Domestic Ground and First Floors
Find out what load span you require for domestic ground and first floors using our useful series of tables.
Load / Span Charts for 155mm deep beams at varying centres
With 100mm thick blocks (max density = 1900 kg/m3)
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1900 kg/m3 infill, 65mm screed | SIL (Superimposed loads) kN/m2 | |||||||
Floor Self Weight (kN/m2) |
1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
Condition No. A Beams at 520c/c |
2.24 | 4.150 | 3.975 | 3.800 | 3.600 | 3.100 | 2.725 | |
Condition No. B Beams at 295c/c | 2.53 | 5.350 | 5.150 | 4.950 | 4.775 | 4.450 | 4.225 | |
Condition No. C Beams at 520 & 295c/c* (equiv. to 408c/c) | 2.35 | 4.650 | 4.450 | 4.275 | 4.100 | 3.850 | 3.425 | |
Condition No. D Double Beams at 648c/c (equiv. to 324c/c) | 2.51 | 5.150 | 4.925 | 4.725 | 4.575 | 4.275 | 4.025 | |
Condition No. E Double Beams at 422c/c (equiv. to 211c/c) | 2.86 | 5.900 | 5.850 | 5.700 | 5.500 | 5.175 | 4.900 | |
Condition No. F Beams at 127c/c |
3.60 | 5.900 | 5.900 | 5.900 | 5.900 | 5.900 | 5.900 |
Load / Span Charts for 155mm deep beams at varying centres
With 100mm thick blocks (max density = 650 kg/m3)
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650 kg/m3 infill, 65mm screed | SIL (Superimposed loads) kN/m2 | |||||||
Floor Self Weight (kN/m2) | 1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
Condition No. A Beams at 520c/c | 1.21 | 4.625 | 4.375 | 4.175 | 3.975 | 3.525 | 3.050 | |
Condition No. B Beams at 295c/c | 1.64 | 5.825 | 5.575 | 5.325 | 5.100 | 4.725 | 4.425 | |
Condition No. C Beams at 520 & 295c/c* (equiv. to 408c/c) | 1.36 | 5.150 | 4.875 | 4.650 | 4.450 | 4.100 | 3.825 | |
Condition No. D Double Beams at 648c/c (equiv. to 324c/c) | 1.68 | 5.575 | 5.300 | 5.075 | 4.850 | 4.500 | 4.225 | |
Condition No. E Double Beams at 422c/c (equiv. to 211c/c) | 2.23 | 5.900 | 5.900 | 5.900 | 5.750 | 5.375 | 5.075 | |
Condition No. F Beams at 127c/c | 3.60 | 5.900 | 5.900 | 5.900 | 5.900 | 5.900 | 5.900 |
Load / Span Charts for 225mm deep beams at varying centres
With 100mm thick blocks (max density = 1900 kg/m3)
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1900 kg/m3 infill, 65mm screed | SIL (Superimposed loads) kN/m2 | |||||||
Floor Self Weight (kN/m2) | 1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
Condition No. 1 Beams at 540crs | 2.74 | 6.200 | 5.950 | 5.725 | 5.525 | 5.175 | 4.900 | |
Condition No. 2 Beams at 315c/c | 3.37 | 7.450 | 7.275 | 7.125 | 6.950 | 6.525 | 6.200 | |
Condition No. 3 Beams at 540 & 315c/c* (equiv. to 428c/c) | 2.98 | 6.825 | 6.550 | 6.325 | 6.100 | 5.750 | 5.425 | |
Condition No. 4 Double Beams at 692c/c (equiv. to 346c/c) | 3.27 | 7.300 | 7.125 | 6.950 | 6.725 | 6.325 | 5.975 | |
Condition No. 5 Double Beams at 468c/c (equiv. to 234c/c) | 3.96 | 7.900 | 7.850 | 7.700 | 7.525 | 7.275 | 7.050 | |
Condition No. 6 Beams at 152c/c | 5.16 | 7.900 | 7.900 | 7.900 | 7.900 | 7.900 | 7.700 |
Load / Span Charts for 225mm deep beams at varying centres
With 100mm thick blocks (max density = 650 kg/m3)
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650 kg/m3 infill, 65mm screed | SIL (Superimposed loads) kN/m2 | |||||||
Floor Self Weight (kN/m2) | 1.5 | 2 | 2.5 | 3 | 4 | 5 | ||
Condition No. 1 Beams at 540crs | 1.75 | 6.800 | 6.475 | 6.200 | 5.950 | 5.525 | 5.175 | |
Condition No. 2 Beams at 315c/c | 2.54 | 7.800 | 7.575 | 7.400 | 7.225 | 6.875 | 6.475 | |
Condition No. 3 Beams at 540 & 315c/c* (equiv. to 428c/c) | 2.04 | 7.300 | 7.075 | 6.800 | 6.525 | 6.075 | 5.725 | |
Condition No. 4 Double Beams at 692c/c (equiv. to 346c/c) | 2.50 | 7.625 | 7.425 | 7.225 | 7.075 | 6.625 | ||
Condition No. 5 Double Beams at 468c/c (equiv. to 234c/c) | 3.39 | 7.900 | 7.900 | 7.875 | 7.700 | 7.425 | 7.175 | |
Condition No. 6 Beams at 152c/c | 5.16 | 7.900 | 7.900 | 7.900 | 7.900 | 7.900 | 7.700 |