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BAR GRATING - Direct Metals Company€¦ · welded to the grating panel and nosing of a stair...
15
17 800.711.4939 www.directmetals.com BAR GRATING Glossary Terminology ANCHOR - A device by which grating is attached to its supports. BAND - A flat bar welded to the end of a grating panel or along the line of a cutout, and extending neither above nor below the bearing bars. Load-Carrying Band: A band used in a cutout to transfer the load from unsupported bearing bars to the supported bearing bars. Trim Band: A band which carries no load but is used chiefly to improve appearance. BEARING BARS - Load-carrying bars made from steel strip, slit sheet or rolled or extruded aluminum, and extending in the direction of the grating span. BEARING BAR CENTERS - The distance center to center of the bearing bars. CARRIERS - Flats or angles, which are welded to the grating panel and nosing of a stair tread, and are bolted to a stair stringer to support the tread. CLEAR OPENING - The distance between faces of bearing bars in a rectangular grating or between a bent connecting bar and a bearing bar in a riveted grating. CROSS BARS - The connecting bars made from steel strip, slit sheet, rolled bars, or rolled or extruded aluminum, which extend across the bearing bars, usually perpendicular to them. They may be bent into a corrugated or sinuous pattern where they intersect, the bearing bars are welded, forged, or mechanically locked to them. CROSS BAR CENTERS - The distance center to center of the cross bars. CURVED CUT - A cutout following a curved pattern. CUTOUT - An area of grating removed to clear an obstruction or to permit pipes, ducts, columns, etc. to pass through the grating. ELECTRO-FORGED - A process combin- ing hydraulic pressure and heat fusion to forge bearing bars and cross bars into a panel grid. FINISH - The coating, usually paint or galvanizing, which is applied to the grating. FLUSH TOP GRATING - A type of pressure-locked grating, in which the cross bars and bearing bars are in the same plane relative to the top surface of the grat- ing. GRATING - An open grid assembly of metal bars, in which the bearing bars running in one direction are spaced by rigid attachment to cross bars running perpen- dicular to them, or by bent connecting bars extending between them. HINGED PANELS - Grating panels which are hinged to their supports or to other grating parts. I-BAR - An extruded aluminum bearing bar having a cross sectional shape resembling the letter “I”. LENGTH - The dimension of a grating panel measured parallel to the bearing bars. Also referred to as span. LOAD-CARRYING BAND - see Band. NOSING - A special L-section member serving as the front or leading edge of a stair tread or of grating at the head of a stair. PRESSURE-LOCKED GRATING - Grating in which the cross bars are mechanically locked to the bearing bars at their intersections by deforming or swaging the metal. RADIALLY CUT GRATING - Rectangular grating which is cut into panels shaped as annular segments, for use in circular or annular areas. RETICULINE BAR - A sinuously bent connecting bar extending between two adjacent bearing bars, alternately contact- ing and being riveted to each. RIVET CENTERS - The distance center to center of rivets along one bearing bar. RIVETED GRATING - Grating composed of straight bearing bars and bent connect- ing bars, which are joined at their contact points by riveting. SERRATED GRATING - Grating which has the top surfaces of the bearing bars, cross bars or both notched. SPAN OF GRATING - The distance between points of grating support, or the direction of the dimension. Also referred to as length. STRAIGHT CUT - That portion of the cut edge or cutout of a grating, which follows a straight line. SWAGING - A method of altering the cross-sectional shape of a metal bar by pressure applied through dies. TOEPLATE - A flat bar attached against the outer edge of a grating or rear edge of a tread, and projecting above the top surface of grating or tread to form a lip or curb. TREAD - A panel of grating having carriers and nosing attached by welding, and de- signed specifically to serve as a stair tread. WELDED GRATING - Grating in which the bearing bars and cross bars are joined at their intersections by a weld. WIDTH - The overall dimension of a grating panel, measured perpendicular to the bear- ing bars and in the same direction as the cross bars. This catalog uses a form of the NAAMM alpha-numeric designation for bar spacing and manufacturing identification. The first number signifies center-to-center bearing bar spacing in 1/16ths of an inch*. A letter designates method of manufacture. The last number details center-to-center cross bar spacing in whole inches (usually 4" or 2") or rivet spacing (usually 3-1/2", 5" or 7"). Methods of manufacturing and their letter designations used in this catalog include: SG ........ Swaged Rectangular Bar SGF...... Swaged Flush Top SGI ....... Swaged I-Bar W.......... Welded Steel R .......... Riveted (Steel) AR ........ Riveted (Aluminum) FOR EXAMPLE: 19-W-4 – Bearing Bars 19/16" (or 1-3/16") c.c. – Welded Steel Construction – Cross Bars 4" c.c. 15-SGI-2 – Bearing Bars 15/16" c.c. – Swaged I-Bar – Cross Bars 2" c.c. Other Bearing Bar Spacings commonly used throughout the industry are designated thus: 38-W-4 (or 2) Bearing Bars 38/16" c.c. (2-3/8" c.c.) 30-W-4 (or 2) Bearing Bars 30/16" c.c. (1-7/8" c.c.) 22-W-4 (or 2) Bearing Bars 22/16” c.c. (1-3/8” c.c.) 11-SG-4 (or 2) Bearing Bars 11/16" c.c. 7-SG-4 (or 2) Bearing Bars 7/16" c.c. 18-R-7 (or 3-1/2) Bearing Bars 18/16" face-to-face (1-1/8")* 37-R-5 Bearing Bars 37/16" face-to-face (2-5/16")* 12-R-7 (or 3-1/2) Bearing Bars 12/16" face-to-face (3/4")* *Note: Riveted grating marking indicates space between bearing bars.
