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Treadware Moulded Grating

Load Deflection Tables

Deflections:

One of the major benefits of GRP grating is product deflection when loads are imposed and returning to normal when the load has been removed. This is of course important when compared to steel grating that will deform and not return to its original shape. This guide is to help with calculating acceptable deflection rates for pedestrian traffic where the deflection of a floor panel under the design load shall not exceed 10mm or 1/200th of the span, whichever is the lesser. The difference in level between a loaded and an adjacent unloaded flooring shall not exceed 4mm.

Deflections rates taken from BS4592-0:2006.

Concentrated Line Load Table - Deflection in (mm)

Concentrated Line Load Table

SPAN
(mm)		 STYLE LOAD IN KGS/M OF WIDTH Break
Point
  75 149 298 447 596 745  
305 FG03
(25mm thick x 38SM)		              
FG04
(38mm thick x 38SM)		 0.279 0.356 0.483 0.61 0.762 0.889 17116
FG05
(50mm thick x 50SM)		 0.279 0.305 0.406 0.483 0.635 1.041 21727
FG01
(25mm thick x 200RMS) 5x1		 0.33 0.483 0.737 0.991 1.27 1.52 9442
FG02
(25mm thick x 25x100RMH) 		 0.381 0.483 0.711 0.94 1.168 1.372 9488
FG11
(38mm thick x19TGSM)		 0.33 0.686 1.346 2.057 2.692    
FG09
(38mm thick x20TGSM)		              
FG12
(30mm thick x38x152RM)		 0.051 0.102 0.229 0.381   0.635
457 FG03
(25mm thick x 38SM)		              
FG04
(38mm thick x 38SM)		 0.279 0.356 0.483 0.61 0.762 0.889 17116
FG05
(50mm thick x 50SM)		 0.279 0.305 0.406 0.483 0.635 1.041 21727
FG01
(25mm thick x 200RMS) 5x1		 0.33 0.483 0.737 0.991 1.27 1.52 9442
FG02
(25mm thick x 25x100RMH) 		 0.381 0.483 0.711 0.94 1.168 1.372 9488
FG11
(38mm thick x19TGSM)		 0.33 0.686 1.346 2.057 2.692    
FG09
(38mm thick x20TGSM)		              
FG12
(30mm thick x38x152RM)		 0.051 0.102 0.229 0.381   0.635
610 FG03
(25mm thick x 38SM)		 0.864 1.702 3.505 5.156 6.706 8.179 2924
FG04
(38mm thick x 38SM)		 0.356 0.66 1.245 1.85 2.464 3.073 8718
FG05
(50mm thick x 50SM)		 0.356 0.508 0.813 1.128 1.753 3.327 11713
FG01
(25mm thick x 25x100RMS) 		 0.864 1.727 3.454 5.182 6.909 8.636 4305
FG02
(25mm thick x 25x100RMH) 		 0.813 1.499 2.819 4.166 5.512 6.833 4643
FG11
(38mm thick x19TGSM)		 0.864 1.702 3.404 5.105 6.807    
FG09
(38mm thick x20TGSM)		   1.092 2.184 3.277 4.369 5.461  
FG12
(30mm thick x38x152RM)		 0.381 0.813 1.651 2.388   3.861  
762 FG03
(25mm thick x 38SM)		              
FG04
(38mm thick x 38SM)		              
FG05
(50mm thick x 50SM)		              
FG01
(25mm thick x 25x100RMS) 		 1.397 2.718 5.105 7.163 9.55 11.938 3589
FG02
(25mm thick x 25x100RMH) 		 1.041 2.108 4.267 6.401 8.534 10.668 4035
FG11
(38mm thick x19TGSM)		 1.068 2.134 4.267 6.401 8.534    
FG09
(38mm thick x20TGSM)		              
FG12
(30mm thick x38x152RM)		 0.66 1.346 2.692 4.013   6.691  
914 FG03
(25mm thick x 38SM)		 2.896 5.918 12.116 18.44     1948
FG04
(38mm thick x 38SM)		 0.864 1.803 3.683 5.563 7.417 9.296 5817
FG05
(50mm thick x 50SM)		 0.508 1.118 2.235 3.2 5.156 10.058 7780
FG01
(25mm thick x 25x100RMS) 		 2.413 4.724 8.814 12.369 16.51 20.625 3216
FG02
(25mm thick x 25x100RMH) 		 1.27 2.743 5.689 8.636 11.557 14.503 3362
FG11
(38mm thick x19TGSM)		 1.422 2.845 2.108 5.689 8.534    
FG09
(38mm thick x20TGSM)		   3.023 6.248 9.627 12.903 15.977  
FG12
(30mm thick x38x152RM)		 1.067 2.108 4.166 6.401   10.719  
1067 FG03
(25mm thick x 38SM)		 4.597 9.398 19.253       1617
FG04
(38mm thick x 38SM)		 1.397 2.87 5.842 8.814 11.786 14.757 4291
FG05
(50mm thick x 50SM)		 0.584 1.295 2.718 4.14 6.985 14.122 6636
FG01
(25mm thick x 25x100RMS) 		              
FG02
(25mm thick x 25x100RMH) 		              
FG11
(38mm thick x19TGSM)		 1.88 3.759 7.518 11.278      
FG09
(38mm thick x20TGSM)		   5.105 10.287 15.443 20.599    
FG12
(30mm thick x38x152RM)		 1.473 2.997 6.071 9.093      
1219 FG03
(25mm thick x 38SM)		 5.715 11.633         1461
FG04
(38mm thick x 38SM)		 2.261 4.749 9.677 14.63 19.583   3755
FG05
(50mm thick x 50SM)		 0.914 1.93 3.937 5.918 9.957   5834
FG01
(25mm thick x 25x100RMS) 		              
FG02
(25mm thick x 25x100RMH) 		              
FG11
(38mm thick x19TGSM)		 2.515 5.029 10.058 15.087      
FG09
(38mm thick x20TGSM)		   7.772 15.646 23.47      
FG12
(30mm thick x38x152RM)		 2.337 4.699 9.449 13.767    
1524 25mm thick x 38SM)              
FG04
(38mm thick x 38SM)		 4.166 8.66 17.678       3004
FG05
(50mm thick x 50SM)		              
FG01
(25mm thick x 25x100RMS) 		              
FG02
(25mm thick x 25x100RMH) 		              
FG11
(38mm thick x19TGSM)		              
FG09
(38mm thick x20TGSM)		              
FG12
(30mm thick x38x152RM)		              
1, RM=Rectangular Mesh 
2, TGSM= TwinGrid Square Mesh
3, SM= Square Mesh 
4, RMS= Rectangular Mesh Standard 
5, RMH= Rectangular Mesh Heavy duty 
Note: above figures should be used as a guide only, and assumes grating is securely fixed in place.


