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UNITED INTERLOCK GRATINGUnited Interlock PlankGrating System fromUnistrut, commonlyknown as InterlockGrating, fills a multitudeof needs includingflooring and walkways,mezzanines, stair treads,maintenance and stagingplatforms, scaffoldingplanks, architectural wall coverings and more. UnitedInterlock Grating Systems meets your needs forstrength, durability, safety and aesthetics.Customers choose United Interlock Grating Systems formany reasons: Cost-effectiveness Easy-to-install product Quality assurance that comes fromextensive load testing Large inventories and fast delivery Strong design look of our plank gratingIn addition to supplying the grating, Unistrut offersturnkey service for your project. This includesengineering, support structures, and installation.United Interlock Grating Applications include: Architectural wall coverings Catwalks, walkways and pedestrian ramps Maintenance and inspection walkways Ventilation covers for tanks and wells Mining and quarry tower decking Pumping and drilling platforms Subflooring Mezzanines Shelving StairsEase of Installation .222Plank Grating .223 - 224Accessories .225 - 227Heavy Duty Stair Treads .228Design and Testing .229Plank Loads and Deflections .230 - 235Architectural Specifications.236Architectural ApplicationsInterlock Grating provides a functional andaesthetically appealing look to architecturalapplications. Aluminum gratings resist corrosionto give walls, ceilings, ledges, trim, flooring, andspecialty projects a clean, lasting, high-tech look.Interlocking plank grating works especially well inintensive-use areas. In addition to its durability, it iseasy to clean and does not reflect sound like a solidsurface.Architects have often selected InterlockGrating because it protects lights,insulation support columns, wiring, andother fixtures. And, the panels allowauthorized personnel to access thefixtures.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com221
Contractors have reported installed cost savings of up to 75% with InterlockGrating. Many factors combine to make installation quick and easy:1) The lightweight grating is easy to handle. One person can carry a 24' plank.2) Interlock Grating is easy to install with a minimal number of laborers.3) Interlock Grating’s light weight reduces shipping costs.4) The planks interlock with positive friction, eliminating costlywelding and bolting.5) Field modifications are easy.Interlock Grating can be cutto size, shape, and angle at thejobsite.6) Interlock Grating requires fewersupport structures.Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP ¼ 6\VWHP ¼ 6\VWHP ¼ 6\VWHPEase of InstallationProject ServicesUnited Interlock distribution network provideslocal support for complete project administration asdesired or required by our customers. This includesengineering, design, and installation of all the UnitedInterlock Grating Systems.Our engineers can design a grating system whichwill safely span the area using existing supports atyour facility, perform load and deflection tests for222unusual loading conditions,advise you of the mosteconomical placement ofgrating and supports, andprovide fabrication and erectiondrawings.We can complete your projectby coordinating all aspects ofinstallation. Our local distribution network cancoordinate shipping and staging of materials, provideand supervise local installation crews, and arrange forspecial erection equipment services.