BAR GRATING

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ALUMINUM RIVETEDA type of aluminum

grating, which combines

straight bearing bars and bent

connectingbars riveted together at their contact points. Riveted grating, although being the oldest style of industrial footwalk, is still the choice of many engineers due to its reliability and durability. All popular sizes and spacings of riveted grating are available.

ALUMINUM PLANKA type of

extruded grat-ing, which is

available In 6" wide sections, and either

plain sided or Interlocking. Plank can be

provided in sections up to 26'0" in length, or fabricated per plans and specs. Plank grating is available unpunched as an eco-nomical and structurally superior substitute for aluminum checkerplate, or with a vari-ety of punch/patterns.

Aluminum ProductsALUMINUM

FLUSH TOP A type of pressure

locked grating in which the cross

bars are in the same plane rela-tive to the top surface

of the grating. Bearing bar sizes range from 1" x 1/8" through 2-1/2" x 3/16" in 1/4" increments. Bearing bar spacing of 13/16", 15/16", 11/16" and 7/16" c.c. and cross bar spacing of 4" or 2" are available. Where skid resistance is desired, a serrated surface can be provided.

ALUMINUM RECTANGULAR

BARA type of

pressure lockedgrating madeby

permanentlyattaching cross bars to bearing bars through a pressure applied swaging pro-cess. Bearing bar sizes range from1" x 1/8" through 2-1/2" x 3/16" in 1/4"increments. Bearing bar spacing of 13/16", 15/16", 11/16" and 7/16" c.c., with cross bar spacing of 4" or 2" are available. Where skid resistance is desired, aserrated surface can be provided.

ALUMINUM I-BARA type of pressure

locked grating, which utilizes

an “I” shaped bearing bar ranging in size from 1" x 1/4" through

2-1/2" x1/4" in 1/4"increments. Bearing bar spacing of 13/16" and 15/16" c.c. and cross bar spacings of 4" or 2" are available. The I-Bar design takes advantage of the aluminum extru-sion process by placing the metal where it is most effective, at the outermost fiber, while reducing the thickness of the neutral axis web. This design consideration allows the same load carrying capacity at less weight per square foot than rectangular bar, therefore resulting in a cost savings.

PRESSURE LOCKINGThe most common method of manufactur-ing aluminum bar grating is through a process known as pressure locking.

Pressure locked grating as de-fined by the NAAMM

Metal Bar Grat-ing Manual is “Grating in which the cross bars aremechanically locked to

the bearing bars at their intersections by deforming or swaging the metal.” Direct Metals provides a permanently attached pressure locked joint, which will give long lasting life under normal service conditions.

Aluminum Plank Grating

GRATING TYPES AVAILABLE IN ALUMINUM

Where economy is a major consideration, the I-Bar SGI Series offers a popular andreasonably priced alternative to rect-angular bar grating. Extruded I-Bar sections have the same load carrying capacity, with less weight per square foot than rectangular bars. The stri-ated top and bottom flanges provide a “built-in” skid resistance feature without the added cost of serrating.

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BAR GRATING

Aluminum 19 Space (1-3/16") Load Table

0.329

0.206 1 - 1/4 x 1/8 47 2.08

1 - 1/4 x 3/16 3.01 0.493

2.34 0.308

0.474

0.355

52

1 - 1/2 x 1/8

1 - 1/2 x 3/16 3.56 0.711

1 - 3/4 x 3/16

2 x 3/16

2 - 1/4 x 3/16

2 - 1/2 x 3/16 5.79 1.974

5.24 1.599

4.68 1.263

0.9674.12

2.70 0.533

4.15 2.467

3.75 1.798

3.43 1.263

0.8463.06

53

59

66

73

80

87

2.46

1.99 0.158

1 x 1/8 39 1.710.211

0.105

1 x 3/1644

2.46 0.316

UDCDUDCDUDCDUDCDUDCDUDCDUDCDUDCDUD CDUDCD

4210.144

4210.115

6320.144

6320.115

6580.115

6580.092

9870.115

9870.092

9470.096

9470.07714210.09614210.07719340.08219340.06625260.07225260.05831970.06431970.05139470.05839470.046