Transcript of BAR GRATING - Direct Metals Company€¦ · welded to the grating panel and nosing of a stair...
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BAR GRATING
Glossary TerminologyANCHOR - A device by which grating isattached to its supports. BAND - A flat bar welded to the end of a grating panel or along the line of a cutout, and extending neither above nor below the bearing bars. Load-Carrying Band: A band used in a cutout to transfer the load from unsupported bearing bars to the supported bearing bars. Trim Band: A band which carries no load but is used chiefly to improve appearance. BEARING BARS - Load-carrying bars made from steel strip, slit sheet or rolled or extruded aluminum, and extending in thedirection of the grating span. BEARING BAR CENTERS - The distance center to center of the bearing bars. CARRIERS - Flats or angles, which are welded to the grating panel and nosing of a stair tread, and are bolted to a stair stringer to support the tread. CLEAR OPENING - The distance between faces of bearing bars in a rectangulargrating or between a bent connecting bar and a bearing bar in a riveted grating. CROSS BARS - The connecting bars made from steel strip, slit sheet, rolled bars, or rolled or extruded aluminum, which extend across the bearing bars, usually perpendicular to them. They may be bent into a corrugated or sinuous pattern where they intersect, the bearing bars are welded, forged, or mechanically locked to them. CROSS BAR CENTERS - The distance center to center of the cross bars. CURVED CUT - A cutout following a curved pattern. CUTOUT - An area of grating removed to clear an obstruction or to permit pipes, ducts, columns, etc. to pass through the grating. ELECTRO-FORGED - A process combin-ing hydraulic pressure and heat fusion to forge bearing bars and cross bars into a panel grid. FINISH - The coating, usually paint orgalvanizing, which is applied to the grating. FLUSH TOP GRATING - A type of pressure-locked grating, in which the cross bars and bearing bars are in the same plane relative to the top surface of the grat-ing. GRATING - An open grid assembly of metal bars, in which the bearing bars running in one direction are spaced by rigid attachment to cross bars running perpen-dicular to them, or by bent connecting bars extending between them.
HINGED PANELS - Grating panels which are hinged to their supports or to other grating parts. I-BAR - An extruded aluminum bearing barhaving a cross sectional shaperesembling the letter “I”.LENGTH - The dimension of a grating panel measured parallel to the bearing bars. Also referred to as span. LOAD-CARRYING BAND - see Band. NOSING - A special L-section member serving as the front or leading edge of a stair tread or of grating at the head of a stair. PRESSURE-LOCKED GRATING - Grating in which the cross bars are mechanically locked to the bearing bars at their intersections by deforming orswaging the metal. RADIALLY CUT GRATING - Rectangular grating which is cut into panels shaped as annular segments, for use in circular or annular areas. RETICULINE BAR - A sinuously bent connecting bar extending between two adjacent bearing bars, alternately contact-ing and being riveted to each. RIVET CENTERS - The distance center to center of rivets along one bearing bar. RIVETED GRATING - Grating composed of straight bearing bars and bent connect-ing bars, which are joined at their contact points by riveting. SERRATED GRATING - Grating which has the top surfaces of the bearing bars, cross bars or both notched. SPAN OF GRATING - The distancebetween points of grating support, or thedirection of the dimension. Also referred to as length. STRAIGHT CUT - That portion of the cut edge or cutout of a grating, which follows a straight line. SWAGING - A method of altering the cross-sectional shape of a metal bar by pressure applied through dies. TOEPLATE - A flat bar attached against the outer edge of a grating or rear edge of a tread, and projecting above the top surface of grating or tread to form a lip or curb. TREAD - A panel of grating having carriers and nosing attached by welding, and de-signed specifically to serve as a stair tread. WELDED GRATING - Grating in which the bearing bars and cross bars are joined at their intersections by a weld. WIDTH - The overall dimension of a grating panel, measured perpendicular to the bear-ing bars and in the same direction as the cross bars.
This catalog uses a form of the NAAMM alpha-numeric designation for bar spacing and manufacturing identification. The first number signifies center-to-center bearing bar spacing in 1/16ths of an inch*. A letter designates method of manufacture. The last number details center-to-center cross bar spacing in whole inches (usually 4" or 2")or rivet spacing (usually 3-1/2", 5" or 7").
Methods of manufacturing and their letter designations used in this catalog include: SG ........ Swaged Rectangular Bar SGF ...... Swaged Flush Top SGI ....... Swaged I-Bar W .......... Welded Steel R .......... Riveted (Steel) AR ........ Riveted (Aluminum)
FOR EXAMPLE:
19-W-4 – Bearing Bars 19/16" (or 1-3/16") c.c.– Welded Steel Construction– Cross Bars 4" c.c.
15-SGI-2 – Bearing Bars 15/16" c.c.– Swaged I-Bar– Cross Bars 2" c.c.
Other Bearing Bar Spacings commonly used throughout the industry are designated thus:
38-W-4 (or 2) Bearing Bars 38/16" c.c.(2-3/8" c.c.)
30-W-4 (or 2) Bearing Bars 30/16" c.c.(1-7/8" c.c.)
22-W-4 (or 2) Bearing Bars 22/16” c.c.(1-3/8” c.c.)
