Masonry fire resistance
to AS 3700-2011(+A1) Section 6
Table of Contents
Figure
Wall properties
Block thickness, t mm Clause 3.2.1
Wall height, H mm
Wall length, L mm
Lateral support left
Lateral support right
Lateral support top
Structural adequacy
Slenderness coefficient (fire), avf Clause 6.3.2.2
Slenderness coefficient, ah Clause 6.3.2.2
Slenderness ratio, Srf Clause 6.3.2.2
Table 6.1 - Maximum slenderness ratio of wall
| Fire resistance period | 30 | 60 | 90 | 120 | 180 | 240 |
|---|---|---|---|---|---|---|
| Clay units | 25.0 | 22.5 | 21.0 | 20.0 | 18.0 | 17.0 |
| Calcium silicate units (<45% aggregate) | 20.5 | 19.0 | 18.0 | 17.5 | 16.5 | 15.5 |
| Calcium silicate units (>45% aggregate) | 25.0 | 22.5 | 21.0 | 20.0 | 18.0 | 17.0 |
| Concrete units (<45% aggregate) | 19.5 | 18.0 | 17.0 | 16.0 | 15.5 | 15.0 |
| Concrete units (>45% aggregate) | 25.0 | 22.5 | 21.0 | 20.0 | 18.0 | 17.0 |
| Reinforced masonry | 36.0 | 36.0 | 36.0 | 36.0 | 36.0 | 36.0 |
Insulation
Table 6.3 - Material thickness of wall (mm)
| Fire resistance period | 30 | 60 | 90 | 120 | 180 | 240 |
|---|---|---|---|---|---|---|
| Clay units | 60 | 90 | 110 | 130 | 160 | 180 |
| Calcium silicate | 50 | 70 | 90 | 110 | 135 | 160 |
| Concrete (Density >1800kg/m3) | 55 | 80 | 100 | 120 | 150 | 180 |
| Concrete (Density ≤1800kg/m3) | 55 | 75 | 90 | 110 | 135 | 160 |