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


Cross Rod
Pitch
mm


Mass
kg/m2

Load Bar Size
mm

 

Span in mm

450

600

750

900

1050

1200

1500

1800

2100

2400

2700

3000

705/30/100

100

36.69

70×5

U

533.50

299.20

191.40

133.10

97.80

62.59

32.66

16.59

10.24

6.45

4.24

3.05

705/30/50

50

38.09

D

0.86

1.53

2.39

3.44

4.68

5.13

6.52

7.00

8.00

8.57

9.10

10.00

655/30/100

100

34.17

65×5

U

485.00

272.00

174.00

121.00

88.90

68.00

28.12

15.38

9.30

5.84

3.73

 

655/30/50

50

35.57

D

0.97

1.73

2.71

3.90

5.31

6.94

7.00

8.00

9.00

9.70

10.00

 

605/30/100

100

31.65

60×5

U

380.00

210.00

130.00

90.00

60.00

53.00

22.11

12.09

7.31

4.59

2.93

 

605/30/50

50

33.05

D

0.96

1.70

2.58

3.69

4.56

6.88

7.00

8.00

9.00

9.70

10.00

 

555/30/100

100

29.13

55×5

U

331.00

186.00

119.00

82.60

60.60

40.37

16.92

9.28

5.66

3.62

 

 

555/30/50

50

30.53

D

1.09

1.95

3.05

4.39

5.98

6.82

7.00

8.00

9.09

10.00

 

 

505/30/100

100

26.61

50×5

U

281.00

158.00

101.00

70.10

43.80

30.40

12.73

6.95

4.20

2.73

 

 

505/30/50

50

28.01

D

1.24

2.21

3.45

4.97

5.77

6.84

7.00

8.00

9.00

10.00

 

 

455/30/100

100

24.09

45×5

U

237.00

133.00

85.20

59.10

37.85

22.71

10.61

5.71

3.38

 

 

 

455/30/50

50

25.49

D

1.43

2.55

3.99

5.75

6.83

7.00

8.00

9.00

10.00

 

 

 

405/30/100

100

21.57

40×5

U

198.00

111.00

71.20

42.17

24.53

16.60

7.07

4.15

2.39

 

 

 

405/30/50

50

22.97

D

1.71

3.04

4.75

5.84

6.31

7.00

8.00

9.30

10.00

 

 

 

305/30/100

100

16.53

30×5

U

91.46

51.74

33.04

19.86

11.53

7.77

3.84

1.86

 

 

 

305/30/50

50

17.93

D

1.88

3.35

5.24

6.55

7.00

8.00

9.80

10.00

 

 

 

255/30/100

100

14.01

25×5

U

58.70

31.02

18.42

10.53

6.62

4.91

2.25

 

 

 

255/30/50

50

15.41

D

2.08

3.47

5.05

6.00

7.00

8.90

10.00