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Interlock Grating FeaturesMaximizes performance and safety Anti-skid surface provides 360 of slip resistance Superior ultimate-load performance tested inaccordance with AISI standards All sections made from structural-grade steel Roll-formed design provides superior strength Optional heel-toe side and end plates Open design prevents build-up of water, grease,oil and small debrisAnd gives you complete project versatility. 6", 9" and 12" plank widths allow design in 3"increments Standard lengths of 20' and 24', and speciallengths up to 30', provide excellent designflexibility Choice of smooth punched, anti-skid punched orsolid unpunched surfaces Three leg heights, and two material gaugesmeet a wide range of load, space and budgetrequirementsUnited Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com223 ¼ 6\VWHP¼ 6\VWHP Punched Interlock Grating has an open area of 42%for 9" grating and 35% for 6" grating. This preventsdirt, debris, ice, and snow from building up on thesurface and allows light and air to pass through.United Interlock steel grating is made from pregalvanized steel which conforms to a G-90 thicknessdesignation per ASTM A653. The aluminum grating ismade from type 5052 aluminum with a thickness of0.080".Unpunched smooth surface grating is also availablefor special applications.United Interlock Grating Systems are strong,economical, versatile, and easy to specify.Variety of choices 6" and 9" standard-duty width 12" light-duty width 14 gauge and 18 gauge 11 2", 21 2", and 4" leg heights 20' and 24' stock lengths Anti-skid, slotted-smooth punched surfaces andsolid unpunched surface Double male and male-female leg shapes Steel (6", 9" or 12") and aluminum (6"or 9")Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHPUnited Interlock Grating strength-to-weight ratioallows it to withstand substantial loads while beingeasy to handle. The male-female legs of the rollformed grating interlock securely, and double-malelegs provide a safe finished edge for end planks.Two standard surfaces are available: slotted-smoothand anti-skid. Anti-skid is the ideal choice when safewalking conditions are important. Die-formed teethin the transverse ribs give you 360 of shoe-grippingtraction even when the grating is wet, oily, muddy, oricy. ¼ 6\VWHPPlank Grating
81,7(' ,17(5/2&. *5 7,1* 6 67(06³ 1' 4 3 4" or 7 1 2"9'' or 6''B¼ 6\VWHP Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP31 ¼ 6\VWHP ¼ 6\VWHPGrating Planks 4"1 8"Nom. 2"LegAnti-skid Rib9" Wide Planks (14 Ga, 18 Ga, 0.080 Aluminum)LegLegFinish Slotted, AntiUnWt.Wt.2Height Shape Material Smooth Skid punched Lbs./Ft Lbs./Ft* * * DM3.54.7PG* * * 14Ga.MF3.54.711 2"* * * DM2.33.1PG* * * 18 Ga.MF2.33.1* * * DM4.05.3PG* * * 14 Ga.MF4.05.3* * * DM2.73.6PG21 2"* * * 18 Ga.MF2.73.6* * * DM1.52.0AL0.080" * * * MF1.52.0* * * DM4.86.4PG* * * 14 Ga.MF4.86.44"* * * DM3.24.3PG* * * 18 Ga.MF3.24.3Note:3 4"3 4"Anti-Skid Surface Shown6" Wide Planks (14 Ga, 18 Ga, 0.080 Aluminum)LegLegFinish Slotted, AntiUnWt.Wt.2Height Shape Material Smooth Skid punched Lbs./Ft Lbs./Ft* * * DM2.75.4PG* * * 14Ga.MF2.75.411 2"* * * DM1.83.6PG18 Ga. * * * MF1.83.6* * * DM3.46.8PG14 Ga. * * * MF3.46.8* * * DM2.24.4PG21 2"18 Ga. * * * MF2.24.4* * * DM1.22.3AL0.080" * * * MF1.22.3* * * DM4.28.4PG14 Ga. * * * MF4.28.44"* * * DM2.85.6PG18 Ga. G62381 G62382 G62383MF2.85.6Standard