Uniform Load Table - Deflection in (mm)

Treadware

SPAN (mm) STYLE  LOAD IN KGS/Square Meter
  244 489 977 1466 1955 2444 3665 4887
305 FG03
(25mm thick x 38SM)		                
FG04
(38mm thick x 38SM)		 0.254 0.305 0.381 0.457 0.559 0.635 0.838  
FG05
(50mm thick x 50SM)		 0.254 0.279 0.33 0.381 0.432 0.483 0.737  
FG01
(25mm x 25x100RMS) 		 0.279 0.381 0.533 0.711 0.864 1.041   1.905
FG02
(25mm x 25x100RMH) 		 0.33 0.406 0.533 0.686 0.813 0.965   1.651
FG11
(38mm thick x19TGSM)		 0.432 0.838 1.676 2.515 3.353     8.458
FG09
(38mm thick x20TGSM)		                
FG12
(30mm thick x38x152RM)		 0.0762 0.152 0.33 0.483   0.787   1.549
457 FG03
(25mm thick x 38SM)		 0.66 1.092 1.93 2.769 3.607 4.47 6.579  
FG04
(38mm thick x 38SM)		                
FG05
(50mm thick x 50SM)		                
FG01
(25mm x 25x100RMS) 		                
FG02
(25mm x 25x100RMH) 		                
FG11
(38mm thick x19TGSM)		 0.686 1.372 2.769 4.14 5.537      
FG09
(38mm thick x20TGSM)		   0.381 0.737          
FG12
(30mm thick x38x152RM)		 0.229 0.483 0.965 1.448   2.413   4.851
610 FG03
(25mm thick x 38SM)		 1.118 2.108 4.14 6.172 8.179 10.211 15.265  
FG04
(38mm thick x 38SM)		 0.432 0.813 1.549 2.311 3.073 3.8354 5.74  
FG05
(50mm thick x 50SM)		 0.381 0.584 0.965 1.372 1.753 2.134 4.115  
FG01
(25mm thick x 25x100RMS) 		 0.914 1.854 3.683 5.537 7.391 9.22   18.466
FG02
(25mm x 25x100RMH) 		 0.991 1.829 3.505 5.156 6.833 9.017   16.857
FG11
(38mm thick x19TGSM)		 1.067 2.134 4.242 6.375 8.484      
FG09
(38mm thick x20TGSM)		   1.346 2.515          
FG12
(30mm thick x38x152RM)		 0.483 0.965 1.905 2.87   4.775   9.449
762 FG03
(25mm thick x 38SM)		 2.667 5.387 10.82 16.281 21.717      
FG04
(38mm thick x 38SM)		                
FG05
(50mm thick x 50SM)		                
FG01
(25mm x 25x100RMS) 		                
FG02
(25mm x 25x100RMH) 		                
FG11
(38mm thick x19TGSM)		 1.676 3.353 6.706 10.058 13.411      
FG09
(38mm thick x20TGSM)		                
FG12
(30mm thick x38x152RM)		 0.991 1.981 3.962 5.944   9.855    
914 FG03
(25mm thick x 38SM)		 5.537 11.176 21.717          
FG04
(38mm thick x 38SM)		 1.702 3.454 6.959 10.465 13.97 17.475    
FG05
(50mm thick x 50SM)		 1.194 2.108 3.937 5.766 7.595 9.449 18.593  
FG01
(25mm x 25x100RMS) 		 3.632 6.6 12.573 18.542 24.486      
FG02
(25mm x 25x100RMH) 		 2.565 5.309 10.82 16.332 21.869      
FG11
(38mm thick x19TGSM)		 2.667 5.359 10.693 16.027        
FG09
(38mm thick x20TGSM)		   5.588 10.668          
FG12
(30mm thick x38x152RM)		 1.803 3.632 7.239 10.871        
1067 FG03
(25mm thick x 38SM)		 10.287 20.752            
FG04
(38mm thick x 38SM)		 3.149 6.401 12.903 19.406        
