Guidance on how to comply with tactile indicators australia standards AS 1428.4
1. Does the facility need products with maximum self-retaining compliance to Australian standard 1428.4?
2. Or is maintenance to tactile indicators ok?
3. What is the colour of surrounding surfaces – ask your supplier for LRV before specifying. Be careful of white /light colour and black very dark colour mix carpets it is possible nothing will comply with them .
4. Full tiles (integrated tactiles ) need 30% contrast to area around them
5. Individual stud tactiles require 45% to the area beside them.
6. Top decks insert tops need 60% LVC . (many trains of thought on this) is it to the sides of individual stud or to the surrounding surface? You may need help here.
7. Do tactiles need to match stair nosing – check out our website here for matching nosings first.
8. All adhesive studs require care and maintenance industry practice is 10 % of studs will need to be replaced every year. Check your client is happy with this.
9. Will tactiles be in carpet? – then you need a crush test done which nova do, you can not use glue on carpets and can not use any tactiles. The non stud are needs to made equal to a hard surface.
10. Who will install tactiles, are they experienced, do they know the code? Many jobs have failed for instance in regional Melbourne or NSW.
11. Do you have grout lines or wood slat lines gaps, this is a nightmare and very difficult to make to Australian standard 1428.4. keep lines 90degrees to stairs or ramp better still use different substrate. The best option is rectified tiles as there is no gap to worry about although tactiles maybe moved past join to stop tile cracking.
12. Most Ceramic or porcelain projects will end up with a cracked tile this is not likely the taclile installers fault it is more likely bad bedding in of tile by tile installer, tiler should be made aware of the need for 100% bedding in contact to best standard possible in tactile zones. Tactile installer will likely recharge for reinstallion of bad bedding in of tiles, alternative is using NOVAPRODUCTS ultimate tactile service where tactiles are installed in the factory off site this has 99% success rate.
13. You must consider cleaning, if they never get clean then they will get dirty and may go out of contrast compliance quickly.
14. You must consider wear and tear and environmental effect and possible oxidisation eg brass TGSI this is bad in Sydney NSW where salty air travels in land.
15. Which way will pedestrians be walking, this changes the layout of tactiles.
16. If there is a 2 meter walk to the zone you may need 600mm deep zone, for fire stair cases you may not.
17. Have you asked the council and fire dept about fire stairs there is differing opinions in every shire.
18. If using a curved design you need to get a DAC to check layout before proceeding, you could easily get non compliance.
19. If there is 2 different colours of flooring eg tiles in a zone of tactiles you may not be able to use same tactile across zone. Keep flooring near tactiles either dark or light luminescence not both.
20. Stainless steel TGSI s last the longest but do not automatically comply with AS/NZ1428.4 – we need to consider Luminescent contrast .Tactile indicator zone must contrast or have luminescent difference not just colour difference , eg Gloss glass black may not contrast with a light grey . it is light and colour and gloss combined which give contrast.
Some bonus points –
21. Do you then need black stainless steel, PVD coated, but it is a coating so how long does PVD coating last, well it depends on quality of coating and thickness and PVD material used. It will wear off in time , then consider where the PVD coating wears, will it still be compliant. These products have been well used in Sydney and central coast but now showing failure of colour contrast.
22. You can use TOP DECK (black sinter / epoxy/ carborundum insert) but the contrast is more difficult to achieve.
23. A laymans way of checking contrast is to squint eyes until you can not see colours and then see if the tactile contrasts distinctly .It will look like a black and white photo, this is not an official test method and we take not liability for it , how ever if it does not stand out with contrast in this method it is an indication contrast is no good GET A Disabled access consultant to check for you either way a DAC should check before installation.
24. There is the Stainless steel TGSI shell , very economical and very quick install , once again check LRV values.
DISCLAIMER : Call Novaproducts in your state for further help .the above information is for social media purposes and is in no way to be used for any dispute or reliance upon for decision making.Normal disclaimer terms apply to this blog post . www.novaproducts.com.au