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Specification List

Technical Reference About Our Steel Grating Products:
Quick Tips for your purchasing help:
I. Bearing Bar (Load Bar) can be two types: plain flat type and serrated type. So, please mention the bar type with your inquiry. Common bar size range (mm): 20 x 3 to 100 x 9.
II. Bearing Bar Pitch / Spacing (center to center): 12.5 to 100 mm normally. 30, 40, 60mm are recommended. American standard size is available
III. Cross Bar Pitch/Spacing (center to center): from18.5 to 101.6mm or custom size. 50, 100mm are recommended. American standard size is available.
IV. Spacing Types: We offer two spacing types: square or each pitch size, or rectangular spacing.
V. Steel Material: Q235 Steel or stainless steel grating.
VI. Surface Treatment: Three types available. Please advise if you need the finishing types of the Mild Steel grating: Untreated/ mill black, coated or Hot Dipped Galvanized. Also please note we offer two types of hot dipped zinc plating according to different standards: China standard: YB/T 13912-2002 or American Standard: ASTM A123.
VII. Please mention the application for the order grating products, whether it is used for platform structures, industrial flooring decks or stair treads, drainage covers or other uses. We supply steel gratings with a variety of loading capacities (light type or heavy loading) and can help choosing the right grating materials and design styles that may determine the loading of the finished grating panels ( whether the grating is open bar or dense mesh type ) accordingly.

Main standard grating products we offer with specifications for reference.

Our customers can also choose from our detail specification lists for our Steel Bar Grating Standard Products, as below, with Vertical Bar Spacing, Horizontal Bar Spacing and Supporting Steel Bar Sizes.

Specification of Common Standard Steel Bar Grating
Series No Vertical
Bar
Spacing		 Horizontal
Bar
Spacing		 Specification of Supporting Flat Steel
Width X Thickness
(mm) (mm)
20× 3 25× 3 32× 3 40× 3 20× 5 25× 5
1 30 100 G203/ 30/ 100 G253/ 30/ 100 G323/ 30/ 100 G403/ 30/ 100 G205/ 30/ 100 G255/ 30/ 100
50 G203/ 30/ 50 G253/ 30/ 50 G323/ 30/ 50 G403/ 30/ 50 G205/ 30/ 50 G255/ 30/ 50
2 40 100 G203/ 40/ 100 G253/ 40/ 100 G323/ 40/ 100 G403/ 40/ 100 G205/ 40/ 100 G255/ 40/ 100
50 G203/ 40/ 50 G253/ 40/ 50 G323/ 40/ 50 G403/ 40/ 50 G205/ 40/ 50 G255/ 40/ 50
3 60 50 - G253/ 60/ 50 G323/ 60/ 50 G403/ 60/ 50 G205/ 60/ 50 G255/ 60/ 50
  32 × 5 40× 5 45× 5 50× 5 55× 5 60× 5
4 30 100 G325/ 30/ 100 G405/ 30/ 100 G455/ 30/ 100 G500 / 30 / 100 G555/ 30/ 100 G605/ 30/ 100
50 G325/ 30/ 50 G405/ 30/ 50 G455/ 30/ 50 G500/ 30/ 50 G555/ 30/ 50 G605/ 30/ 50
5 40 100 G325/ 40/ 100 G405/ 40/ 100 G455/ 40/ 100 G500/ 40/ 100 G555/ 40/ 100 G605/ 40/ 100
50 G325/ 40/ 50 G405/ 40/ 50 G455/ 40/ 50 G500/ 40/ 50 G555/ 40/ 50 G605/ 40/ 50
6 60 50 G325/ 60/ 50 G405/ 60/ 50 G455/ 60/ 50 G500/ 60/ 50 G555/ 60/ 50 G605/ 60/ 50

 

FOR SIDEWALK LOADING


A		 Type Grating Frame Load Bar Pitdn
Width B C D E Angle
200 TGD-A200-25 1002 300 25 315 30 L30X30X3 20
250 TGD-A250-25 1002 350 25 365 30 L30X30X3 20
300 TGD-A300-25 1002 400 25 415 30 L30X30X3 20
350 TGD-A350-25 1002 450 25 465 30 L30X30X3 20
400 TGD-A400-25 1002 500 25 515 30 L30X30X3 20
450 TGD-A400-25 1002 550 25 565 30 L30X30X3 20

 
200 TGD-B200-25 992 300 25 315 30 L30X30X3 15
250 TGD-B250-25 992 350 25 365 30 L30X30X3 15
300 TGD-B300-25 992 400 25 415 30 L30X30X3 15
350 TGD-B350-25 992 450 25 465 30 L30X30X3 15
400 TGD-B400-25 992 500 25 515 30 L30X30X3 15
450 TGD-B450-25 992 550 25 565 30 L30X30X3 15

TG Type Grating:
TRENCH COVERS & SUMP COVERS is used in municipal engineering, walkway, park, water & sewage treatment system etc. The entire range has been designed with a view to maximizing the grate open area thus achieving the most hydraulically efficent grates available, it can be manufacture the widest range of sizes for various load requirements.