grating lengths are 20' or 24'; DM–Double Male, MF–Male-FemaleUnpunched smooth surface grating is also available for special applications. Contact Unistrut for more information.81,7(' ,17(5/2&. *5 7,1* 6 67(06³ 101 2" "343 4"12''18 gauge21 2"[MF] Male-Female Leg12''18 gauge21 2"[DM] Double Male Leg12" Wide Planks, 18 GaugeLegHeight21 2"224LegShapeDMMFFinishMaterialPG18 GaugeSlotted,Smooth* * Anti-SkidG 11282G 12282For Light Traffic ApplicationsIdeal for mezzanines and other large-area applications, extra-wide 12" interlocking plank gratingis designed to simplify installation and reduce thecost of mezzanines, flooring, decking, staging platforms, Roofwalks and similar applications. With a43% open area, it allows water, light and air to passthrough.With its extra width, Unistrut 12" wide plank gratingcovers more area with fewer planks, lowering installation costs. Its high strength-to-weight ratio—18gauge, 21 2" leg height—makes it ideal for coveringlarge, light-traffic areas. Its snap-together friction fitmake it easy to install, with no welding or boltingrequired.Made of pre-galvanized steel, it’s maintenance-freeand long lasting. Specifiers can choose a smooth oranti-skid surface to meet a wide variety of application needs.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Accessories ¼ 6\VWHP),//(5 3 1(/Filler Panel ¼ 6\VWHPPlank'HVFULSWLRQ :LGH [ » /HJ HLJKW* 3* :LGH [ » /HJ HLJKW* 3* :LGH [ /HJ HLJKW 3DUW 1R * 3*¼ 6\VWHPBeam ClipIndex Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHPProvided in standard lengths of 10' and 12'.& 55,(5 3/ 7(Plank3DUW 1R 'HVFULSWLRQ* 3* JD IRU ZLGH KHDY\ GXW\ VWDLU WUHDGV » KROH DQG » [ » VORW* 3* JD IRU » ZLGH VWDLU WUHDGV» KROH DQG » [ » VORW* 3* JD IRU ZLGH VWDLU WUHDGV » KROH DQG » [ » VORWCarrier PlateProvides easy attachment of stair treads to support structures and stringers. ((/ 72( 6,'( 3/ 7(6 ² » 1' (,* 76Side PlatePlank3DUW 1R * 3*'HVFULSWLRQ14 ga. x 61 2" high x 12' long* 3*14 ga. x 8" high x 12' longForms a curb along grating length that defines a structure’s sideedge, and helps contain loose objects.*Part numbers shown are for galvanized. Most accessories are also available in aluminum.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com225
((/ 72( (1' 3/ 7(6 ² » 1' (,* 76End PlateIndex Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP ¼ 6\VWHP ¼ 6\VWHP ¼ 6\VWHPAccessoriesPlank3DUW 1R 'HVFULSWLRQ* 3* JD [ » KLJK [ ORQJ* 3* JD [ KLJK [ ORQJForms a curb along grating ends that defines a structure’s edge,and helps contains loose objects. 2/' '2:1 &/,33DUW 1R 'HVFULSWLRQ* 3* » OHJ KHLJKW* 3* » OHJ KHLJKW* 3* OHJ KHLJKW HoldDownClipPlankRibsPlankA 16 gauge attachment for fastening grating to support structurebelow. Attaches through top side of grating.Self-Drilling,Self-TappingScrew -µ %2/7 187 /2&. : 6 (53DUW 1R * (*'HVFULSWLRQ 16" x 21 2"Attachment for fastening panels to supportingmembers from underside of grating.Plank5“J” Bolt*Part numbers shown are for galvanized. Most accessories are also available in aluminum.226United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Accessories3DUW 1R * (* ¼ 6\VWHP*5 7,1* %( 0 &/ 03Plank'HVFULSWLRQBeam clamp ¼ 6\VWHPAttaches grating to structural I-beams.Requires no welding or drilling.¼ 6\VWHPGratingBeamClamp /,* 7 * 8*( %( 0 &/,3Beam ClipSelf-Drilling,Self-TappingScrew3DUW 1R * (*'HVFULSWLRQLight Gauge Beam ClipQuickly attaches grating to rack or shelving beams.Requires self-drilling, self-tapping screw—GHTS 012075 EG(not included).5(&(66(' : 6 (5RecessedWasherPlankRibsPlankBolt Attachedto SupportStructure3DUW 1R * (*'HVFULSWLRQ111 8" x 1 8" 12 gauge square washerHolds down grating from above. Eliminates trip points.*Part numbers shown are for galvanized. Most accessories are also available in aluminum.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com227Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHPPlank
Anyone who has slipped on a stairway canappreciate the safety of the anti-skid stair treads.Those who have tried to clean solid-surface stairscan appreciate our maintenance-free slotted design,which is both rust-resistant and self-cleaning.United’s stair treads make it easy for you to meetOSHA regulations. Factors to consider when selecting stair treads include loads, impact, frequency ofIndex Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP ¼ 6\VWHP ¼ 6\VWHP ¼ 6\VWHPHeavy-Duty Stair Treads9" Stair Tread14 gauge x 21 2" x 9"Completely galvanized,welded 10 gaugeend plates3DUW 1R /HQJWK LQ * 3* * 3* * 3* * 3* * 3* * 3* 9"1 1 4 "21 2 "41 2"1 1 4 "101 2" Stair Tread14 gauge x 21 2" x 101 2",Completely galvanized,welded 10 gauge end plates1use, and future use. Our 10 2" and 11" tread featuresa checker-plate nosing that strengthens the tread andincreases the width of the basic 9" tread.The failure loading data shown below indicatesultimate failure in pounds at various spans. A 31 2"diameter load was applied to the outer edge of a 9"wide stair tread at the center of the span. 6" widestair treads are also available.The stair treadscan also be usedwith Unistrut MetalFraming as shownhere to create a stairwith guide rail3DUW 1R /HQ LQ * 3* * 3* * 3* * 3* * 3* * 3* 101 4"21 2"11 4"2"71 4"7 8"11" Stair Treads14 gauge x 21 2" x 11" Completely galvanized, welded10-gauge end plates3DUW 1R /HQ LQ * 3* * 3* * 3* * 3* * 3* * 3* * 3*6011''11 4''2''21 2''71 2''11 4''Ultimate Failure Loading (pounds): Interlock Grating Stair Treads—Galvanized Steel—3 WidthsWidth9"101 3,400Distance Between Supports 7001,700Note: This table represents failure loads, not design loads. Designers should apply their own safety factor to these values todetermine maximum design loads.228United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Point (Concentrated) LoadsPoint loads should be disLOADtributed over a minimumof two transverse ribs,regardless of what sizeor gauge plank grating isutilized.Good design practice forpoint loading plank gratingemploys a “foot” plate atthe load point with a mini33mum dimension of 3" x 3".This plate will assure thatthe point load has beendistributed over the two transverse-rib minimum.Maximum point load per rib on 12" x 18 ga. steelplank grating is 185 lbs. As a result, through theuse of the required 3" x 3" “foot” plate, a maximumdesign load for the minimum-dimension foot plateis 370 lbs. Higher loads can be supported by thetransverse ribs. However, larger “foot” plates willthen be required to distribute the higher loads overadditional ribs.Light Traffic AreasFloor areas immediately adjacent to racks, shelves,conveyors, etc., are generally loaded by light traffic.Ends of aisles, single aisles, etc. are further examplesof light-traffic areas. These and similar areas are satisfactorily covered by economical 12" grating.Floor area beneath package conveyors or othermaterial-handling devices are typically subject tolittle or no loading. However, for