The graphs on pages 4 to 14 show the AS3700 formulae for each of these conditions.

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1 AustraLite Fire Resistance Levels In , a series of fire tests were done on what is now known as AustraLite masonry. When calculated to the requirements of AS3700:2011, Section 6, they were proved to achieve much higher Fire Resistance Levels (FRLs) than standard concrete masonry units: Structural Adequacy FRL: The Slenderness ratio (S rf ) of a proposed wall is calculated by the formulae in AS3700, Clause factoring the wall s spanning height/length, thickness and which edges are restrained. The maximum S rf s for AustraLite are: 60 minutes: Loadbearing minutes: Loadbearing minutes: Loadbearing minutes: Loadbearing minutes: Loadbearing The graphs on pages 4 to 14 show the AS3700 formulae for each of these conditions. Integrity FRL: The test (EWFA ) of a 90mm wall with S rf = achieved a 240- minute Integrity FRL. According to AS3700, Clause 6.4.3, AustraLite masonry with t > 90mm and S rf < will achieve a 240-minute Integrity FRL. S rf = S rf = Austral Masonry NSW Page 1

2 The Loadbearing test (EWFA ) of 110mm AustraLite with S rf = achieved a 240- minute Integrity FRL Loadbearing AustraLite walls with t > 110mm & S rf < achieve a 240-minute Integrity FRL. S rf = S rf = Loadbearing 90mm AustraLite is calculated using the deemed-to-satisfy provisions of Clause Insulation FRL: AustraLite masonry requires material thicknesses of: 70mm to achieve 60 & 90-minute FRLs 80mm to achieve a 120-minute FRL 102mm to achieve a 180-minute FRL and 120mm to achieve a 240-minute FRL All AustraLite masonry units have a material thickness greater than 80mm, which gives them a minimum 120-minute Insulation FRL, calculated as per AS3700:2011, Clause 6.5.4(b) (ii). The highest FRL requirement is 240-minutes. Austral achieves this by reducing the core size of and blocks to give them a material thickness greater than 120mm as per AS3700, Clause To distinguish these from the 120-minute rated blocks, their code numbers are and The Insulation FRL for each block is shown in the following bar chart. INSULATION FRL (minutes) Code Nos ; 10-31; 15-01; 20-01; & ; & when core-filled ; ; & & ; 20-48; 20-91; & when core filled Austral Masonry NSW Page 2

3 How to use the Structural Adequacy charts: The first set of graphs (pages 4 to 9) is for masonry. The 2 nd set (pages 10 to 14) is for Loadbearing masonry. Page 15 is for partially reinforced masonry which increases the maximum Srf to 36. Find the appropriate page with the required FRL: 60, 90, 120, 180 or 240 minutes. Next, find the graph with the same restraint conditions as your proposed wall. Finally, plot the intersection of your wall s height and length on the appropriate graph. The thickness required is represented by those lines clear of the intersection point. Note: All masonry must be designed for Robustness (AS3700, Part 4.6). In some cases, the Robustness requirement overrides the FRL limits. Where this occurs, the pale Robustness graph-line changes to the darker colour of the FRL line. Some walls, particularly those without ends restrained, are governed by other loads (e.g. Vertical, Bending, Robustness, Earthquake etc.) Please check this and any other loads with your engineer. Austral Masonry NSW Page 3

4 60 & 90-Minute Structural Adequacy FRLs (S rf = 27.8) Austral Masonry NSW Page 4

5 120-Minute Structural Adequacy FRLs (S rf = 26.32) Austral Masonry NSW Page 5

6 180-Minute Structural Adequacy FRLs (S rf = 23.3) Austral Masonry NSW Page 6

7 240-Minute Structural Adequacy FRLs (S rf = 21.16) Austral Masonry NSW Page 7

8 For wider spans, see PARTIALLY REINFORCED MASONRY on page to 90-Minutes 120-Minute 180-Minute 240-Minute Austral Masonry NSW Page 8

9 60 to 90-Minutes 120-Minute 180-Minute 240-Minute Austral Masonry NSW Page 9

10 60-Minute Structural Adequacy FRL (S rf = 22.93) Austral Masonry NSW Page 10

11 90-Minute Structural Adequacy FRL (S rf = 21.31) Austral Masonry NSW Page 11

12 120-Minute Structural Adequacy FRL (S rf = 20.16) Austral Masonry NSW Page 12

13 180-Minute Structural Adequacy FRL (S rf = 18.54) Austral Masonry NSW Page 13

14 240-Minute Structural Adequacy FRL (S rf = 17.39) Austral Masonry NSW Page 14

15 Partially Reinforced Masonry: Structural Adequacy FRL = 240 minutes Srf < 36 (AS3700:2011, Table 6.1) Robustness = 0.5kPa (from CMAA Design Guide, Horizontal Loads) WALL HEIGHT reinforced core spacing one 16mm reinforcement bar t = 140mm t = 190mm 3.0m 7.6m n.a. 4.0m 4.4m 6.4m 5.0m 2.8m 4.0m 6.0m 2.0m 2.8m 7.0m Srf > m 8.0m - 1.4m WALL bond beam spacing LENGTH one 16mm reinforcement bar t = 140mm t = 190mm 3.0m 4.4m 5.8m 4.0m 3.8m 5.0m 5.0m 3.4m 4.4m 6.0m Srf > m 7.0m - Srf > m - - Disclaimer: Please note: It is the designer s responsibility to allow for the effects of control joints; chases; openings; the strength and stiffness of connectors & supports, in addition to consideration of loads and masonry properties. Austral Masonry NSW Page 15