|
Without Bottom Reinforcement
|
Imposed
Load |
Slab
Depth |
Span (m) for fire rating period and
reinforcing mesh as indicated below |
|
|
1.0 Hours |
1.5 Hours |
2.0 Hours |
|
|
kN/m˛ |
mm |
A6 |
A7 |
A8 |
A6 |
A7 |
A8 |
A6 |
A7 |
A8 |
|
|
2.5 |
100 |
4.30 |
4.77 |
5.23 |
3.93 |
4.34 |
4.74 |
x |
x |
x |
|
|
2.5 |
110 |
4.33 |
4.84 |
5.35 |
4.09 |
4.57 |
5.03 |
x |
x |
x |
|
|
2.5 |
120 |
4.36 |
4.88 |
5.41 |
4.15 |
4.67 |
5.18 |
3.93 |
4.40 |
4.87 |
|
|
2.5 |
125 |
4.37 |
4.90 |
5.43 |
4.17 |
4.69 |
5.22 |
3.98 |
4.48 |
4.96 |
|
|
2.5 |
130 |
4.38 |
4.92 |
5.46 |
4.18 |
4.72 |
5.25 |
4.03 |
4.54 |
5.04 |
|
|
2.5 |
150 |
4.41 |
4.98 |
5.54 |
4.24 |
4.80 |
5.35 |
4.10 |
4.65 |
5.20 |
|
|
2.5 |
170 |
- |
5.03 |
5.61 |
- |
4.86 |
5.44 |
- |
4.73 |
5.30 |
|
|
2.5 |
200 |
- |
5.09 |
5.70 |
- |
4.94 |
5.55 |
- |
4.83 |
5.43 |
|
|
5.0 |
100 |
3.56 |
3.95 |
4.34 |
3.26 |
3.60 |
3.93 |
x |
x |
x |
|
|
5.0 |
110 |
3.62 |
4.05 |
4.47 |
3.42 |
3.82 |
4.21 |
x |
x |
x |
|
|
5.0 |
120 |
3.67 |
4.11 |
4.55 |
3.50 |
3.93 |
4.37 |
3.31 |
3.71 |
4.11 |
|
|
5.0 |
125 |
3.69 |
4.14 |
4.59 |
3.52 |
3.97 |
4.41 |
3.36 |
3.78 |
4.19 |
|
|
5.0 |
130 |
3.71 |
4.17 |
4.63 |
3.55 |
4.00 |
4.45 |
3.42 |
3.85 |
4.28 |
|
|
5.0 |
150 |
3.79 |
4.27 |
4.76 |
3.64 |
4.12 |
4.59 |
3.52 |
3.99 |
4.46 |
|
|
5.0 |
170 |
- |
4.36 |
4.87 |
- |
4.22 |
4.72 |
- |
4.11 |
4.60 |
|
|
5.0 |
200 |
- |
4.47 |
5.01 |
- |
4.34 |
4.87 |
- |
4.25 |
4.77 |
|
|
7.5 |
100 |
3.11 |
3.45 |
3.79 |
2.84 |
3.14 |
3.43 |
x |
x |
x |
|
|
7.5 |
110 |
3.18 |
3.55 |
3.92 |
3.00 |
3.35 |
3.69 |
x |
x |
x |
|
|
7.5 |
120 |
3.23 |
3.62 |
4.01 |
3.08 |
3.46 |
3.84 |
2.91 |
3.27 |
3.61 |
|
|
7.5 |
125 |
3.26 |
3.65 |
4.05 |
3.11 |
3.50 |
3.89 |
2.97 |
3.34 |
3.70 |
|
|
7.5 |
130 |
3.28 |
3.68 |
4.09 |
3.14 |
3.53 |
3.93 |
3.02 |
3.40 |
3.78 |
|
|
7.5 |
150 |
3.37 |
3.80 |
4.23 |
3.24 |
3.66 |
4.09 |
3.14 |
3.55 |
3.97 |
|
|
7.5 |
170 |
- |
3.90 |
4.36 |
- |
3.78 |
4.22 |
- |
3.68 |
4.12 |
|
|
7.5 |
200 |
- |
4.04 |
4.52 |
- |
3.92 |
4.40 |
- |
3.83 |
4.30 |
|
|
10.0 |
100 |
2.79 |
3.10 |
3.40 |
2.56 |
2.83 |
3.09 |
x |
x |
x |
|
|
10.0 |
110 |
2.86 |
3.20 |
3.53 |
2.78 |
3.02 |
3.32 |
x |
x |
x |
|
|
10.0 |
120 |
2.92 |
3.27 |
3.62 |
2.78 |
3.13 |
3.47 |
2.63 |
2.95 |
3.26 |
|
|
10.0 |
125 |
2.95 |
3.30 |
3.66 |
2.81 |
3.16 |
3.52 |
2.68 |
3.02 |
3.35 |
|
|
10.0 |
130 |
2.97 |
3.34 |
3.70 |
2.84 |
3.20 |
3.56 |
2.73 |
3.08 |
3.42 |
|
|
10.0 |
150 |
3.07 |
3.46 |
3.85 |
2.95 |
3.33 |
3.72 |
2.85 |
3.23 |
3.61 |
|
|
10.0 |
170 |
- |
3.57 |
3.98 |
- |
3.45 |
3.86 |
- |
3.36 |
3.76 |
|
|
10.0 |
200 |
- |
3.71 |
4.15 |
- |
3.60 |
4.04 |
- |
3.52 |
3.95 |
|
|
15.0 |
100 |
2.37 |
2.63 |
2.89 |
2.17 |
2.40 |
2.62 |
x |
x |
x |
|
|
15.0 |
110 |
2.44 |
2.73 |
3.01 |
2.30 |
2.57 |
2.83 |
x |
x |
x |
|
|
15.0 |
120 |
2.50 |
2.80 |
3.10 |
2.38 |
2.67 |
2.97 |
2.25 |
2.52 |
2.79 |
|
|
15.0 |
125 |
2.52 |
2.83 |
3.14 |
2.41 |
2.71 |
3.01 |
2.30 |
2.58 |
2.86 |
|
|
15.0 |
130 |
2.55 |
2.86 |
3.18 |
2.44 |
2.74 |
3.05 |
2.34 |
2.64 |
2.93 |
|
|
15.0 |
150 |
2.64 |
2.98 |
3.32 |
2.54 |
2.87 |
3.21 |
2.46 |
2.79 |
3.12 |
|
|
15.0 |
170 |
- |
3.09 |
3.45 |
- |
2.99 |
3.34 |
- |
2.91 |
3.26 |
|
|
15.0 |
200 |
- |
3.24 |
3.62 |
- |
3.14 |
3.53 |
- |
3.07 |
3.45 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Notes:
'x' indicates this slab depth is insufficient for
the stated fire resistance.
'-' indicates this mesh is insufficient for the
stated slab thickness.
Mesh top cover 25mm at supports. Allow to sag 15mm
mid span, Yield strength 485mPa.
Concrete strength minimum 25Mpa
Minimum decking thickness 0.75mm. Yield strength 550
MPa or 1.2 mm thickness. Yield strength 350 MPa.
Limits
Maximum period of fire resistance,: 2 hours.
Slabs require full continuity at support. Designer
must ensure this is provided at end spans.
Remarks
Table is verified and derived by BRANZ in accordance
to British Standards.
References are made to BRANZ report FR2507, 98/1314,
SC1073.
|