11-SG-4 (or 2) Bearing Bars 11/16" c.c.7-SG-4 (or 2) Bearing Bars 7/16" c.c.18-R-7 (or 3-1/2) Bearing Bars 18/16"
face-to-face (1-1/8")*37-R-5 Bearing Bars 37/16"
face-to-face (2-5/16")* 12-R-7 (or 3-1/2) Bearing Bars 12/16"
face-to-face (3/4")*
*Note: Riveted grating marking indicatesspace between bearing bars.
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
0.3292625
0.2631714
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
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BAR GRATING
TiteWeld® 7-TW-4 Welded Steel IN STOCK!!
7-TW-4
SPAN SPAN
7/16"
7-TW-4 4"
7/16"
7-TW-2 2"
7-TW-4
TiteWeld® super narrow welded grating - ideal for those very tight spacing requirements when you need maximum “roll-a-bility.”
TiteWeld® satisfies both ADA comfort requirements for wheel chairs and walking pedestrians.
TiteWeld® is IN STOCK and ready to ship.
Panel Width Chart (in.) 7-TW-4 TiteWeld® Dimensions Are Out-to-Out of Bearing Bars**No. of Bars 2 3 4 5 6 7 8 9 10 11 12 13 14 15 163/16" Bars 5/8 1-1/16 1-1/2 1-15/16 2-3/8 2-13/16 3-1/4 3-11/16 4-1/8 4-9/16 5 5-7/16 5-7/8 6-5/16 6-3/4
No. of Bars 17 18 19 20 21 22 23 24 25 26 27 28 29 30 313/16" Bars 7-3/16 7-5/8 8-1/16 8-1/2 8-15/16 9-3/8 9-13/16 10-1/4 10-11/16 11-1/8 11-9/16 12 12-7/16 12-7/8 13-5/16
No. of Bars 32 33 34 35 36 37 38 39 40 41 42 43 44 45 463/16" Bars 13-3/4 14-3/16 14-5/8 15-1/16 15-1/2 15-15/16 16-3/8 16-13/16 17-1/4 17-11/16 18-1/8 18-9/16 19 19-7/16 19-7/8
No. of Bars 47 48 49 50 51 52 53 54 55 3/16" Bars 20-5/16 20-3/4 21-3/16 21-5/8 22-1/16 22-1/2 22-15/16 23-3/8 23-13/16
**Add 1/4" for extended cross bars. Deduct 1/16" for 1/8" bearing bars. Standard panel widths indicated in bold.
*Based on 27.429 bars/ft. of grating width. Bearing bars 7/16" c.c. Add .6 lbs./sq. ft. for 7-TW-2. 1/8" bearing bars available upon 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. The actual “Ped (pedestrian) Span” under this condi-tion is shown above for each size of grating. When serrated grating is specified, the depth of grating required for a specific load will be 1/4" greater than that shown in these tables. 3/4" x 3/16" serrated grating is NOT available.
IN STOCK!!
ADA Compliant
Wt.*Lbs.
Sq. Ft.
13.73
18.09
22.45
26.81
31.20
35.59
39.92
44.31
UDCDUDCDUDCDUDCDUDCDUDCDUDCDUDCD
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"1446.0991446.0792571.0742571.0604018.0604018.0485786.0505786.0407875.0437875.034
10286.037
10286.030
13018.033
13018.026
16072.030
16072.030
926.1551157.1241646.1162057.0932571.0933214.0743703.0784629.0625040.0676300.0536583.0588229.0478332.052
10414.041
10286.047
12857.037
643.223964.1791143.1681714.1341786.1342679.1072571.1123857.0893500.0965250.0774572.0846857.0675786.0748679.0607143.067
10714.054
472.304827.243840.2281469.1821312.1822296.1461889.1523306.1222571.1304500.1043359.1145878.0914251.1017439.0815248.0919184.073
362.398723.318643.2981286.2381004.2382009.1911446.1992893.1591969.1703938.1362571.1495143.1193255.1326509.1064018.1198036.095
286.503643.402508.3771143.302794.3021786.2411143.2512571.2011556.2163500.1722032.1894572.1512571.1685786.1343175.1517143.121
231.620579.497411.4651029.373643.3721607.298926.3102314.2481260.2663150.2131646.2334114.1862083.2705207.1662571.1866429.149
340.563935.451531.4501461.360765.3752104.3001041.3222864.2581360.2823740.2251721.2504734.2002125.2255844.180
286.671857.536446.5361339.429643.4471929.358875.3832625.3061143.3353429.2681446.2984339.2381786.2685357.215
380.6291236.503548.5251780.420746.4502423.360974.3933165.3151232.3504006.2801522.3154945.252
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 aretheoretical, and are based on a unit stress of 18,000 psi.
328.7301148.584472.6081653.487643.5212250.417840.4562939.3651063.4063719.3241312.3654592.292
251.9531004.762362.7951446.635492.6811969.545643.5962571.477814.5303255.4241004.4764018.381
Bar Size,Inches
3/4 x 3/16
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
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Light Duty Steel Design CriteriaThe tables of safe loads which follow have been computed using the following design parameters:
U = Uniform Load - lbs/ft2
C = Concentrated Load - lbs/ft of grating width
S = Section Modulus - in3/ft of grating width
I = Moment of Inertia - in4/ft of grating width
L = Simple Clear Span - feet
D = Deflection - inches
E = Modulus of Elasticity (30,000,000 psi)
F = Allowable Bending Stress (18,000 psi)
M = Bending Moment
Light Duty Welded Steel (W Series)
GRATING TYPES - LIGHT DUTY WELDED STEEL W SERIES
HOW TO SPECIFY:
1. Grating: Light Duty Welded SteelW Series.
2. Bearing Bars: Rectangular Bar on1-3/16" centers maximum. (Note:Other spacings may be specifiedat the discretion of the architect/engineer.)
