Designing, Terminology

Designing

On the following pages, you can find information on gratings, surface treatment, dimensions, mesh widths and tolerances.

Design

Weland´s technical department is available for advice regarding dimensioning as well as the production of layout drawings and designs of different Weland products.



Selecting grating length and layout

When establishing layout drawings the panel size should be based on the standard width of the grating (1000 mm) to achieve best possible economy.

If the grating is to be laid across a number of support beams, choose a length of grating that spans across as many supports as possible. This results in less deflection under load, you get a pleasant overall pattern and a minimum number of joints.

Avoid square shaped gratings to avoid incorrect positioning of the load bearing bars (the load bearing part of the grating).



Tagging

Every panel is provided with a marking tag with distinct characters indicating reference to the layout drawing, which makes site fixing easier.



Presswelded grating, grating tolerances

Length, width and diagonal dimension

Maximum tolerances +0 -4 mm.

Maximum length of cross bar ends

2 mm.

Max. length of cross bar ends
ZoomIn

Load Bearing Bar deflection

Max. load bearing bar deflection is 1/200 of the span.

Load-bearing bar bending
ZoomIn

Cross bar pitch

Cross bar division
ZoomIn


Presswelded grating, Mesh Sizes

Grating type
(mm)
Mesh Size c/c
AxB (mm)
Height of Load Bearing Bar
C (mm)

B9

12 x 100

[ExpandCollapse]

20, 25, 30, 35, 40

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 39.7 41.7
25/3 49.0 51.5
30/3 58.3 61.2
35/3 67.6 71.0
40/3 76.9 80.7

N4

17 x 50

[ExpandCollapse]

20, 25, 30, 35, 40

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 21.2 22.9
25/2 23.8 25.8
30/2 28.2 30.5
35/2 34.7 37.5
40/2 39.3 42.4
20/3 32.8 34.5
25/3 39.7 41.7
30/3 46.6 49.0
35/3 53.5 56.2

N6

17 x 75

[ExpandCollapse]

20, 25, 30

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 18.8 20.3
25/2 23.2 25.1
30/2 27.6 29.8

N9

16 x 100

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 28.3 29.7
25/3 34.9 36.7
30/3 41.6 43.7
35/3 50.9 53.5
40/3 57.9 60.7
45/3 64.8 68.0
50/3 72.0 75.0

D4

22 x 50

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 26.0 27.3
25/3 31.2 32.8
30/3 36.4 38.3
35/3 41.6 43.7
40/3 46.9 49.2
45/3 52.1 54.7
50/3 57.3 60.1
30/4 47.2 50.0
35/4 54.2 57.5
40/4 61.2 64.9
45/4 68.2 72.3
50/4 75.2 79.8
60/4 89.2 94.6
20/5 40.4 42.4
25/5 49.2 51.6
30/5 58.0 60.9
35/5 66.8 70.1
40/5 75.6 79.4
45/5 84.4 88.6
50/5 93.2 97.9
60/5 110.8 116.3

D6

22 x 75

[ExpandCollapse]

20, 25

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/2 19.1 20.1
20/3 22.9 24.0

F4

25 x 50

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60, 70, 80

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 23.8 24.9
25/3 28.4 29.8
30/3 33.0 34.7
35/3 37.7 39.6
40/3 42.3 44.4
45/3 47.0 49.3
50/3 51.6 54.2
30/4 42.6 45.2
35/4 48.9 51.8
40/4 55.1 58.4
45/4 61.4 65.1
50/4 67.6 71.7
60/4 80.1 84.9
70/4 92.6 98.2
80/4 105.1 111.4
20/5 36.6 38.4
25/5 44.4 46.6
30/5 52.3 54.9
35/5 60.1 63.1
40/5 67.9 71.3
45/5 75.8 79.6
50/5 83.6 87.8
60/5 99.3 104.3
70/5 115.0 120.8
80/5 130.7 137.2

H3

33 x 37

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60, 70, 80

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 13.0 14.0
25/2 13.7 14.8
30/2 16.0 17.3
35/2 21.6 23.3
40/2 20.4 22.1
20/3 16.2 17.0
25/3 19.6 20.6
30/3 23.0 24.2
35/3 27.9 29.3
40/3 31.3 32.8
45/3 34.7 36.4
50/3 38.1 40.0
30/4 35.2 37.4
35/4 40.0 42.4
40/4 44.7 47.4
45/4 49.4 52.4
50/4 54.1 57.4
60/4 63.6 67.4
70/4 73.0 77.4
80/4 82.5 87.4
20/5 30.6 32.5
25/5 36.6 38.8
30/5 42.5 45.1
35/5 48.4 51.3
40/5 54.4 57.6
45/5 60.3 63.9
50/5 66.2 70.2
60/5 78.1 82.8
70/5 90.0 95.4
80/5 101.8 107.9