FG05
(50mm thick x 50SM)		 1.448 2.997 6.096 9.22 12.344 15.443    
FG01
(25mm x 25x100RMS) 		 8.077 14.884            
FG02
(25mm x 25x100RMH) 		 4.801 9.91 20.117          
FG11
(38mm thick x19TGSM)		 4.089 8.179 16.358          
FG09
(38mm thick x20TGSM)		   10.643 21.057          
FG12
(30mm thick x38x152RM)		 6.604 6.401 12.827          
1219 FG03
(25mm thick x 38SM)		                
FG04
(38mm thick x 38SM)		 5.969 12.167 24.511          
FG05
(50mm thick x 50SM)		 2.413 4.928 9.957 14.961 19.989      
FG01
(25mm x 25x100RMS) 		                
FG02
(25mm x 25x100RMH) 		                
FG11
(38mm thick x19TGSM)		 6.274 12.548            
FG09
(38mm thick x20TGSM)		   17.78            
FG12
(30mm thick x38x152RM)		 5.283 10.439            
1524 FG03
(25mm thick x 38SM)		                
FG04
(38mm thick x 38SM)		                
FG05
(50mm thick x 50SM)		 5.944 12.065 24.333          
FG01
(25mm x 25x100RMS) 		                
FG02
(25mm x 25x100RMH) 		                
FG11
(38mm thick x19TGSM)		                
FG09
(38mm thick x20TGSM)		                
FG12
(30mm thick x38x152RM)		                
1, RM=Rectangular Mesh
2, TGSM= TwinGrid Square Mesh
3, SM= Square Mesh
4, RMS= Rectangular Mesh Standard
5, RMH= Rectangular Mesh Heavy duty
Note: above figures should be used as a guide only, and assumes grating is securely fixed in place.


CONCENTRATED FULL PANEL LOAD-1220x3660 Deflection in (mm)

Treadware

SPAN (mm)  STYLE  KGS             
  149 372 745 1117 1490 2234 2979
457 FG03 (25mm thick x 38SM) 0.254 0.686 1.55 2.159 2.667 4.166 5.232
FG04 (38mm thick x 38SM) 0.203 0.406 0.711 0.889 1.143 1.676 2.21
FG05 (50mm thick x 50SM)         0.711 1.016 1.346
FG22(25mm thick x 25x100RM) 0.279 0.686 1.448 2.209 2.718 4.191 5.41
610 FG03 (25mm thick x 38SM) 0.734 1.651 3.175 4.623 6.121 9.119 12.116
FG04 (38mm thick x 38SM) 0.356 0.889 1.499 1.905 2.413 3.531 4.267
FG05 (50mm thick x 50SM)         1.524 2.032 2.54
FG22(25mm thick x 25x100RM) 0.711 1.524 3.531 4.623 6.02 9.22 12.294
914 FG03 (25mm thick x 38SM) 1.778 4.445 8.814 13.157      
FG04 (38mm thick x 38SM) 0.61 1.5 2.9 4.14 5.41 7.95 10.566
FG05 (50mm thick x 50SM)         2.896 4.191 5.512
FG22(25mm thick x 25x100RM) 1.626 3.962 7.823 11.811      
1219 FG03 (25mm thick x 38SM) 2.946 7.544 15.062        
FG04 (38mm thick x 38SM) 0.914 2.388 4.699 6.96 9.195 13.665  
FG05 (50mm thick x 50SM)         4.547 6.807 9.271
FG22(25mm thick x 25x100RM)              
1, RM=Rectangular Mesh
2, SM= Square Mesh
Note: above figures should be used as a guide only, and assumes grating is securely fixed in place.


 

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