3. Cross Bars: Electroforge welded atright angles to bearing bars at 4" centers maximum. (Note: 2" cross bar centers may be specified at the discretion of the architect/engineer.)
4. Surface: Plain. (Note: A serratedsurface may be specified formaximum skid resistance.)
5. Loading: Grating to carry apedestrian loading equal to 100# persquare foot over the required clearspan with deflection not to exceed1/4". (Note: Alternate loadingrequirements may be specified at thediscretion of the architect/engineer.)
6. Finish: Galvanized or manufacturer’sstandard black paint at the discretionof the architect/engineer.
7. Fabrication and Tolerances: Inaccordance with the NAAMM MetalBar Grating Manual.
For those areas requiring the corrosion resistance of stainless steel, Direct Metals stocks 1" x 3/16", 1-1/4" x 3/16" and1-1/2" x 3/16" 19-W-4 Type 304 stainlesssteel electroforge welded grating. Sincethe welding process discolors the stain-less surface, this grating is best suited forindustrial applications only and should notbe specified where cosmetic appearanceis important.
Serrated Surface
BAR GRATING
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BAR GRATING
Light Duty Welded Steel
0.316
0.158
1 x 3/16 57 7.04
0.329
0.206
0.493
0.308
61 5.961 - 1/4 x 1/8
1 - 1/4 x 3/16
0.474
1.599
1.974
1.263
0.967
0.711
0.355
1.798
2.467
1.263
0.846
0.533
67
70 7.041 - 1/2 x 1/8
77 10.251 - 1/2 x 3/16
87 11.871 - 3/4 x 3/16
96 13.482 x 3/16
105
113
15.08
16.70
2 - 1/4 x 3/16
2 - 1/2 x 3/16
8.64
0.105
3/4 x 3/16 46 5.43
0.178
0.067
51 4.881 x 1/80.211
UDCDUDCDUDCDUDCDUDCDUDCDUDCDUDCDUD CDUDCDUDCD
5330.099
5330.079
6320.075
6320.060
9470.074
9470.060
9870.060
9870.04814800.06014800.04814210.05014210.04021320.05021320.04029010.04329010.03437890.03737890.03047960.03347960.02659210.03059210.024
3410.155
4260.124
4040.116
5050.093
6060.116
7580.093
6320.093
7890.074
9470.09311840.074
9090.07811370.06213640.07817050.06218570.06723210.05324250.05830320.04730690.05238370.04137890.04747370.037
2370.224
3550.179
2810.168
4210.134
4210.168
6320.134
4390.134
6580.107
6580.134
9870.107
6320.112
9470.089
9470.11214210.08912890.09619340.07716840.08425260.06721320.07431970.06026320.06739470.054
1740.304
3050.244
2060.228
3610.183
3090.228
5410.182
3220.182
5640.146
4830.182
8460.146
4640.152
8120.122
6960.15212180.122
9470.13016580.10412370.11421650.09115660.10127410.08119330.09133830.073
1330.397
2660.317
1580.298
3160.239
2370.298
4740.239
2470.239
4930.191
3700.238
7400.191
3550.198
7110.159
5330.19910660.159
7250.17014510.136
9470.14918950.11911990.13223980.10614800.11929600.095
1250.378
2810.302
1870.377
4210.302
1950.302
4390.242
2920.301
6580.241
2810.252
6320.201
4210.251
9470.201
5730.21512890.172
7490.18916840.151
9470.16821320.13411700.15126320.121
1520.467
3790.372
1580.373
3950.298
2370.373
5920.298
2270.310
5680.248
3410.310
8530.248
4640.26611600.213
6060.23315160.186
7670.20719180.165
9470.18623680.149
1300.449
3590.361
1960.451
5380.360
1880.376
5170.300
2820.376
7750.301
3840.32210550.257
5010.28213780.225
6340.25017440.200
7830.22521530.180
1640.535
4930.429
1580.447
4740.358
2370.447
7110.358
3220.383
9670.306
4210.33512630.268
5330.29815990.238
6580.26819740.215
2020.525
6560.420
2750.450
8930.360
3590.39411660.315
4540.35014760.280
5610.31518220.252
2370.522
8290.417
3090.45610830.365
3920.40613700.324
4830.36516920.292
1810.680
7250.545
2370.596
9470.477
3000.53011990.424
3700.47714800.381
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 based on a unit stress of 18,000 psi.
Clear Span
*Based on 10.105 bars/ft. of grating width. Bearing bars 1-3/16" c.c. Add .6 lbs./sq. ft. for 19-SGCS-2. Note: Grating for spans to the left of the heavy line have a deflection less than 1/4" for uniformloads 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. The actual “Ped (pedestrian) Span” underthis condition is shown above for each size of grating. When serrated grating is specified, the depth of grating required for a specific load will be 1/4" greater than that shown in these tables. 3/4" x 3/16" serrated grating is NOT available.
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Heavy Duty Welded Steel (W Series)
SLIP-NOT Grip Grate Safety Surface Available
Plain Surface Serrated Surface
Heavy duty welded grating ranges in size from 1-1/4" X 1/4" bearing bars through6" x 1/2" (7" bearing bars available byinquiry). Standard bearing bar spacings are 15/16", 13/16",1-3/8", 1-7/8" and 2-3/8"center-to-center. See pages 25 and 27 for standard cross bar design. Rectangular cross bars are also available. Standard cross bar spacings are 4" or 2"center-to-center.
