TGSI Design Requirements
Integrated Warning TGSIs
Course: DD-020 | Length: 5:30 mins | Instructor: Dean Homicki
Chapters
00:24 - Learning Overview
01:21 - Learning Session
01:40 - Let’s Begin
04:50 - Learning Resources
Transcript
This learning session will cover the use of:
Warning TGSIs and the Design Requirements for Integrated TGSI Types.
Welcome to staebl.academy TGSI Design Diagram 020. I’m Dean Homicki and I’ll be your guide for this course.
Learning Overview
We begin by asking,
‘How are Integrated TGSIs defined in the Australian TGSI Standard?’
The Australian TGSI Standard describes Integrated TGSIs as, ‘Tactile Ground Surface Indicators (TGSIs) that are in a defined pattern and which are of the same Luminance and material as the Base Surface.’
What are the Design requirements of Integrated TGSIs?
There are two types of Integrated TGSIs. These types are defined as Integrated Warning TGSIs and Integrated Directional TGSIs. In this learning session, we’ll review Integrated Warning TGSIs.
Learning Session
Let’s take a closer look at the technical details outlined in Figure 2.1, Amendment No.2, of the Australian TGSI Standard. A summarised version of these requirements follows herein.
Let’s Begin.
The Truncated Cones of Integrated Warning TGSIs, shall each have:
a height of: 4 to 5 mm above the entire Base Surface,
have a diameter at each base of: 35 +/- 1 mm,
have a diameter at each Upper Surface of: 25 +/- 1 mm and,
each be evenly spaced apart in a defined pattern of 50 +/- 1 mm, measured from the centre of each Truncate Cone.
Each Integrated Warning TGSI Module must have, Luminance-Contrast to the background, or, the adjacent Path of Travel as follows:
Integrated: Not less than 30% Luminance-Contrast across its entire area.
Each Integrated Warning TGSI Module shall be slip-resistant.
In Australia, to determine a TGSI’s slip-resistance rating and classification, the trafficable surface of the TGSI needs be tested in accordance with AS 4586: 2013 and, installed in conjunction with Standards Australia Handbook HB 198: 2014 - Guide to the specification and testing of slip resistance of pedestrian surfaces.
Let’s take a look at the dimensionality of Integrated Warning TGSIs. We are going to now convert this image it into a Plan view line drawing and reveal the dimensionality of the TGSI Arrangement. Here’s the line drawing of the image.
The Truncated Cones are evenly spaced apart in a defined pattern of 50 +/- 1 mm. These are measured from the centre of each Truncate Cone to the centre of adjacent Truncate Cone. The Truncate Cones must also be parallel to each other.
When Integrated TGSI modules are installed together, (side-by-side) or (end-to-end), it is important that the 50 +/- 1 mm spacing, between each of Truncated Cones, is maintained. This means that from the outer edge of the Integrated Warning TGSI module to centre of the Upper Surface of the Truncated Cone, the spacings will be 25 +/- 1 mm. This measurement will also achieve the correct arrangement (Pattern) of Integrated Warning TGSIs with Figure 2.1 of the Australian TGSI standard.
In an Elevation View of the Integrated Warning TGSIs, we can see that, the Height of each Truncated Cone is 4 to 5 mm, that the Upper Surface Diameter is 25 +/- 1 mm, and that the Base Surface Diameter 35 +/- 1 mm.
Learning Resources
That’s the conclusion for the Design Requirements of Integrated Warning TGSIs.
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-020 - This staebl.academy course module has drawn information from the following sources:
AS/NZS 1428.4.1: 2009 (Amendments 1 & 2) Design for Access and Mobility: Means to assist the orientation of people with a vision impairment - Tactile Ground Surface Indicators - Clause 1.4.12 (AMDT No. 1 NOV 2010), Section 2, 2.2 (b) & (b i), 2.3.1. (c) & (d), Section 3, 3.2 General Requirements, 3.2.2 Design Requirements, 3.2.3, Fig 3.1 (a), (b) & (c) AMDT No.1 NOV 2010, Appendix E.E2 Luminance Contrast Requirements - 1st and 2nd Paragraph, Appendix A1 Wayfinding (b).
