9 catalog expanded metal bar crating

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EXPANDED METALExpanded Metal is a single sheet of steel that has been cut and expanded by the actionof a special knife which acts as both a cutting shear and forming die. The knife first piercesand slits the steel sheet, then expands these slits into the openings characteristic ofExpanded Metal. It is lighter per foot and stronger per pound than the solid sheet of steelfrom which it is made. Being made from a solid sheet of steel, it can never ravel or fray.Its uses are many and varied: machine guards, storage bins, baskets, tool enclosures,platforms, stair treads, room dividers, lawn furniture, decorative grills, and many more.

STANDARD EXPANDED METAL(SAFE-T-MESH)

This is the unflattened form of Expanded Metal. The diamond strands are rectangular andat a sharp angle to the original plane of the metal sheet from which they were formed,allowing maximum air circulation and visibility. It can be cut or formed to almost anysize and shape required.

FLATTENED EXPANDED METALFlattened Expanded Metal is formed by the same cutting and expanding operations usedin making Safe-T-Mesh, but with the addition of one more step. After the metal is cut andexpanded, it is passed through a series of rolls that flatten and smooth the strands andbridges. The resulting sheet of expanded metal is approximately two gauges thinner thanthe original sheet, although all the original metal is retained.

CHATHAM STEEL CORPORATION 107

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WELDED STEEL GRATING & TREADSOpen steel flooring is manufactured of square-edge strips for your safety. This gives it anon-slip surface and permits light and air to pass through.

It is made in several types: Standard Welded, Heavy Welded, Serrated, and is useduniversally where strong rigid flooring is desired.

We can supply for immediate delivery. Welded Type in panels 24" and 36" wide and inlengths up to 24'. It can also be furnished in 36' lengths for special applications. Standardstock is painted black, but can easily be galvanized when required.

Steel flooring can be cut to specified sizes, as requested.

When ordering open steel flooring, specify the following:1. Type of grating.2. Depth and thickness of bearing bars.3. Dimensions of area or areas to be covered. Unless otherwise specified, our standard

tolerance of 1/4" will apply.4. Span (direction of bearing bars).5. Finish — mill unless otherwise specified.6. Type of fasteners — if required.7. Complete shipping instructions.8. Drawing showing grating area and supports.9. Specify whether drawings for approval and/or erection drawings are required.

The best type for use where floors are subject to extreme corrosion or moisture —chemical plants, breweries and other process industries. There are no cracks,open joints, or holes in bars.

All/weld gratings are furnished with 5/16" twisted square cross bars.

TypeW/B

TypeW/F

TypeW/D

TypeW/DF

SP

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OR

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Approved for all general purposes.

Same as Type W/B but with closecross bars for conditions wheremore steel area is required.

Close bearing bars. Best for heavypublic traffic, or where smalleropenings or increased carryingcapacity are required.

With closer cross bar and bearingbars. For conditions requiringgreatly reduced net opening.

SERRATEDALL-WELD GRATINGWhere moisture, oil or greaseare present, an extra measureof safety can be provided byusing serrated All-Weld gratingas pictured here.

112 CHATHAM STEEL CORPORATION

*1⁄4 thickness only on all I-bar sizes.

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4.2

3.7

4.4

5.8

8.0

8.0

5.8

1121 ⁄4

x13 ⁄1

65.

77.

06.

17.

411

.013

.56.

15.

47.

89.

13.

84.

64.

04.

96.

48.

78.

86.

412

21 ⁄2x1

3 ⁄16

6.3

7.8

6.7

8.1

12.2

14.8

6.4

5.7

8.6

10.0

4.0

4.9

4.2

5.1

7.2

9.7

9.6

7.0


STAIR TREADSStair treads are fabricated in any grating type, complete with carrier plates at each endof tread for bolting to stair stringers. Tread nosing makes the leading edge of each stepstand out clearly. Serrated treads are recommended to eliminate hazardous footingconditions.

Treads can be made to any specification required.

11 ⁄4"

Che

cker

edP

late

Ste

eltr

ead

son

ly

11 ⁄4"

Ab

rasi

ve

Ste

elan

dA

lum

inum

Trea

ds

11 ⁄4"

Cor

ratr

ed

Alu

min

umTr

ead

son

ly*S

teel

Trea

ds

13 ⁄4"

upto

and

incl

udin

g11 ⁄4

"d

eep

trea

ds

21 ⁄4"

for

othe

rsA

lum

inum

Trea

ds

21 ⁄4"

alld

epth

s7 ⁄1

6"o/

hole

&sl

otfo

r3⁄8

"o/

bol

t.

TABLE

OFSTA

NDARDTREADWIDTHSFO

R:

Ste

elgr

atin

gw

ithch

ecke

red

pla

teno

sing

.A

lum

inum

grat

ing

with

corr

atre

dno

sing

.(T

read

sw

ithab

rasi

veno

sing

sar

e1 ⁄8

"le

ssin

wid

th)

RECTA

NGULA

R(DIM

ENSIONA)

RIVETED

BW/B

IBHOLE

CENTERS

TYPEK(1 ⁄

16B.B.)