HOW TO SPECIFY:
1. Grating: Heavy Duty Welded SteelW Series by Direct Metals orapproved equal.
2. Bearing Bars: To be (size) rectangularbar spaced (as specified) inches center-to-center. (Note: Bearing bar size selection and spacing must be coordinated with the load and span conditions.)
3. Cross Bars: To be (size) spaced 4"center-to-center and welded at rightangles to bearing bars with one filletat each bearing bar/cross bar inter-
section. (Note: 2" cross bar spac- ing may be specified for maximum
lateral stability.)
4. Surface: Plain. (Note: A serratedsurface may be specified formaximum skid resistance.)
5. Loading: Shall be specified by thearchitect/engineer in terms of uniformload/sq. ft., concentrated load/ft. ofgrating width or by AASHTO wheelload designation. Loading, bearingbar size, bearing bar spacing andspan conditions must be coordinated.
6. Finish: Galvanized or manufacturer’sstandard black paint at the discretionof the architect/engineer.
7. Fabrication and Tolerances: Inaccordance with the NAAMM HeavyDuty Metal Bar Grating Manual.
GRATING TYPESHEAVY DUTY WELDED STEEL W SERIES
For traffic areas running perpendicular to the span direction, supplementary bottom cross bars may be specified to provide added lateral stability and impact resistance.
BAR GRATING
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Heavy Duty Welded Steel 19-W-4/19-W-2
1 x 1/41 x 3/8
1 - 1/4 x 1/41 - 1/4 x 3/81 - 1/2 x 1/41 - 1/2 x 5/161 - 1/2 x 3/81 - 3/4 x 1/41 - 3/4 x 3/8
2 x 1/42 x 5/162 x 3/8
2 - 1/4 x 1/42 - 1/4 x 3/82 - 1/2 x 1/42 - 1/2 x 5/162 - 1/2 x 3/8
3 x 1/43 x 5/163 x 3/83 x 1/2
3 - 1/2 x 1/43 - 1/2 x 3/83 - 1/2 x 1/2
4 x 1/44 x 5/164 x 3/84 x 1/2
4 - 1/2 x 1/44 - 1/2 x 3/84 - 1/2 x 1/2
5 x 1/45 x 5/165 x 3/85 x 1/2
5 - 1/2 x 1/45 - 1/2 x 3/85 - 1/2 x 1/2
6 x 1/46 x 5/166 x 3/86 x 1/2
9.7114.0111.8717.2314.0117.2320.4616.1623.6718.3022.6026.8920.4630.1222.6027.9633.3428.3234.7641.2054.0932.6147.6562.6736.9145.5054.0971.2641.2060.5379.8545.5056.2466.9788.4449.7973.4297.0354.0966.9779.85
105.62
0.4210.6320.6580.9870.9471.1841.4211.2891.9341.6842.1052.5262.1323.1972.6323.2893.9473.7894.7375.6847.5795.1587.737
10.3166.7378.421
10.10513.473
8.52612.78917.05210.52613.15815.78921.05212.73719.10525.47315.15818.94722.73630.315
0.2110.3160.4110.6170.7110.8881.0661.1281.6921.6842.1052.5262.3983.5973.2894.1124.9345.6847.1058.526
11.3689.026
13.53918.05213.47316.84220.21026.94719.18428.77638.36726.31532.89439.47352.63035.02552.53870.05145.47356.84168.20990.945
79101413161917252228332841344250496067*78*6685*9685*95*96969696969696969696969696969696
688101011131217151821182622273130374457405875*51637591*6494*967896969694969696969696
799121113141418161922192622273130364355395672*50617288*6190967592969689969696969696
91112141416181721202326233127313635424961*456476*577080*92*7095*968596969696969696969696
Bar Size,Inches
Wt.**Lbs.
Sq. FtSx**, in3
Ft. Widthlx**, in4
Ft. Width
Section Properties Maximum Safe Clear Span, Inches-Partially Distributed Load
1 Ton 3 Ton 5 Ton H15/H20
BBSize
Thru2 - 1/2"
4"cc2"cc
72%65%
67%61%
62%56%
74%70%
69%65%
64%60%
54%51%
4"cc2"cc
3" to 6"
CBCtrs 1/4" 5/16" 3/8" 1/2"
Bearing Bar Thickness% Open Area*
*Span limited to 1/400 of span = Deflection. ** Based on 10.105 bars/ft of grating width. Bearing bars 1-3/16" c.c. When serrated grating is specified, the depth of grating required for a specific load will be 1/4" greater than that shown in these tables. Weights shown are for 4" cross bar centers. Add 1.13 lbs/sq. ft. (3/8" Dia.) or 2.55 lbs/sq. ft. (1" x 1/4") for 2" cross bar centers. Cross bars are determined based on project applications and bearing bar height.