H4

33 x 50

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60, 70, 80

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 12.3 13.2
25/2 14.6 15.7
30/2 16.9 18.2
35/2 19.2 20.7
40/2 21.5 23.2
20/3 16.7 17.5
25/3 20.6 21.6
30/3 24.1 25.3
35/3 27.6 29.0
40/3 31.2 32.7
45/3 36.8 38.6
50/3 40.3 42.3
30/4 33.5 35.5
35/4 38.2 40.5
40/4 42.9 45.5
45/4 47.7 50.5
50/4 52.4 55.5
60/4 61.8 65.5
70/4 71.3 75.6
80/4 80.7 85.6
20/5 28.9 30.4
25/5 34.8 36.6
30/5 40.8 42.8
35/5 46.7 49.0
40/5 52.6 55.3
45/5 58.6 61.5
50/5 64.5 67.7
60/5 76.4 80.2
70/5 88.2 92.6
80/5 100.1 105.1

H6

33 x 75

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/2 12.4 13.1
30/2 14.7 15.4
40/2 19.1 20.1
20/3 16.1 16.9
25/3 19.6 20.6
30/3 23.1 24.3
35/3 26.6 27.9
40/3 30.1 31.6
45/3 33.6 35.3
50/3 37.1 39.0

H9

33 x 100

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 16.6 17.5
25/3 20.1 21.2
30/3 23.7 24.8
35/3 27.2 28.5
40/3 30.7 32.2
45/3 34.2 35.9
50/3 37.7 39.6
30/4 30.9 32.8
35/4 35.6 37.8
40/4 40.4 42.8
45/4 45.1 47.8
50/4 49.8 52.8
20/5 26.3 27.6
25/5 32.2 33.9
30/5 38.2 40.1
35/5 44.1 46.3
40/5 50.0 52.5
45/5 56.0 58.8
50/5 61.9 65.0
60/5 73.8 77.5

J9

41 x 100

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 13.9 14.6
25/3 16.7 17.6
30/3 19.6 20.6
35/3 22.4 23.5
40/3 25.2 26.5
45/3 28.1 29.5
50/3 30.9 32.4
30/4 25.4 27.0
35/4 29.2 31.0
40/4 33.0 35.0
45/4 36.9 39.1
50/4 40.7 43.1
60/4 48.3 51.2
20/5 21.7 22.8
25/5 26.5 27.8
30/5 31.3 32.9
35/5 36.1 37.9
40/5 40.9 42.9
45/5 45.6 47.9
50/5 50.4 52.9
60/5 60.0 63.0

I6

66 x 75

[ExpandCollapse]

20, 25, 30

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 9.2 9.7
25/3 11.1 11.6
30/3 12.9 13.5

I4

68 x 50

[ExpandCollapse]

20

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 7.5 8.1

I9

100 x 100

[ExpandCollapse]

20, 25, 30

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/3 7.6 8.0
25/3 8.8 9.3
30/3 10.1 10.6

Anti-slip grating

Grating type
(mm)
Mesh Size c/c
AxB (mm)
Height of Load Bearing Bar
C (mm)

N9-T

16 x 100

[ExpandCollapse]

25, 30, 35, 40

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 37.1 39.0
30/3 44.0 46.2
35/3 50.9 53.5
40/3 57.9 60.7

H4-T

33 x 50

[ExpandCollapse]

25, 30, 35, 40, 45, 50, 60, 80

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/2 14.6 15.7
25/3 20.6 21.6
30/3 24.1 25.3
35/3 27.6 29.0
40/3 31.2 32.7
45/3 36.8 38.6
50/3 40.3 42.3
30/4 33.5 35.5
35/4 38.2 40.5
40/4 42.9 45.5
45/4 47.7 50.5
50/4 52.4 55.5
60/4 61.8 65.5
80/4 80.7 85.6
25/5 34.8 36.6
30/5 40.8 42.8
35/5 46.7 49.0
40/5 52.6 55.3
45/5 58.6 61.5
50/5 64.5 67.7
60/5 76.4 80.2

