Product Range > Gratings / Stair Treads
   
Steel Floor Gratings, Stair Treads and Clamps

Floor Gratings and Stair Treads by Neha Industries ensures easy and safe working, walking and wheeling surface. Bearing bars and cross bars are welded into one piece Grating with top of all bars being flush in one plane. Uniformity of material and design ensures trouble free services throughout the life of the Gratings. Factory tested and inspected Gratings gives the user full value for money.

Gratings by Neha Industries are precise, graceful and symmetrical. They are available in many classic patterns, all of which are designed for strength, uniform wear and attractive appearance. Gratings are available in rectangular and zig-zag pattern, with member size and center distances (pitch) as per loading conditions.

Gratings are mostly custom made as per the customers requirement and drawings. For the most techno-economical selection, specify  NEHA INDUSTRIES for all  your Gratings requirement. NEHA INDUSTRIES products are sold on the basis of guaranteed satisfaction to our valued customers.
 
FINISH
Gratings are available in various finish as under:
  SELF COLOURED
For quicker deliveries to customers, Gratings can be delivered without any coating. Gratings can then be primed and painted at site.
  RED OXIDE 
Gratings can be primed with red oxide for protection during transit and storage at site, before installation.
  PAINTED
Gratings can be primed and finish painted as per customer's requirement and specifications.
  HOT DIP GALVANIZED   
Gratings can be Hot Dip Galvanized as per Indian Standards (ISI), for protection from corrosion in damp environment.
While ordering Gratings kindly specify following details:
Material of construction
UDL and point load expected
Size of bars with center spacing
Size of Gratings with span direction
Type of Packing required
Serrated or non-Serrated top surface
Finish required
Clamping system
Type of nosing in case of stair Treads

Nomenclature : Standard Types Of Steelgard Gratings
Table A - Load table for Mild steel Grating type RP-40 & XRP-40
This table gives maximum permissible load based on limiting deflection = effective span % 300
BEARING
BAR SIZE
(mm)
SPAN
(mm)
400 600 800 1000 1100 1250 1500 1750 2000 2250 2500
LIMITING
DEFLECTION
(mm)
1.4 2.0 2.7 3.4 3.7 42 5.0 5.9 6.7 7.5 8.4
25 x 3 UDL 3492 1478 841 542 443 343          
CI 2182 923 525 338 276 214        
25 x 5 UD L 5820 2463 1403 904 739 572 394        
CI 3637 1539 876 565 461 357 246      
30 x 3 UDL 6035 2554 1454 938 766 593 408        
CL 3771 1596 908 586 478 370 255      
30 x 5 UDL 10058 4257 2424 1563 1278 988 681 506      
CI 6286 2660 1515 976 798 617 425 316    
35 x 3 UDL 9576 4053 2308 1488 1216 941 648 481      
CL 5985 2538 1442 930 760 588 405 300    
35 x 5 UDL 15969 6759 3849 2482 2029 1569 1081 803 611 480  
CL 9980 4224 2405 1551 1268 980 675 501 381 300
40 x 3 UDL 14306 6055 3448 2223 1818 1406 968 719 547 430  
CL 8941 3784 2155 1389 1136 878 605 449 341 268
40 x 5 UDL 23846 10093 5748 3706 3030 2344 1614 1200 912 717 586
CL 14903 6308 3592 2316 1893 1465 1008 750 570 448 366
50 x 5 UDL 46566 19710 11225 7237 5917 4577 3153 2343 1782 1401 1144
CI 29103 12318 7015 4523 3598 2860 1970 1464 1113 875 715
Note : Spans to left of heavy line in table A & B produce a deflection of 6 mm or less under a uniform distributed load of 500
kg/sq.m.
NOMENCLATURE :
UDL-Uniformly distributed load in kg/sq.m.
CL-Concentrated load acting at mid span in kgs.
STRUCTURAL DESIGN ASSUMPTIONS :
Load calculations are based on permissible bending stress of 1650 kg/sq. cm.
Grating panels are assumed to be simply supported.
 
Table B - Load table for Mild steel Grating type RP-40 & XRP-40
This table gives maximum permissible load based on limiting deflection = effective span % 300
BEARING
BAR SIZE
(mm)
SPAN
(mm)
400 600 800 1000 1100 1250 1500 1750 2000 2250 2500
LIMITING
DEFLECTION
(mm)
2.0 3.0 4.0 5.0 5.5 6.25 7.5 8.8 10.0 11.3 12.5
25x3
UDL 4988 2217 124 797 65 510 354        
CI 3117 1385 778 498 411 318 221        
25 x 5
UDL 8314 3694 2078 1329 1098 851 591        
CI 5196 O8 1298 O   531 369        
30 x 3
UDL 8621 3831 21 1379 1138 2 612        
CI 5388 2394 16  1 711 551 382        
30 x 5
UDL 14368 6385 3591 2298 1899 1470 1021` 754      
CI 8980 3990 2244 1436 1186 918 6 471      
35 x 3
UDL 13680 6079 3419 2188 1807 1400 972 717      
CI 8550 3799 2136 1367 1129 875 607        
35 x 5
UDL 22812 10138 5702 3650 3016 2334 1621 1197 911 723  
CL 14257 6336 3563 1 1885 14 1013 7 569 451  
40 x 3
UDL 20437 9082 510 3269 2702 2092 1452 1072 816 7  
CI 12 5676 3192 2 1 1307 907 670 510 4  
40 x 5
UDL 34065 15139 8515 50 45   21 1789 1361 1080 872
CI 21290 9461 5321 3406 815 2180 1513 1118 850 675 5
50 x 5
UDL 66522 29565 16629 10642 8795 6811 4729 94 2659 2110 1702
CI 41576 18478 10393 6651 5496 4256 2955 21 1661 1318 1063
                         
Home | About Us | Product Range | Quality Control | Contact Us
Copyright © 2012 Neha Industries