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BAR GRATING
Heavy Duty Welded Steel - 19 Space
1 x 1/41 x 3/8
1 - 1/4 x 1/41 - 1/4 x 3/81 - 1/2 x 1/4
1 - 1/2 x 5/161 - 1/2 x 3/81 - 3/4 x 1/41 - 3/4 x 3/8
2 x 1/42 x 5/162 x 3/8
2 - 1/4 x 1/42 - 1/4 x 3/82 - 1/2 x 1/4
2 - 1/2 x 5/162 - 1/2 x 3/8
3 x 1/43 x 5/163 x 3/83 x 1/2
3 - 1/2 x 1/43 - 1/2 x 3/83 - 1/2 x 1/2
4 x 1/44 x 5/164 x 3/84 x 1/2
4 - 1/2 x 1/44 - 1/2 x 3/84 - 1/2 x 1/2
5 x 1/45 x 5/165 x 3/85 x 1/2
5 - 1/2 x 1/45 - 1/2 x 3/85 - 1/2 x 1/2
6 x 1/46 x 5/166 x 3/86 x 1/2
Bar Size,Inches
Loads are theoretical, and are based on a unit stress of 20,000 psi.
1'- 0" 1'- 6" 2'- 0" 2'- 6" 3'- 0" 3'- 6" 4'- 0" 4'- 6" 5'- 0" 5'- 6" 6'- 0" 8'- 0"7'- 0"
BBSize
Thru2 - 1/2"
4"cc2"cc
72%65%
67%61%
62%56%
74%70%
69%65%
64%60%
54%51%
4"cc2"cc
3" to 6"
CBCtrs 1/4" 5/16" 3/8" 1/2"
Bearing Bar Thickness% Open Area*
Maximum Safe Concentrated Load*, Lbs. - Clear Span
28074213438765806313789394738593
128931122714033168401421321313175472192726313252603158037893505273438751580
18712809292443874209526263165729859674849356
112279476
1420911698146181754216840210532526233684229243438745849299423742744911598803789356840
140321072193329031573947473742976447561370178420
106578773
10963131571263015790189472526317193257903438722457280703368344910284204263056840350874386052630
1123168517552632252531573789343751574491561367365685852570198771
105251010412632151572021113755206322750917965224562694735928227363410445472280693508842104561393396550947
93614041462219321042631315828644298374246785613473871045849730987718420
1052712631168421146217193229241497118713224562994018947284203789323391292403508746782283044245656607336844210450524
802120412531880180422552707245536843208401048114061609050136265751872179023
10827144369825
1473719650128321604019248256631624024360324802005025063300744009924261363904852028872360904330757743
109716451578197323682148322328073508421035535328438754826578631578959473
126328597
1289517193112281403516842224551421021315284201754321930263153508721228318424245525263315783789350525
1403175421051910286524953119374231594736389948735847561370188421
112287641
11462152839981
1247614970199601263118947252621559419493233913118818870283043773822456280703368344911
1719257922452807336828434263350943855263505263167579
101056877
10316137558983
1122813473179641136817052227361403517544210522806916983254733396420211252633031540420
25843875319039874784459357426890918762529378
125048166
1020712248163311033515502206691275915949191382551815439231583087618373229662755936745
292436544386421052636316842157318597
1146274869357
11228149709473
14210189471169614620175432339114152212282830316842210522526233683
491273699825641680209624
128318120
12180162401002512531150372005012130181952426014436180452165328871
710510658142108772
10965131581754310614159212122812632157891894725263
*Based on 10.105 bars / ft. of grating width. Bearing bars 1-1/16" c.c. Note: When serrated grating is specified, the depth of grating required for a specificload will be 1/4" greater than that shown in these tables
19-W-4 & 19-W-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" Bars 1-7/16 2-5/8 3-13/16 5 6-3/16 7-3/8 8-9/16 9-3/4 10-15/16 12-1/8 13-5/16 14-1/2 15-11/16 16-7/8 18-1/16
5/16" Bars 1-1/2 2-11/16 3-7/8 5-1/16 6-1/4 7-7/16 8-5/8 9-13/16 11 12-3/16 13-3/8 14-9/16 15-3/4 16-15/16 18-1/83/8" Bars 1-9/16 2-3/4 3-15/16 5-1/8 6-5/16 7-1/2 8-11/16 9-7/8 11-1/16 12-1/4 13-7/16 14-5/8 15-13/16 17 18-3/161/2" Bars 1-11/16 2-7/8 4-1/16 5-1/4 6-7/16 7-5/8 8-13/16 10 11-3/16 12-3/8 13-9/16 14-3/4 15-15/16 17-1/8 18-5/16
No. of Bars 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1/4" Bars 19-1/4 20-7/16 21-5/8 22-13/16 24 25-3/16 26-3/8 27-9/16 28-3/4 29-15/16 31-1/8 32-5/16 33-1/2 34-11/16 35-7/8
5/16" Bars 19-5/16 20-1/2 21-11/16 22-7/8 24-1/16 25-1/4 26-7/16 27-5/8 28-13/16 30 31-3/16 32-3/8 33-9/16 34-3/4 35-15/163/8" Bars 19-3/8 20-9/16 21-3/4 22-15/16 24-1/8 25-5/16 26-1/2 27-11/16 28-7/8 30-1/16 31-1/4 32-7/16 33-5/8 34-13/16 361/2" Bars 19-1/2 20-11/16 21-7/8 23-1/16 24-1/4 25-7/16 26-5/8 27-13/16 29 30-3/16 31-3/8 32-9/16 33-3/4 34-15/16 36-1/8
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BAR GRATING
Heavy Duty Welded Steel 22-W-4/22-W-2
1 x 1/41 x 3/8
1 - 1/4 x 1/41 - 1/4 x 3/81 - 1/2 x 1/41 - 1/2 x 5/161 - 1/2 x 3/81 - 3/4 x 1/41 - 3/4 x 3/8
2 x 1/42 x 5/162 x 3/8
2 - 1/4 x 1/42 - 1/4 x 3/82 - 1/2 x 1/42 - 1/2 x 5/162 - 1/2 x 3/8
3 x 1/43 x 5/163 x 3/83 x 1/2
3 - 1/2 x 1/43 - 1/2 x 3/83 - 1/2 x 1/2
4 x 1/44 x 5/164 x 3/84 x 1/2
4 - 1/2 x 1/44 - 1/2 x 3/84 - 1/2 x 1/2