63 ⁄821 ⁄2

67 ⁄8

71 ⁄241 ⁄2

81 ⁄8

83 ⁄441 ⁄2

91 ⁄2

97 ⁄871 ⁄2

103 ⁄4

111 ⁄8

71 ⁄212

1 ⁄8

121 ⁄4

71 ⁄213

3 ⁄8


Bea

ring

Bar

Sp

an

Siz

e2'

-0"

2'-6

"3'

-0"

3'-6

"4'

-0"

4'-6

"

U38

624

717

212

696

7613 ⁄4

x11 ⁄8

D.0

95.1

51.2

16.2

95.3

74.4

86C

386

308

258

220

194

171

D.0

76.1

19.1

73.2

34.3

08.3

89

U57

837

025

818

814

411

513 ⁄4

x13 ⁄1

6D

.095

.151

216

.295

.374

.486

C57

846

238

633

128

925

7S

pan

D.0

76.1

19.1

73.2

34.3

08.3

895'

0"5'

6"6'

0"

U68

643

930

422

417

113

510

991

7611 ⁄8

x11 ⁄8

D.0

72.1

11.1

59.2

19.2

88.3

66.4

51.5

47.6

73C

686

549

457

392

343

305

275

250

228

D.0

57.0

90.1

29.1

76.2

31.2

93.3

60.4

34.5

18

U10

2965

945

933

825

720

316

413

511

413 ⁄1

6x3 ⁄1

6D

.072

.111

.159

.219

.288

.366

.451

.547

.673

C10

2982

468

658

751

445

841

237

534

3S

pan

D.0

57.0

90.1

29.1

76.2

31.2

93.3

60.4

34.5

186'

6"7'

0"

U10

2768

647

635

026

821

217

214

211

910

187

11 ⁄4x1

1 ⁄8D

.057

.090

.129

.176

.231

.291

.358

.433

.520

.608

.704

C10

2785

871

661

353

647

743

039

035

833

030

6D

.046

.072

.104

.141

.183

.233

.288

.349

.416

.487

.565

LOAD&DEFLECTIONS

SAFE

LOADTA

BLE

FORSTEELGRATING

(Based

onaminimum

allowablefib

erstress

of18,000

P.S.I.)

U—

Saf

eun

iform

load

inp

ound

sp

ersq

uare

foot

.C—

Saf

eco

ncen

trat

edlo

adin

pou

nds

per

foot

ofw

idth

.D—

Def

lect

ion

inin

ches

.


U16

0810

2871

652

640

331

825

821

317

915

213

111 ⁄4

x13 ⁄1

6D

.057

.090

.129

.176

.231

.291

.358

.433

.520

608

.704

C16

0812

8510

7391

880

371

664

458

553

649

545

9S

pan

D.0

46.0

72.1

0414

1.1

83.2

33.2

88.3

49.4

16.4

87.5

658'

-0"

9'0"

U15

4498

768

650

538

730

624

820

517

214

912

896

7511 ⁄2

x11 ⁄8

D.0

47.0

75.1

06.1

4719

2.2

43.3

00.3

65.4

33.5

06.5

87.7

74.9

78C

1544

1235

1029

883

772

687

619

563

515

475

441

386

342

D.0

38.0

59.0

87.1

17.1

54.1

95.2

41.2

89.3

47.4

06.4

70.6

14.7

77

U23

2114

8510

3175

858

145

837

130

726

022

219

114

511

511 ⁄2

x13 ⁄1

6D

.047

.075

.106

.147

.192

.243

.300

.365

.433

.506

.587

.774

.978

C23

2118

5615

4713

2511

5910

3192

884

477

371

466

358

151

5D

.038

.059

.087

.117

.154

.195

.241

.289

.347

.406

.470

.614

.777

U31

5120

1614

0110

2978

862

250

541

635

129

925

919

715

513 ⁄4

x13 ⁄1

6D

.042

.064

.092

.126

.165

.208

.258

.310

.371

.435

.506

.664

.838

C31

5125

2121

0018

0015

7514

0012

6011

4510

4996

989

978

670

0D

.033

.052

.074

.101

.132

.167

.206

.249

.297

.347

.403

.527

.667

U41

1626

3318

2913

4410

2981

365

954

646

039

333

925

820

421 ⁄4

x13 ⁄1

6D

.036

.056

.081

.111

.144

.183

.226

.273

.325

.384

.447

.580

.732

C41

1632

9227

4523

5120

5818

2816

4614

9613

7012

6611

7510

2791

4D

.029

.045

.064

.088

.115

.145

.180

.217

.259

.303

.353

.460

.583

U52

0933

3223

1416

7013

0210

2883

568

958

349

642

832

725

921 ⁄4

x13 ⁄1

6D

.032

.050

.072

.098

.127

.162

.199

.241

.287

.338

.393

.512

1.6

46C

5209

4167

3473

2916

2604

2314

2082

1892

1733

1601

1487

1301

1157

D.0

26.0

39.0

57.0

79.1

02.1

29.1

60.1

94.2

30.2

70.3

14.4

10.5

18

U64

3241

1528

5820

9916

0912

7110

2985

072

061

352

940

532

021 ⁄2

x13 ⁄1

6D

.028

.044

.064

.088

.116

.145

.180

.217

.260

.305

.354

.465

.586

C64

3251

4742

8636

7332

1428

5825

7123

3821

4119

7718

3616

0714

29D

.023

.036

.051

.071

.092

.116

.144

.173

.207

.242

.282

.369

.467

2'-0

"2'

-6"

3'-0

"3'

-6"

4'-0

"4'

-6"

5'-0

"5'

-6"

6'-0

"6'

-6"

7'-0

"

CONTINUATIONOFPA

GE114

Sp

ans

torig

htof

vert

ical

line

NO

TR

EC

OM

ME

ND

ED

.

SAFE LOAD TABLE FOR STEEL GRATING(Based on a minimum allowable fiber stress of 18,000 P.S.I.)U—Safe uniform load in pounds per square foot.C—Safe concentrated load in pounds per foot of width.D—Deflection in inches.

NOTES


9 catalog expanded metal bar crating

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