Class A Type Grating Frame
Width B C D E Angle
200 TG200-20 995 300 20 320 25 L50X25X5
250 TG250-20 995 350 20 370 25 L50X25X5
300 TG300-25 995 400 25 420 30 L50X30X5
350 TG350-25 995 450 25 470 30 L50X30X5
400 TG400-25 995 500 25 520 30 L50X30X5
450 TG450-25 995 550 25 570 30 L50X30X5
500 TG500-25 995 600 25 620 30 L50X30X5
550 TG550-25 995 650 25 670 30 L50X30X5
200 LHTG200-25 995 300 25 320 30 L50X30X5
250 LHTG250-25 995 350 25 370 30 L50X30X5
300 LHTG300-32 995 400 32 420 37 L50X37X5
350 LHTG350-32 995 450 32 470 37 L50X30X5
400 LHTG400-40 995 500 40 520 45 L50X45X5
450 LHTG450-40 995 550 40 570 45 L50X45X5
500 LHTG500-45 995 600 45 620 50 L50X50X5
550 LHTG550-45 995 650 45 670 50 L50X50X5
200 HTG200-32 995 300 32 320 37 L50X37X5
250 HTG250-40 995 350 40 370 45 L50X45X5
300 HTG300-45 995 400 45 420 50 L50X50X5
350 HTG350-45 995 450 45 470 50 L50X50X5
400 HTG400-50 995 510 50 530 55 L55X55X5
450 HTG450-50 995 560 50 580 55 L55X55X5
500 HTG500-60 995 630 60 650 65 L65X65X5
550 HTG550-60 995 680 60 700 65 L65X65X5
200 HHTG200-40 995 300 40 320 45 L50X45X5
250 HHTG250-45 995 350 45 370 50 L50X50X5
300 HHTG300-50 995 410 50 430 55 L55X55X5
350 HHTG350-50 995 460 50 480 55 L55X55X5
400 HHTG400-60 995 530 60 550 65 L65X65X5
450 HHTG450-65 995 590 65 610 70 L70X70X5
500 HHTG500-65 995 640 65 660 70 L70X70X5
550 HHTG550-75 995 710 75 730 80 L80X80X5


★ The design loads of the moving vehicles such as heavy truck, tram-car, and pedestrian sidewalk are listed as below for reference.
Class Total Load Load of Rear Wheel Impact Load of Rear Whee Contract Length of Rear Wheel Width of Rear Wheel Cars Concerned
1st Class Bridge 20T 8,000 (kg) 11,200 (kg) 20 (cm) 50 (cm) Cement tanker Dump Truck
2nd Class Bridge 14T 5,600 (kg) 7,840 (kg) 20 (cm) 50 (cm) Bus
Degree of Light Truck 6T 2,400 (kg) 3,360 (kg) 20 (cm) 24 (cm) Fork Lift Truck
Degree of Car 2T 800 (kg) 1,120 (kg) 20 (cm) 16 (cm) Car
Sidewalk Distributed Load 500kg/m2

 

TU Type Bar Grating:

FOR SIDEWALK LOADING

A
Type Grating Frame Load Bar Pitdn
Width B C D Angle 30
150 TU150-20 995 130 20 210 L40X40X4 30
200 TU200-25 995 180 25 280 L50X50X5 30
250 TU250-25 995 230 25 330 L50X50X5 30
300 TU300-25 995 280 25 380 L50X50X5 30
350 TU350-32 995 330 32 430 L50X50X5 30
400 TU400-32 995 380 32 480 L50X50X5 30

Aluminum Grating

ALUMINUM GRATING LOAD TABLE
  (LOAD BARS AT 30mm PITCH)


Type		 Load Bar Size
mm		 　 Span in mm
450 600 750 900 1050 1200 1500 1800 2100 2400 2700 3000
705 / 30 / 100 70 × 5 U 533.5 299.2 191.4 133.1 97.8 62.59 32.66 16.59 10.24 6.45 4.24 3.05
705 / 30 / 50 D 0.86 1.53 2.39 3.44 4.68 5.13 6.52 7 8 8.57 9.1 10
655 / 30 / 100 65 × 5 U 485 272 174 121 88.90 68 28.12 15.38 9.3 5.84 3.73 　
655 / 30 / 50 D 0.97 1.73 2.71 3.90 5.31 6.94 7 8 9 9.70 10 　
605 / 30 / 100 60 × 5 U 380 210 130 90 60 53 22.11 12.09 7.31 4.59 2.93 　
605 / 30 / 50 D 0.96 1.70 2.58 3.69 4.56 6.88 7 8 9 9.70 10 　
555 / 30 / 100 55 × 5 U 331 186 119 82.60 60.60 40.37 16.92 9.28 5.66 3.62 　 　
555 / 30 / 50 D 1.09 1.95 3.05 4.39 5.98 6.82 7 8 9.09 10 　 　
505 / 30 / 100 50 × 5 U 281 158 101 70.1 43.80 30.40 12.73 6.95 4.2 2.73 　 　
505 / 30 / 50 D 1.24 2.21 3.45 4.97 5.77 6.84 7 8 9 10 　 　
455 / 30 / 100 45 × 5 U 237 133 85.20 59.1 37.85 22.71 10.61 5.71 3.38 　   　
455 / 30 / 50 D 1.43 2.55 3.99 5.75 6.83 7 8 9 10 　   　
405 / 30 / 100 40 × 5 U 198 111 71.2 42.17 24.53 16.60 7.07 4.15 2.39 　   　
405 / 30 / 50 D 1.71 3.04 4.75 5.84 6.31 7 8 9.30 10 　   　
305 / 30 / 100 30 × 5 U 91.46 51.74 33.04 19.86 11.53 7.77 3.84 1.86 　   　
305 / 30 / 50 D 1.88 3.35 5.24 6.55 7 8 9.80 10 　   　
255 / 30 / 100 25 × 5 U 58.7 31.02 18.42 10.53 6.62 4.91 2.25 　   　
255 / 30 / 50 D 2.08 3.47 5.05 6 7 8.9 10 　        
 

Bar Grating

Other Grating:

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