2690.225

3370.180

4040.255

5050.180

4210.180

5260.144

6320.180

7890.144

6060.150

7580.120

9090.15011370.12012380.12915470.10316170.11320210.09020460.10025580.08025260.09031580.072

1870.324

2810.259

2810.324

4210.259

2920.259

4390.207

4390.259

6580.207

4210.216

6320.173

6320.216

9470.173

8600.18512890.14811230.16216840.13014210.14421320.11517540.13026320.104

137.441241

0.353206

0.441361

0.353215

0.353376

0.282322

0.353564

0.282309

0.294541

0.235464

0.294812

0.235632

0.25211050.202

8250.22114440.17610440.19618270.15712890.17622560.141

1580.576

3160.461

1640.461

3290.369

2470.461

4930.369

2370.384

4740.307

3550.384

7110.307

4840.329

9670.263

6320.28812630.230

7990.25615990.205

9870.23019740.184

1950.583

4390.467

1870.486

4210.389

2810.486

6320.389

3820.417

8600.333

4990.36511230.292

6320.32414210.259

7800.29217540.233

2270.600

5680.480

3090.514

7740.411

4040.45010110.360

5120.40012790.320

6320.36015790.288

2560.622

7030.498

3340.545

9190.436

4230.48411630.387

5220.43614350.348

2150.741

6450.592

2810.648

8420.518

3550.57610660.461

4390.51813160.415

2390.761

7770.608

3030.676

9840.541

3740.60812150.487

2610.784

9140.627

3220.70611280.564

2470.922

9870.737

Bar Size,Inches

PedSpanInches

Wt.*Lbs.

Sq. Ft. 2'- 0" 2'- 6" 3'- 0" 3'- 6" 4'-0" 4'- 6" 5'- 0" 5'- 6" 6'- 0" 6'- 6" 7'- 0" 8'- 0"

Sec. PropSx*, in3

Ix*, in4

U - Safe uniform load in pounds sq. ft.C - Safe concentrated load in pounds/ft. grating widthD - Deflection in inches

Loads and deflections given in this table are theoretical and are based on a unit stress of 12,000 psi.

Clear Span

Panel Width Chart (in.) 19-SG-4/19SG-2 Dimensions Are Out-to-Out of Bearing Bars**

**Bar thickness is 1/4" at top and bottom. Add 1/4" for extended cross bars. Standard panel widths indicated in bold.

No. of Bars 2 3 4 5 6 7 8 91/4" Flange 1-7/16 2-5/8 3-13/16 5 6-3/16 7-3/8 8-9/16 9-3/4

No. of Bars 10 11 12 13 14 15 16 171/4" Flange 10-15/16 12-1/8 13-5/16 14-1/2 15-11/16 16-7/8 18-1/16 19-1/4No. of Bars 18 19 20 21 22 23 24 251/4" Flange 20-7/16 21-5/8 22-13/16 24 25-3/16 26-3/8 27-9/16 28-3/4

No. of Bars 26 27 28 29 30 311/4" Flange 29-15/16 31-1/8 32-5/16 33-1/2 34-11/16 35-7/8

I-Bar

I-Bar

I-Bar

I-Bar

I-Bar

I-Bar

I-Bar

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BAR GRATING

Aluminum I-Bar & Rectangular Bar (SGI Series)7-SGI-4 7-SGI-2

7/16"

7-SGI-4 4"

SPAN

7/16"

7-SGI-2

SPAN

2"