safety reasons,these areas must be covered. The use of 12" plankgrating in these areas provides an economical floorcovering that can also be used as a load-bearing floorif requirements change.TestingUnistrut is dedicated to the research, developmentand testing of all our manufactured products. TheUnited Interlock Grating System has been tested inaccordance with section 6 of the American Iron andSteel Institute’s (AISI) Specifications for the Design ofCold Formed Steel Structural Members.Tests for allowable loads were performed on productrandomly selected from stock. These tests wererun on simple spans with no end restrictions, overa 2" end bearing. Concentrated loads were appliedacross the plank with a 3" bearing, while uniformloads were applied by stacking narrow strips of sheetsteel uniformly over the plank surface. Concentratedload tests for galvanized steel grating were run onall strength combinations for spans of 2', 3', 4', 5', 6',7', 8', 10', 12', 14', 16' and 18'. Uniform load tests forgalvanized steel were run on spans of 2', 3', 4', 6', 8'and 10'.Concentrated load results are the same for 6" and 9"wide planks.Allowable concentrated loads are found by reducing the ultimate load by 11 2 times the weight of thegrating and dividing the remaining load by two. Thisgives a safety factor of 2. Allowable uniform loadswere calculated by standard formulas from the resultsfound in the concentrated load tests.United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com229 ¼ 6\VWHP¼ 6\VWHPHigh-Traffic AreasMezzanines and aisles for stock storage are typicalhigh-traffic zones. As a result, grating in these areasmust have higher fatigue strengths. High fatiguestrengths are available utilizing narrow, high-strength6" or mid-range 9" width grating.Within these high traffic areas are floor sections thatreceive little or no traffic, but must be covered forsafety reasons. Innovative designers employ 12" grating in this situation. Combining 12" grating with othergrating widths and gauges lowers overall installedcosts for high-traffic applications. 12" Plank Grating is designed to provide an economical lightweight floor surface for light-traffic areas.Maintenance platforms, access ways and rooftopwalkway applications are examples of areas where12" grating is the best economical choice.Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHPDesign ConsiderationsDesigners must consider both uniform and concentrated loads. Design considerations are most criticalwhere loads are concentrated on a small area. As thearea of the application gets larger, the reactions approach those of uniform loads.Although a plank of grating may take a considerableallowable load, there may be more deflection thanthe designer feels is comfortable for foot traffic. Webelieve dividing the number of inches in the spanlength by 240 produces a reasonable deflection.Designing for overloads and future usage is generallya wise investment considering the costs of futuremaintenance, obsolescence and replacement, as wellas the danger of accidents. ¼ 6\VWHPDesign & Testing
