.
9. If you wish to you can add a support post under the end of stair support beam. Use a 75x5.0 SHS shape as the post. The post should be seated 150mm back from the outside end of the 200UB29 support beam.
Add a 300 x 150 x 20mm thick baseplate to the post, with two 28mm dia holes at 150 crs, for two M24 tie bolts, and allow for 40mm grout under.
Add a top connection to the underside of the 200UB29 support beam. Use an endplate connection with the following values.
240 x 140 x 12mm thick endplate, drill both parts for four M168.8/S bolts.
Bolt spacing to be 70 x 150mm.
Now check all of the members related to the stair, and adjust them if necessary. You may wish to shade your model and view from many angles using AutoCADs 3D Orbit feature. Save your 3D model to your hard disk.