7-SGI-4 7-SGI-2 Panel Width Chart (in.) Dimensions Are Out-to-Out of Bearing Bars**No. of Bars 2 3 4 5 6 7 8 9 10 11 12 13 14 15 161/4" Flange 11/16 1-1/8 1-9/16 2 2-7/16 2-7/8 3-5/16 3-3/4 4-3/16 4-5/8 5-1/16 5-1/2 5-15/16 6-3/8 6-13/16

No. of Bars 17 18 19 20 21 22 23 24 25 26 27 28 29 30 311/4" Flange 7-1/4 7-11/16 8-1/8 8-9/16 9 9-7/16 9-7/8 10-5/16 10-3/4 11-3/16 11-5/8 12-1/16 12-1/2 12-15/16 13-3/8

No. of Bars 32 33 34 35 36 37 38 39 40 41 42 43 44 45 461/4" Flange 13-13/16 14-1/4 14-11/16 15-1/8 15-9/16 16 16-7/16 16-7/8 17-5/16 17-3/4 18-3/16 18-5/8 19-1/16 19-1/2 19-15/16

No. of Bars 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 1/4" Flange 20-3/8 20-13/16 21-1/4 21-11/16 22-1/8 22-9/16 23 23-7/16 23-7/8 24-5/16 24-3/4 25-3/16 25-5/8 26-1/16 26-1/2

No. of Bars 62 63 64 65 66 67 68 69 70 71 72 73 74 75 761/4" Flange 26-15/16 27-3/8 27-13/16 28-1/4 28-11/16 29-1/8 29-9/16 30 30-7/16 30-7/8 31-5/16 31-3/4 32-3/16 32-5/8 33-1/16No. of Bars 77 78 79 80 81 82 83 1/4" Flange 33-1/2 33-15/16 34-3/8 34-13/16 35-1/4 35-11/16 36-1/8

**Bar thickness is 1/4" at top and bottom. Add 1/4" for extended cross bars.

*Based on 27.429 bars/ft. of grating width. Bearing bars 7/16" c.c. Add .3 lbs./sq. ft. for 7-SG-2. 1/8" bearing bars available by inquiry. Note: Grating for spans to the left of the heavy line have a deflection less than 1/4" for uniform loads of 100 lbs./sq. ft. This is the maximum deflection to afford pedestrian comfort and can be exceeded for other types of load at the discretion of the engineer.

PedSpan,Inches

56

66

76

85

94

103

111

Wt.*Lbs.

Sq. Ft.

6.30

7.78

9.28

10.80

12.32

13.83

15.33

Sec. PropSx*, in3

Ix*, in4

0.857

0.429

1.339

0.837

1.929

1.446

2.625

2.297

3.429

3.429

4.339

4.882

5.357

6.697

UDCDUDCDUDCDUDCDUDCDUDCDUDCD

ClearSpan

2'- 0" 2'- 6" 3'- 0" 3'- 6" 4'- 0" 4'- 6" 5'- 0" 5'- 6" 6'- 0" 6'- 6" 7'- 0" 8'- 0"1714