5 x 1/45 x 5/165 x 3/85 x 1/2
5 - 1/2 x 1/45 - 1/2 x 3/85 - 1/2 x 1/2
6 x 1/46 x 5/166 x 3/86 x 1/2
8.5412.2510.4015.0412.2515.0417.8214.1120.5915.9619.6723.3817.8226.1619.6724.3028.9524.8030.3735.9347.0628.5141.5054.4832.2239.6447.0661.8935.9352.6369.3139.6448.9258.1876.7343.3563.7584.1547.0658.1869.3191.57
0.3640.5450.5680.8520.8181.0231.2271.1141.6701.4551.8182.1821.8412.7612.2732.8413.4093.2734.0914.9096.5454.4546.6828.9095.8187.2738.727
11.6367.363
11.04514.727
9.09111.36313.63618.18111.00016.49921.99913.09116.36319.63626.181
0.1820.2730.3550.5330.6140.7670.9200.9741.4621.4551.8182.1822.0713.1062.8413.5514.2614.9096.1367.3639.8187.795
11.69315.59011.63614.54517.45423.27216.56824.85133.13522.72728.40834.09045.45330.24945.37460.49839.27249.08958.90778.543
6991312151816232125302638313946455564*74*6081*94*7891*96969696969696969696969696969696
677991112111514171917242024282733405236536946576886*5885967188969685969696969696
79911111213131615172018242024282733385035506645546483*5580966782969680969694969696
91111131315161520182124212824293332384457*415871*51627387*6389*967692969690969696969696
Bar Size,Inches
Wt.**Lbs.
Sq. FtSx**, in3
Ft. Widthlx**, in4
Ft. Width
Section Properties Maximum Safe Clear Span, Inches-Partially Distributed Load
1 Ton 3 Ton 5 Ton H15/H20
BBSize
Thru2 - 1/2"
4"cc2"cc
75%68%
70%64%
66%60%
77%72%
72%68%
68%64%
60%56%
4"cc2"cc
3" to 6"
CBCtrs 1/4" 5/16" 3/8" 1/2"
Bearing Bar Thickness% Open Area*
*Span limited to 1/400 of span = Deflection. ** Based on 8.727 bars/ft of grating width. Bearing bars 1-3/8" c.c. When serrated grating is specified, the depth of grating required for a specific load will be 1/4" greater than that shown in these tables. Weights shown are for 4" cross bar centers. Add 1.13 lbs/sq. ft. (3/8" Dia.) or 2.55 lbs/sq. ft. (1" x 1/4") for 2" cross bar centers. Cross bars aredetermined based on project applications and bearing bar height.
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BAR GRATING
Heavy Duty Welded Steel - 22 Space
24273633378756805453682081807427
111339700
1212014547122731840715153189402272721820272733272743633296934454759393387874848758180
1 x 1/41 x 3/8
1 - 1/4 x 1/41 - 1/4 x 3/81 - 1/2 x 1/4
1 - 1/2 x 5/161 - 1/2 x 3/81 - 3/4 x 1/41 - 3/4 x 3/8
2 x 1/42 x 5/162 x 3/8
2 - 1/4 x 1/42 - 1/4 x 3/82 - 1/2 x 1/4
2 - 1/2 x 5/162 - 1/2 x 3/8
3 x 1/43 x 5/163 x 3/83 x 1/2
3 - 1/2 x 1/43 - 1/2 x 3/83 - 1/2 x 1/2
4 x 1/44 x 5/164 x 3/84 x 1/2
4 - 1/2 x 1/44 - 1/2 x 3/84 - 1/2 x 1/2
5 x 1/45 x 5/165 x 3/85 x 1/2
5 - 1/2 x 1/45 - 1/2 x 3/85 - 1/2 x 1/2
6 x 1/46 x 5/166 x 3/86 x 1/2
1618242225243787363645475453495174226467808096988182
1227110102126271515114547181822181829089197962969839596258583232438787517163272449089
1213181718932840272734104090371355674850606072736137920375779470
113631091013637163632181714847222732969719393242432909038787245433681749090303033787745453
97114531515227221812728327229714453388048485819490973636061757690918728
1090913091174531187717819237571551519395232723102919635294533927224243303013636348483293334399758664349094363552363
809121112621893181822732727247637113233404048494091613650516313757672739091
10909145449898
1484919798129291616219393258581636224544327272020225251303024040224444366644888729091363624363658180
6931038108216231558194923372122318127713463415635075259433054116493623477929350
124678484
1272816970110821385316623221641402521038280511731621644259733463020952314274190324935311683740249869
94714201363170520451857278324253030363730684602378847355682545568188182
109087423
11137148489697
1212214545193931227218404245451515218938227273030218333274983666521818272723272743635
1212151618181650247421562693323327274090336742095050484960617273969665999899
131998619
1077512929172391090816363218181346816834202012693516296244433259119394242412909038787
1485222719402424290924553681303137884545436454556545872759398909
1187977579697
11636155159817
14727196361212115151181812424114667219992933217455218172618134908
22323347275534444132396749595950793353998099
1079970528816
10578141048925
13388178511101913773165282203813333199992666515868198342380131735
2526315737883637454654547272494974249899646480819697
129298181
12272163631010112626151512020112222183322444314546181812181829090
424263648485554169278311
110827012
10519140268658
10822129871731510476157132095112468155841870124934
61369204
1227375769469
11363151519167
137491833310909136361636321818
Bar Size,Inches
Maximum Safe Concentrated Load*, Lbs. - Clear Span
Loads are theoretical, and are based on a unit stress of 20,000 psi.