F4-T

25 x 50

[ExpandCollapse]

25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 28.4 29.8
30/3 33.0 34.7
35/3 37.7 39.6
40/3 42.3 44.4
45/3 47.0 49.3
50/3 51.6 54.2
30/4 42.6 45.2
35/4 48.9 51.8
40/4 55.1 58.4
45/4 61.4 65.1
50/4 67.6 71.7
60/4 80.1 84.9
25/5 44.4 46.6
30/5 52.3 54.9
35/5 60.1 63.1
40/5 67.9 71.3
45/5 75.8 79.6
50/5 83.6 87.8
60/5 99.3 104.3

H9-T

33 x 100

[ExpandCollapse]

25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 20.1 21.2
30/3 23.7 24.8
35/3 27.2 28.5
40/3 30.7 32.2
45/3 34.2 35.9
50/3 37.7 39.6
30/4 30.9 32.8
35/4 35.6 37.8
40/4 40.4 42.8
45/4 45.1 47.8
50/4 49.8 52.8
25/5 32.2 33.9
30/5 38.2 40.1
35/5 44.1 46.3
40/5 50.0 52.5
45/5 56.0 58.8
50/5 61.9 65.0
60/5 73.8 77.5

J9-T

41 x 100

[ExpandCollapse]

20, 25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 16.7 17.6
30/3 19.6 20.6
35/3 22.4 23.5
40/3 25.2 26.5
45/3 28.1 29.5
50/3 30.9 32.4
30/4 25.4 27.0
35/4 29.2 31.0
40/4 33.0 35.0
45/4 36.9 39.1
50/4 40.7 43.1
60/4 48.3 51.2
20/5 21.7 22.8
25/5 26.5 27.8
30/5 31.3 32.9
35/5 36.1 37.9
40/5 40.9 42.9
45/5 45.6 47.9
50/5 50.4 52.9
60/5 60.0 63.0

HN9-T

35 x 100

[ExpandCollapse]

25, 30, 35, 40, 45, 50

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 23.3 24.5
30/3 26.6 27.9
35/3 29.9 31.4
40/3 33.2 34.8
45/3 36.4 38.3
50/3 39.7 41.7
25/5 34.6 36.4
30/5 40.2 42.2
35/5 45.7 48.0
40/5 51.3 53.8
45/5 56.8 59.7
50/5 62.4 65.5

JN9-T

41 x 100

[ExpandCollapse]

25, 30, 35, 40, 45, 50, 60

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
25/3 24.0 25.2
30/3 26.8 28.1
35/3 29.6 31.1
40/3 32.4 34.1
25/5 33.7 35.4
30/5 38.5 40.4
35/5 43.3 45.4
45/5 52.9 55.5
50/5 57.6 60.5
60/5 67.2 70.6

A-Type Grating, Mesh Sizes

Grating type
(mm)
Mesh Size c/c
AxB (mm)
Height of Load Bearing Bar
C (mm)

A22x22

22 x 22

[ExpandCollapse]

20, 25, 30, 40, 50

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 20.0 22.0
25/2 24.0 26.0
30/2 27.0 29.0
40/2 34.0 36.0
50/2 40.0 44.0

A33x11

33 x 11

[ExpandCollapse]

20, 25, 30, 40, 50

Dim
C/D
Weight(kg/m²)
Untreated Hot dip galvanized
20/2 23.0 25.0
25/2 25.0 27.0
30/2 27.0 30.0
40/2 32.0 34.0
50/2 36.0 39.0

 

 


Opening area grating

Presswelded grating

Calculation of opening area for pressure welded gratings.


Grating type Mesh size Load bearing steel dim. Cross bar steel dim. Opening area %

B9

12 x 100

3 6.5 68.9
N4

17 x 50

2 5 77.8
N4

17 x 50

3 6.5 68.7

N6

17 x 75

2 4 82.6

N9

16 x 100

3 5 77.3
D4

22 x 50

3 6.5 73.2
D4

22 x 50

4 6.5 68.6
D4

22 x 50

5 6.5 64.0
F4

25 x 50

3 6.5 74.7
F4

25 x 50

4 6.5 70.6
F4

25 x 50

5 6.5 66.5

H3

34 x 37

2 4 83.2

H3

34 x 37

3 4 80.2

H3

33 x 37

4 6.5 70.1

H3

33 x 37

5 6.5 67.0
H4

33 x 50

2 5 83.8
H4

33 x 50

3 5 80.7
H4

33 x 50

4 6.5 74.6
H4

33 x 50

5 6.5 71.5

H6

34 x 75

2 4 88.4

H6

33 x 75

3 5 83.7
H9

33 x 100

3 6.5 84.2
H9

33 x 100

4 6.5 81.1
H9

33 x 100

5 6.5 78.0
J9

41 x 100

3 6.5 86.0
J9

41 x 100

4 6.5 83.5
J9

41 x 100

5 6.5 81.0

I6

66 x 75

3 5 88.2

I9

100 x 100

3 6.5 90.2

Anti-slip grating

Calculation of opening area for anti-slip gratings with and without round bar.