0.1441714

0.1152679

0.1152679

0.0923857

0.0963857

0.0775250

0.0825250

0.0666857

0.0726857

0.0588679

0.0648679

0.051107140.058107140.046

10970.2251371

0.1801714

0.1802143

0.1442469

0.1503086

0.1203360

0.1294200

0.1034389

0.1135486

0.0905554

0.1006943

0.0806857

0.0908572

0.072

7620.3241143

0.2591190

0.2591786

0.2071714

0.2162571

0.1732333

0.1853500

0.1483048

0.1624572

0.1303857

0.1445786

0.1154762

0.1307143

0.104

5600.441

9800.353

8750.3531531

0.2821259

0.2942204

0.2351714

0.2523000

0.2022239

0.2203918

0.1762834

0.1964959

0.1573499

0.1766123

0.141

4290.577

8570.461

6700.4611339

0.369964

0.3841929

0.3071313

0.32926250.2631714

0.2883429

0.2302170

0.2564339

0.2052679

0.2305357

0.184

3390.730

7620.583

5290.5831190

0.466762

0.4861714

0.3891037

0.4172333

0.3331355

0.3653048

0.2921714

0.3243857

0.2592116

0.2924762

0.233

2740.899

6860.720

4290.7211071

0.576617

0.6001543

0.480840

0.5142100

0.4111097

0.4502743

0.3601389

0.4003471

0.3201714

0.3604286

0.288

3540.871

9740.697

5100.7261403

0.581694

0.6221909

0.498907

0.5452494

0.4361148

0.4843156

0.3871417

0.4363896

0.348

2981.038

8930.830

4290.8651286

0.691583

0.7401750

0.592762

0.6482286

0.518964

0.5762893

0.4611190

0.5183571

0.415

3651.0141187

0.811497

0.8691615

0.695649

0.7602110

0.608822

0.6762670

0.5411014

0.6083297

0.487

U - Safe uniform load in pounds/sq. ft.C - Safe concentrated load in pounds/ft. grating widthD - Deflection in inches

Loads and deflectionsgiven in this table are the-oretical, and are based on a unit stress of 12,000 psi.

4291.0091500

0.806560

0.8821959

0.706708

0.7832480

0.627875

0.7063061

0.564

3281.3161313

1.054429

1.1531714

0.921542

1.0232170

0.819670

0.9222679

0.737

Bar Size,Inches

1 x 3/16

1-1/4 x 3/16

1-1/2 x 3/16

1-3/4 x 3/16

2 x 3/16

2-1/4 x 3/16

2-1/2 x 3/16

1" I-Bar

1-1/4" I-Bar

4.79

5.75

1-1/2" I-Bar 6.74

1-3/4" I-Bar 7.70

2" I-Bar 8.71

2-1/4" I-Bar 9.59

2-1/2" I-Bar 10.66

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Aluminum Plank Section AvailabilityAluminum Plank is structurally sound and cosmetically attractive. Plank grating is non-sparking, non-magnetic, non-skid and relatively maintenance free. It is durable, corrosion resistant, and possesses a high strength-to-weight ratio. The surface can be provided unpunched or with a variety of punch/patterns for the passage of air, light, heat or moisture. The interconnecting webs offer a flush top walking surface. Aluminum plank grating has found application in sew-age and waste water treatment plants, as well as in the marine refrigerator (reefer), freezers and cargo-hold flooring market.Aluminum plank grating is available in five cross-sectional designs: Heavy Duty (plain sides), Heavy Duty (interlocking sides), Light Series (plain sides), Reefer (plain sides) and Reefer (interlocking sides).

The Heavy Duty sections are used primarily in water and waste treatment and the marine markets, while the Light Series and Reefer sections are exclusively in the marine refrigerator applications.Interlocking Heavy Duty, Reefer sections and edge sections are available in 1" deep grating only.

Plank Punch / Pattern AvailabilityAluminum plank grating is available unpunched or with a variety of punch/patterns as shown below. Rectangular or square punched holes are most commonly used for water and waste treatment plants, and in marine applications, while the round holes find applications primarily in the marine market. The surface of plank grating can be specified as plain, or with one of two styles of upsets designed to promote a slip resistant walkway, especially in the presence of moisture, oil or other spilled substances.

REEFER (Plain Sides)

REEFER PUNCH/PATTERNAVAILABILITY

HEAVY DUTY (Plain Sides)

3/4"thru

2-1/2"

1.200" 1.200"

6"1" only

1.500"

6"

3" FEMALE EDGE 3" MALE EDGE

1" only

1" only

1.500"

1.500" 1.500"

6"

HEAVY DUTY (Interlocking Sides)

LIGHT SERIES (Plain Sides)

1.200"

1.200"

1.200"2.400"

1.200"

2-1/2" FEMALE EDGE 2-1/2" MALE EDGE

1" only

1" only

1" only

6"

6"

REEFER (Interlocking Sides)

ADA Compliant

BAR GRATING