1'- 0" 1'- 6" 2'- 0" 2'- 6" 3'- 0" 3'- 6" 4'- 0" 4'- 6" 5'- 0" 5'- 6" 6'- 0" 8'- 0"7'- 0"
BBSize
Thru2 - 1/2"
4"cc2"cc
75%68%
70%64%
66%60%
77%72%
72%68%
68%64%
60%56%
4"cc2"cc
3" to 6"
CBCtrs 1/4" 5/16" 3/8" 1/2"
Bearing Bar Thickness% Open Area*
* Based on 8.727 bars/ft of grating width. Bearing bars 1-3/8" c.c. Note: When serrated grating is specified, the depth of grating required for a specific load will be 1/4" greater than that shown in these tables.
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BAR GRATING
Stair Treads
STANDARD TREAD WIDTHS AND END PLATE DIMENSIONS
*Table of widths based on 3/16" thick bearing bars and standard bar spacing 1-3/16" cc (1-1/8" face-to-face for riveted grating.)
SUGGESTED BEARING BAR SIZES*
*Maximum tread length based on 400-lb. concentrated load on nosing and 4 bearing bars at center of tread length.NOTE: Since a serrated connecting bar does not reduce the strength of the grating, R and AR series treads may always be selected from the “Plain” column.
NOTE: DIM, B = 2-1/4"for ALL aluminum treads.
NOTE: Refer to drawings above for A and B dimensions5 6-3/16 6-1/4 6-11/16 6-3/8 2-1/2 1-3/4 2-1/4
6 7-3/8 7-7/16 8 7-1/4 4-1/2 1-3/4 2-1/47 8-9/16 8-5/8 9-5/16 8-3/4 4-1/2 1-3/4 2-1/4
8 9-3/4 9-13/16 10-5/8 9-15/16 7 1-3/4 2-1/4
9 10-15/16 11 11-15/16 11-1/8 7 1-3/4 2-1/4
10 12-1/8 12-3/16 13-1/4 12-3/8 7 1-3/4 2-1/4
W, SG, SGF SGI R, AR Plank Dimension 1 1-1/2Series Series Series Series A 1-1/4 1-3/4
Dimension BEnd Plate Dimensions
Aluminum Treads
Width (includes nosing*)Number of
Bearing Bars
1" x 3/16" 2'-4" 2'-2" 1" I-Bar / Plank 2'-6" 3/4" x 3/16" 2'-4" 1'-11"1-1/4" x 3/16" 2'-10" 2'-7" 1-1/4" I-Bar / Plank 3'-0" 1" x 3/16" 3'-5" 2'-10"1-1/2" x 3/16" 3'-6" 3'-2" 1-1/2" I-Bar / Plank 3'-6" 1-1/4" x 3/16" 4'-8" 4'-2"1-3/4" x 3/16" 4'-3" 3'-10" 1-3/4" I-Bar / Plank 4'-5" 1-1/2" x 3/16" 5'-6" 5'-3"
Steel Treads
Max. Tread Length*
PlainW, R
SeriesSGI Series
Plank SeriesMaximum Tread
Length*SGF, SG, AR
Series SerratedMax. Tread Length*Plain Serrated
STAIR TREAD DETAILS
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BAR GRATING
Anchoring DevicesSADDLE CLIPA special bent-clip type fastener for removable bar grating panels available in aluminum, stainless steel, and galvanized steel. Clips only are supplied by the grating manufacturer. Other fasteningaccessories to be provided byothers. (Note: Cross bars may need to be snipped in the field to facili-tate placement of saddle clips.)
ANCHOR BLOCKAnchor blocks of 1/4" or 3/16" thick aluminum, or steel may be shop welded by the gratingmanufacturer and used to fasten permanent or removable grating panels. Anchor blocks arerecessed thus offering a trip-free surface.
PLANK CLIPA special friction fastener used in conjunction with plank grating and embedded grating frames. When plank is banded, clips are installed by the manufacturer.
COUNTERSUNK LANDFor close-mesh aluminum grating (7/16" bearing bar cen-ters) a countersunk land may be drilled by the grating manufac-turer for use with a 1/4" diameter TEK screw by others.
GRATING CLAMPA special friction fastener available in aluminum, stainless steel, and galvanized steel used in conjunction with bar grating and embedded grating frames. (Note: Cross bars may need to be snipped in the field to facilitate placement of grating clamps.)
Z CLIPThe most versatile clip anchor available is the Z Clip. These clips are especially helpful in holding down riveted grating. Z Clips are manufactured from stainless steel, and are available in 1" (1" and1-1/4" grating) 1-1/2" (1-1/2" and1-3/4" grating) and 2" (2", 2-1/4"and 2-1/2" grating) with a pre-punched hole to accept a 1/4" boltor TEK screw by others.
PLANK LUGA plank lug inserted and tack welded between flanges can serve as an anchor block for plank grating. TEK screw fastener by others.
TACK WELDA positive method for anchoring all permanently installed grating.
EXAMPLES OF FABRICATIONS