LegHeight6" x 14 Gauge11 2"21 2"4"LegHeight6" x 18 Gauge11 2"21 2"4"6" Aluminum(0.080)Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP ¼ 6\VWHP ¼ 6\VWHP ¼ 6\VWHPLoads and Deflection – 6" PlanksLegHeightCodes8/2.5 3 3.5 4 4.5 8' &/ &' 8/ 7 8 9 10 12 14 8' &/ &' 8/ 8' &/ &' 2141901631351139683–––––CodesDistance Between Supports .510.881.07CodesDistance Between Supports –UL21 2"Distance Between Supports (Feet)55.566.5 2 Code Key: UL Uniform Load (pounds per square foot)UD Deflection under uniform load (Inches)CL Concentrated Load (pounds)CD Deflection under concentrated load (Inches)230United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Uniform Loads vs. Deflection – 6" Planks1300 ¼ 6\VWHP8006" x 11 2" x 14 Ga.2' (1232 Lbs.)1200Span (Max Uniform Load - Lbs.)Span (Max Uniform Load - Lbs.)11002.5' (548 Lbs.)70010009005003.5' (281 Lbs.)4005' (104 Lbs.)3004.5' (204 Lbs.)2002.5' (788 Lbs.)8007006003' (548 Lbs.)5003.5' (402 Lbs.)4005.5' (78 Lbs.)1006' (86 Lbs.)6.5' (68 Lbs.)1007' (38 Lbs.)7' (54 0.050.15DEFLECTION (Inches)260024000.250.300.400.35DEFLECTION (Inches)6" x 21 2" x 18 Ga.2' (2472 Lbs.)0.20 06" x 21 2" x 14 Ga.5200Span (Max Uniform Load - Lbs.)2' (4886 Lbs.)480022004400200040001800Span (Max Uniform Load - Lbs.)36002.5' (1664 Lbs.)1600LOAD (Pounds)LOAD (Pounds)5.5' (113 Lbs.)4' (204 Lbs.)2006.5' (48 Lbs.)5' (100 Lbs.)4.5' (293 Lbs.)3006' (60 Lbs.)4' (144 Lbs.) ¼ 6\VWHP3' (380 Lbs.)LOAD (Pounds)LOAD (Pounds)60014003' (1220 Lbs.)12003.5' (881 Lbs.)4' (663 Lbs.)10004.5' (516 Lbs.)5' (414 Lbs.)5.5' (342 Lbs.)6' (284 Lbs.)6.5' (237 Lbs.) 8' (164 Lbs.) 10' (102 Lbs.)12' (66 Lbs.)7' (197 Lbs.)9' (134 Lbs.)14' (44 Lbs.)8006004002002.5' (3296 Lbs.)320028003' (2150 Lbs.)240020003.5' (1601 Lbs.)16004' (1257 Lbs.)5' (734 Lbs.)5.5' (597 Lbs.)6' (501 Lbs.)6.5' (431 Lbs.) 8' (263 Lbs.)7' (369 Lbs.)9' (204 Lbs.)10' (150 Lbs.) 12' (84 Lbs.)14' (47 Lbs.)4.5' (924 Lbs.)1200800400000.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.60.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6DEFLECTION (Inches)DEFLECTION (Inches)2' (3296 Lbs.)32006" x 4" x 18 Ga.5200Span (Max Uniform Load - Lbs.)30002' (5261 Lbs.)6" x 4" x 14 Ga.Span (Max Uniform Load - Lbs.)4800280044002.5' (2544 Lbs.)260040002400180016003.5' (1520 Lbs.)14004' (1179 Lbs.)12005' (744 Lbs.)5.5' (626 Lbs.)6' (522 Lbs.)6.5' (449 Lbs.)7' (402 Lbs.)4.5' (947 Lbs.)10008006000.30.40.50.624004.5' (1520 Lbs.)5' (1307 Lbs.)5.5' (1019 Lbs.)6' (858 Lbs.)6.5' (738 Lbs.)7' (648 Lbs.)8' (314 Lbs.)9' (249 Lbs.)120010' (191 Lbs.)12' (147 Lbs.)14' (101 Lbs.)00.23.5' (2321 Lbs.)4' (1755 Lbs.)280016002000.13' (3147 Lbs.)320020004000.02.5' (4016 Lbs.)36003' (2010 Lbs.)2000LOAD (Pounds)LOAD (Pounds)22000.70.8DEFLECTION (Inches)0.91.01.18008' (548 Lbs.)12' (215 Lbs.)9' (420 Lbs.)10' (342 Lbs.)14' (165 3DEFLECTION (Inches)United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010¼ 6\VWHP6" x 11 2" x 18 Ga.2' (858 Lbs.)Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com231Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP900
Loads and Deflection – 9" Planks ¼ 6\VWHP9" x 14 Gauge¼ 6\VWHP ¼ 6\VWHP11 2"21 2"4" LegHeight9" x 18 Gauge21 2"4"LegHeight21 50.570.690.911.2622.533.544.555.566.57891012148/ 8' &/ &' 8/ 8' &/ &' 8/ 8' &/ &' Distance Between Supports (Feet)Codes11 2"9" Aluminum(0.080)Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHPDistance Between Supports (Feet)LegCodesHeightCodesDistance Between Supports (Feet)22.533.544.555.566.577.588/ 8' &/ &' Code Key: UL Uniform Load (pounds per square foot)UD Deflection under uniform load (Inches)CL Concentrated Load (pounds)CD Deflection under concentrated load (Inches)232United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com
