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)
 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. A Beams
Condition No. B Beams at 295c/c  2.53 5.350 5.150 4.950 4.775 4.450 4.225 Condition No. B Beams at 295c/c
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. C Beams at 520 & 295c/c*  (equiv. to 408c/c
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. D Double Beams at 648c/c (equiv. to 324c/c)
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. E Double Beams at 422c/c (equiv. to 211c/c)
Condition No. F Beams
 at 127c/c		 3.60 5.900 5.900 5.900 5.900 5.900 5.900 Condition No. F Beams

 

            
 Load / Span Charts for 155mm deep beams at varying centres
            
With 100mm thick blocks (max density = 650 kg/m3)
            
 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. A Beams at 520c/c
Condition No. B Beams at 295c/c 1.64 5.825 5.575 5.325 5.100 4.725 4.425 Condition No. B Beams at 295c/c
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. C Beams at 520 & 295c/c*  (equiv. to 408c/c)
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. D Double Beams at 648c/c (equiv. to 324c/c)
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. E Double Beams at 422c/c (equiv. to 211c/c)
Condition No. F Beams  at 127c/c 3.60 5.900 5.900 5.900 5.900 5.900 5.900 Condition No. F Beams  at 127c/c
 Load / Span Charts for 225mm deep beams at varying centres
With 100mm thick blocks (max density = 1900 kg/m3)
 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. 1 Beams at 540crs
Condition No. 2 Beams at 315c/c 3.37 7.450 7.275 7.125 6.950 6.525 6.200 Condition No. 2 Beams at 315c/c
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. 3 Beams at 540 & 315c/c*  (equiv. to 428c/c)
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. 4 Double Beams at 692c/c (equiv. to 346c/c)
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. 5 Double Beams at 468c/c (equiv. to 234c/c)
Condition No. 6 Beams  at 152c/c 5.16 7.900 7.900 7.900 7.900 7.900 7.700 Condition No. 6 Beams  at 152c/c
 Load / Span Charts for 225mm deep beams at varying centres
With 100mm thick blocks (max density = 650 kg/m3)
 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. 1 Beams at 540crs
Condition No. 2 Beams at 315c/c 2.54 7.800 7.575 7.400 7.225 6.875 6.475 Condition No. 2 Beams at 315c/c
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. 3 Beams at 540 & 315c/c*  (equiv. to 428c/c)
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. 4 Double Beams at 692c/c (equiv. to 346c/c)
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. 5 Double Beams at 468c/c (equiv. to 234c/c)
Condition No. 6 Beams  at 152c/c 5.16 7.900 7.900 7.900 7.900 7.900 7.700 Condition No. 6 Beams  at 152c/c