Grating type Mesh size Load bearing steel dim. Cross bar steel dim. Opening area %

N9-T

16 x 100

3 5 77.3

H4-T

33 x 50

2 5 83.8

H4-T

33 x 50

3 5 80.7

H4-T

33 x 50

4 6.5 74.6

H4-T

33 x 50

5 6.5 71.5

F4-T

25 x 50

3 6.5 74.7

F4-T

25 x 50

4 6.5 70.6

F4-T

25 x 50

5 6.5 66.5

H9-T

33 x 100

3 6.5 84.2

H9-T

33 x 100

4 6.5 81.1

H9-T

33 x 100

5 6.5 78.0

J9-T

41 x 100

3 6.5 86.0

J9-T

41 x 100

4 6.5 83.5

J9-T

41 x 100

5 6.5 81.0

HN9-T

35 x 100

3 6.5 70.8

HN9-T

35 x 100

5 6.5 65.0

JN9-T

41 x 100

3 6.5 69.2

JN9-T

41 x 100

5 6.5 64.2

A-Type Grating

Calculation of opening area for A-type gratings.


Grating type Mesh size Load bearing steel dim. Cross bar steel dim. Opening area %

A22x22

22 x 22

2 2 82.0

A33x11

33 x 11

2 2 76.0

Grating Dimensions presswelded grating

In the table, the construction dimensions in which the grating can be obtained (with full mesh) are set out.

Marked dimensions indicate standard width.

Example: An order for covering a gutter with grating type N, 1 each 600 x 16885 mm (grating measure) the grating is composed as follows: 16 panels 600 x 1000 and 1 panel 600 x 880 (880 is next to measure 885 in the table).


Grating Dimensions

= constructional dimensions with full mesh. Marked dimensions indicate standard width.

* c/c 34 applies to

Pedestrian walkway multipanels H3 25, 30 and 40
Pedestrian walkway multipanels H6 25, 30 and 40

as well as to

Type H3 25/2, 30/2, 40/2
Type H3 20/3, 25/3, 30/3, 35/3, 40/3, 45/3, 50/3
Type H4 20/3
Type H3 RF 50/3
Type H6 RF 25/2, 25/3

Grating dimensions for grating type
c/c measure = the distance between the load bearing bars

H also applies to stainless steel.
c/c 33
(mm)
H also applies to stainless steel.
c/c 34
(mm)
F



c/c 25
(mm)
D



c/c 22
(mm)
N



c/c 16
(mm)
N



c/c 17
(mm)
B



c/c 12
(mm)
I4 20/2



c/c 68
(mm)
J



c/c 41
(mm)
JN9-T



c/c 41
(mm)
HN9-T



c/c 35
(mm)

1000

1000

1000

1000

1000

1000

700

969

1000

1000

1000

966

962

973

972

982

983

685

898

957

955

961

933

927

949

950

966

965

672

830

914

915

926

900

893

923

928

949

949

659

761

872

874

890

867

858

898

906

933

931

646

692

830

832

855

834

825

873

884

916

914

633

624

788

791

820

801

790

849

862

900

897

620

554

745

750

785

768

756

825

840

883

880

608

487

700

709

750

734

722

799

818

867

862

596

420

662

668

714

700

687

774

797

850

845

584

350

621

626

679

668

653

750

775

834

827

571

282

580

585

644

635

618

725

753

817

811

559

213

540

544

608

602

584

700

731

801

793

547

143

500

503

573

568

551

674

709

784

776

535

75

456

462

538

534

516

650

687

768

759

522

 

416

421

503

500

485

625

665

751

742

511

 

375

380

467

469

451

600

643

734

724

500

 

334

338

432

436

417

575

621

718

707

485

 

293

297

397

403

383

550

599

700

690

473

 

