Bowman-Sapolinski
Luminance Reflectance Value Calculator (LRV)
Calculated contrast will appear here
Suitable for building elements such as doorways, stair nosings, toilet seats and TGSIs (minimum 30% contrast).
✔ Pass
✘ Fail
Suitable for Discrete TGSIs Discrete TGSIs Individually installed tactile studs with the same luminance across their tops and sloping sides. (minimum 45% contrast).
✔ Pass
✘ Fail
Suitable for Composite discrete TGSIs Composite discrete TGSIs Individually installed tactile studs with different luminance on their tops and sloping sides, commonly achieved with a contrasting insert. (minimum 60% contrast).
✔ Pass
✘ Fail
Reference: AS/NZS 1428.4.1:2009, Clause 2.2(b)(ii) for the 45% requirement and Clause 2.2(b)(iii) for the 60% requirement.
The Bowman-Sapolinski Equation is used to calculate the LRV readings, in line with Part B4 of AS 1428.1 (2009) and Part E3 / E5 of AS/NZ 1428.4.1 (2009).
The equation is of the form C = 125 (Y2 − Y1)/(Y1 + Y2 + 25). C is equal to the calculated contrast, and Y1 and Y2 refer to the luminous reflectance values (LRV) of the two surfaces to be calculated. Y1 is to be darker than or equal to Y2.
Slope & Gradients Calculator
Disclaimer: Use the Calculator at your own risk. Access Studio shall not be held liable for use of the Calculator.
- LRV Calculator
-
Luminance Reflectance Value Calculator (LRV)
Calculated contrast will appear hereSuitable for building elements such as doorways, stair nosings, toilet seats and TGSIs (minimum 30% contrast).
✔ Pass ✘ FailSuitable for Discrete TGSIs Discrete TGSIs Individually installed tactile studs with the same luminance across their tops and sloping sides. (minimum 45% contrast).
✔ Pass ✘ FailSuitable for Composite discrete TGSIs Composite discrete TGSIs Individually installed tactile studs with different luminance on their tops and sloping sides, commonly achieved with a contrasting insert. (minimum 60% contrast).
✔ Pass ✘ FailReference: AS/NZS 1428.4.1:2009, Clause 2.2(b)(ii) for the 45% requirement and Clause 2.2(b)(iii) for the 60% requirement.
The Bowman-Sapolinski Equation is used to calculate the LRV readings, in line with Part B4 of AS 1428.1 (2009) and Part E3 / E5 of AS/NZ 1428.4.1 (2009).
The equation is of the form C = 125 (Y2 − Y1)/(Y1 + Y2 + 25). C is equal to the calculated contrast, and Y1 and Y2 refer to the luminous reflectance values (LRV) of the two surfaces to be calculated. Y1 is to be darker than or equal to Y2.
- Slope & Gradients Calculator
-
Slope & Gradients Calculator
For example, enter 14 for a gradient of 1:14.Disclaimer: Use the Calculator at your own risk. Access Studio shall not be held liable for use of the Calculator.
Our Reviews
Tharani
4 years ago
David Goss
4 years ago
We've worked with Access Studio on various projects and their expertise has been invaluable. In each case we have dealt with the team, they have been able to come up with a practical and efficient solution to some complex layouts.
Adam Blunt
4 years ago