Uniform Loads vs. Deflection – 9" Planks9009" x 11 2" x 14 Ga.2' (821 Lbs.)800 ¼ 6\VWHPSpan (Max Uniform Load - Lbs.)Span (Max Uniform Load - Lbs.)5002.5' (365 Lbs.)7004506003' (253 Lbs.)350LOAD (Pounds)3003.5' (187 Lbs.)2505' (69 Lbs.)2004.5' (136 Lbs.)1504003' (365 Lbs.)3003.5' (268 Lbs.)5.5' (52 Lbs.)5.5' (75 Lbs.)6' (57 Lbs.)4' (136 Lbs.)6.5' (32 Lbs.)505' (100 Lbs.)4.5' (195 Lbs.)2006' (40 Lbs.)4' (96 Lbs.)1002.5' (525 Lbs.)5006.5' (45 Lbs.)1007' (367' (25 400.050.100.15DEFLECTION (Inches)16000.250.300.350.40DEFLECTION (Inches)180036009" x 21 2" x 18 Ga.2' (1648 Lbs.)0.20 LOAD (Pounds)4003400Span (Max Uniform Load - Lbs.)9" x 21 2" x 14 Ga.2' (3257 Lbs.)3200Span (Max Uniform Load - Lbs.)300014002800LOAD (Pounds)LOAD (Pounds)260012002.5' (1109 Lbs.)10003' (813 Lbs.)8003.5' (587 Lbs.)4' (442 Lbs.)60024002.5' (2197 Lbs.)2200200018003' (1433 Lbs.)160014004.5' (344 Lbs.)5' (276 Lbs.)5.5' (228 Lbs.)6' (189 Lbs.)6.5' (158 Lbs.)7' (131 Lbs.)4002003.5' (1067 Lbs.)12006.5' (287 Lbs.)8' (175 Lbs.)7' (246 Lbs.)9' (136 Lbs.)10' (100 Lbs.) 12' (56 Lbs.)14' (31 Lbs.)40020000.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6DEFLECTION (Inches)DEFLECTION (Inches)36009" x 4" x 18 Ga.3400Span (Max Uniform Load - Lbs.)200018009" x 4" x 14 Ga.Span (Max Uniform Load - Lbs.)30002.5' (1696 Lbs.)28002.5' (2677 Lbs.)2600140024003' (1340 Lbs.)LOAD (Pounds)LOAD (Pounds)2' (3507 Lbs.)3200160012003.5' (1013 Lbs.)10004' (786 Lbs.)8005' (496 Lbs.)5.5' (417 Lbs.)6' (348 Lbs.)6.5' (299 Lbs.)7' (268 Lbs.)4.5' (631 Lbs.)6004000.20.30.40.50.63' (2098 Lbs.)20003.5' (1547 Lbs.)4' (1170 Lbs.)180016004.5' (1013 Lbs.)14005' (871 Lbs.)5.5' (679 Lbs.)6' (572 Lbs.)6.5' (492 Lbs.)7' (432 Lbs.)10008' (209 Lbs.)9' (166 Lbs.)80010' (127 Lbs.)12' (98 Lbs.)14' (67 Lbs.)00.1220012002000.0Lbs.)6' (334 Lbs.)6008' (109 Lbs.) 10' (68 Lbs.) 12' (44 Lbs.)9' (89 Lbs.)14' (27 Lbs.)0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.62' (2197 Lbs.)5.5' (3984.5' (616 Lbs.)800022005' (489 Lbs.)4' (838 Lbs.)10000.70.8DEFLECTION (Inches)0.91.01.16008' (365 Lbs.)12' (1432 Lbs.)9' (280 Lbs.)10' (228 Lbs.)14' (110 21.3DEFLECTION (Inches)United Interlock GratingStrut & Supply, Inc.28005 W. Commercial Ave. Barrington, IL 60010 ¼ 6\VWHP550¼ 6\VWHP9" x 11 2" x 18 Ga.2' (572 Lbs.)Ph: 847.756.4337Fx: 847.304.1891email: CustomerService@strutandsupply.com233Index Roofwalk Metal Grating 3ULPH QJOH 6SHFLDO 0HWDOV )LEHUJODVV 6\VWHP600
¼ 6\VWHPConcentrated Loads vs. Deflection – 6" & 9" Planks5007006" x 11 2" x 18 Ga.6004004' (214 Lbs.)4.5' (190 Lbs.)2005' (163 Lbs.)5.5' (135 Lbs.)LOAD (Pounds)LOAD (Pounds)3.5' (245 Lbs.)3' (411 Lbs.)4003.5' (352 Lbs.)4' (308 Lbs.)4.5' (274 Lbs.)5' (234 Lbs.)5.5' (193 Lbs.)6' (162 Lbs.)6.5' (138 Lbs.)7' (119 Lbs.)3002006' (113 Lbs.)6.5' (96 Lbs.)1007' (83 Lbs.)10000 2.5' (493 Lbs.)5003' (286 Lbs.)300¼ 0.0526006" x 21 2" x 18 Ga.2' (1236 Lbs.)0.300.350.406" x 21 2" x 14 Ga.2' (2443 Lbs.)2400Span (Max Concentrated Load - Lbs.)Span (Max Concentrated Load - Lbs.)22001100200010003' (915 Lbs.)1800LOAD (Pounds)900800LOAD (Pounds)0.25DEFLECTION (Inches)130012000.200.15DEFLECTION (Inches)7004' (663 Lbs.)6005' (518 Lbs.)5006' (426 Lbs.)4007' (344 Lbs.)8' (327 Lbs.)3' (161
4) The planks interlock with positive friction, eliminating costly welding and bolting. 5) Field modifications are easy. Interlock Grating can be cut to size, shape, and angle at the jobsite. 6) Interlock Grating requires fewer support structures. United Interlock distribution network provides local support for complete project administration as