252

256

362

370

348

526

577

683

673

460

 

211

215

326

337

314

500

555

665

656

448

 

171

174

291

304

280

475

533

649

639

436

 

130

132

256

271

246

451

511

632

622

424

 

89

91

221

238

211

426

490

616

605

411

 

48

50

185

205

178

401

468

600

587

399

 

 

 

150

171

144

377

446

583

570

387

 

 

 

115

139

109

352

424

568

553

374

 

 

 

80

106

75

327

402

550

536

362

 

 

 

44

73

40

302

380

534

519

350

 

 

 

 

40

 

278

358

518

502

338

 

 

 

 

 

 

253

336

500

486

326

 

 

 

 

 

 

228

314

483

469

313

 

 

 

 

 

 

204

292

465

452

301

 

 

 

 

 

 

179

270

449

435

289

 

 

 

 

 

 

154

248

433

418

276

 

 

 

 

 

 

130

226

416

400

264

 

 

 

 

 

 

105

204

400

383

252

 

 

 

 

 

 

81

182

383

366

240

 

 

 

 

 

 

56

160

367

349

228

 

 

 

 

 

 

32

139

351

332

215

 

 

 

 

 

 

 

117

334

315

203

 

 

 

 

 

 

 

95

318

298

191

 

 

 

 

 

 

 

73

302

280

178

 

 

 

 

 

 

 

51

285

262

166

 

 

 

 

 

 

 

29

269

246

154

 

 

 

 

 

 

 

 

252

229

142

 

 

 

 

 

 

 

 

236

212

130

 

 

 

 

 

 

 

 

220

195

117

 

 

 

 

 

 

 

 

203

178

105

 

 

 

 

 

 

 

 

187

160

93

 

 

 

 

 

 

 

 

171

143

80

 

 

 

 

 

 

 

 

154

126

68

 

 

 

 

 

 

 

 

137

109

56

 

 

 

 

 

 

 

 

122

92

44

 

 

 

 

 

 

 

 

105

74

31

 

 

 

 

 

 

 

 

89

57

19

 

 

 

 

 

 

 

 

72

40

 

 

 

 

 

 

 

 

 

56

23

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

24

 

 

 

 

 

 


Surface treatment

Surface treatment

Weland's products are delivered as standard hot dip galvanised, according to class SS-EN ISO 1461.

Hot dip galvanisation

The diagram shows the average service life for different thicknesses of zinc in different environments.

Hot Dip Galvanised
ZoomIn

Treatment of stainless steel

Stainless steel grating can be sand-blasted, pickled or electrolytically treated to obtain a good surface finish.

Treatment of stainless steel
ZoomIn

Product Manual

Brochures

Other

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Sales Sweden

Which seller should I contact? (xxxxx)

Fax direct number: +46 (0)371-344 78

Fredrik Albinsson

Direct Telephone Line: +46 (0)371-344 70

E-mail: fredrik.albinsson@weland.se

Vcard: vCard

Mattias Andersson

Direct Telephone Line: +46 (0)371-344 07

E-mail: mattias.andersson@weland.se

Vcard: vCard

Alexander Johnsson

Direct Telephone Line: +46 (0)371-344 49

E-mail: alexander.johnsson@weland.se

Vcard: vCard

Jakob Josefsson

Direct Telephone Line: +46 (0)371-344 31

E-mail: jakob.josefsson@weland.se

Vcard: vCard

Göran Lagesson

Direct Telephone Line: +46 (0)371-344 47

E-mail: goran.lagesson@weland.se

Vcard: vCard

Stefan Lingtell

Direct Telephone Line: +46 (0)371-344 43

E-mail: stefan.lingtell@weland.se

Vcard: vCard

Björn Sandwall

Direct Telephone Line: +46 (0)371-344 67

E-mail: bjorn.sandwall@weland.se

Vcard: vCard

Oscar Welandson

Direct Telephone Line: +46 (0)371-344 98

E-mail: oscar.welandson@weland.se

Vcard: vCard

Johan Palm

Direct Telephone Line: +46 (0)371-344 69

E-mail: johan.palm@weland.se

Vcard: vCard

Sales export

Fax direct number: +46 (0)371-344 78

Jonas André

Direct Telephone Line: +46 (0)371-344 08

E-mail: jonas.andre@weland.se

Vcard: vCard

Hans Larsson

Direct Telephone Line: +46 (0)371-344 03

E-mail: hans.larsson@weland.se

Vcard: vCard