Stairs- Top and Bottom
Course: DD-001 | Length: 4:02 mins | Instructor: Dean Homicki
Chapters
00:26 - Learning Overview
01:24 - Learning Session
01:47 - Let’s Begin
03:26 - Learning Resources
Transcript
This learning session will cover the use of Warning TGSIs on:
Stairs- Top and Bottom
Welcome to staebl.academy TGSI Design Diagram 001. I’m Dean Homicki and I’ll be your guide for this course.
Learning Overview
Let’s review one type of use with TGSIs on a stairway and together extract what the Australian TGSI Standard requires of the situation.
Warning TGSIs Shall be set back 300 mm with a tolerance of +/-10 mm from the outer leading edge of the Stair Nosing, to a minimum depth of 600 mm, for the full width across the Path of Travel, and, must be perpendicular to the direction of travel.
TGSIs for this application shall also conform and perform, with the applicable Slip-Resistance & Luminance Contrast Requirements.
Here is a real-life situation of a Staircase showing the Top and Bottom with Discrete Warning TGSIs installed. We are going to now convert this image into a perspective line drawing and view how TGSIs have been used in this application. Here’s the line drawing of the image.
Learning Session
In this example, people can approach these set of stairs from various angles.
For the orientation of persons who are blind or vision impaired, applying this knowledge enables us to determine how to use TGSIs and conform to the Normative and Informative Guidelines of the Australian TGSI standards.
Let’s Begin
At the bottom of the Stairway, we have an ‘Open Area’ - that is, an area that is accessible at any angle of approach to the hazard. The hazard is the stair.
This applies to the Top of the Stair too, an ‘Open Area’ - that is, an area that is accessible at and any angle of approach to the hazard. The hazard is this situation is the stairway that pedestrians will use.
So, from the start of the leading edge of the Stair Nosing, or (the face of the Stair ‘Riser’ if the Stair nosing is recessed into the going (or step) of the stair, we require Warning TGSIs to be set back from the face of the stair or the edge of the stair nosing, 300 mm with a tolerance of +/- 10 mm for a minimum depth of 600 mm. This equates to 12 TGSI nodes at 50 mm spacings.
And, applied for the full width across the Path of Travel and, must be perpendicular to the direction of travel.
As the staircase has handrails installed on each side of the stairway, the TGSIs shall be installed in between the Handrails in this instance, as this is the accessible path of travel.
TGSIs for this application, also need to conform and perform, with the applicable Slip-Resistance and Luminance-Contrast Requirements. Warning TGSIs would also need to be installed at the Bottom of Stairway in the same manner.
And here is a real-life TGSI application once again
Learning Resources
That’s the conclusion for Warning TGSIs Stair Top and Bottom.
You can also access this course as a concise series of design diagrams in the resource section of our website staebl.academy/design. To access this resource now, click on the link below this video.
Thanks for joining me here at the staebl.academy. I look forward to guiding you through another learning session in the near future. Bye for now.
Listen
Click/Tap the audio player below to listen to the written transcript of this design session as an audible version. This is a streamed broadcast from the Staebl.academy site.
Diagrams
Click/Tap on an image from this learning session to view it as a larger picture. You will then be able to scroll through each individual design diagram in this slide-deck for a closer inspection.
Sources
TSA-TGSI-LEARN-DD-001 - This staebl.academy course module has drawn information from the following sources:
AS/NZS 1428.4.1: 2009 Design for Access and Mobility: Means to assist the orientation of people with a vision impairment - Tactile Ground Surface Indicators - Section 2, 2.1 (a), 2.2 (a) & (b), 2.3.1 General, 2.3.2, 2.3.3 (a), (b), (e), (f) & (g), 2.4 Paragraph 1, Fig 2.2 (B) Drawing (d), Fig 2.3 (A) Drawing (c), Fig 2.1 (a), (b) & (c) AMDT No.2 Dec 2014.
AS 1428.1: 2009 General Requirements for Access - New Building Work - 11 Stairways, 11.1 Stair Construction (a), (b), (d), (e), (f), (h) & Fig. (26a) & (26b), 11.2 Fig. 28 (a) & (b)
