GRIP STRUT Safety Grating
Safety GratingGSSG-13GRIP STRUT safety grating
Table of Contents & AdvantagesAdvantages.Proof Of Performance.General Load Information.Safer, serrated surfaceGrips soles securely in all directions. The non-slip GRIP STRUTsurface is ideal for inside or outside locations where mud, ice,snow, oil and detergents can create hazardous walkingconditions. Openings are small enough to catch most fallingtools and other dangerous objects.234-5Design Load Tables (Steel, Aluminum, Stainless Steel)Open design, convenient cleaningPermits quick drainage of fluids, chips, grease and mud. Anyice accumulation shears easily under normal foot pressure.Open design allows convenient access for cleaning, and iseasily cleaned with brush, liquid or air spray to help minimizeoverall maintenance.2-Diamond Planks - 43/4” Width . . . . . . . . . . . . . . . . . . 6-73-Diamond Planks - 7” Width . . . . . . . . . . . . . . . . . . . . . 8-94-Diamond Planks - 91/2” Width . . . . . . . . . . . . . . . 10-115-Diamond Planks - 113/4” Width . . . . . . . . . . . . . 12-138-Diamond Planks - 183/4” Width . . . . . . . . . . . . . 14-1510-Diamond Planks - 24” Width . . . . . . . . . . . . . . . . . . . 1610-Diamond Walkway - 24” Width . . . . . . . . . . . . . . . 17Comparative Performance Tables . . . . . . . . . . . . 18-19Accessories.Stair Treads20-23.24-25.26-27Specials & Fabricated ProductsSpecificationsHow To Order.Fast InstallationLight, easy-to-handle planks make installation simpler andquicker. They can be handled by one man. Most sections arerapidly bolted, clamped or welded into place, easily field-cut atvirtually any angle, or fabricated to adapt to field conditions.Several attachment devices permit fastening to most existingsurfaces; allow fast installation or disassembly.28-29.Installation RecommendationsHigh load capacity, long lifeHigh strength-to-weight performance is achieved throughdepth of section and structural design. Bridged struts withintegral side channels form a plank that can support loads withminimum transverse and longitudinal deflection. There are norivets or pressure joints to break or loosen. This sturdyconstruction provides the advantages of heavy load-carryingcapacity with minimal deflection; rugged durability withlonger-lasting performance.3031Economical to install, useIn addition to low material cost and nominal erection cost,GRIP STRUT safety grating also helps save with its longlasting, rust-resisting materials and finishes. Standard millgalvanized finish resists corrosion to provide lasting surfaces.High-strength aluminum and Types 304 and 316L stainless steelare available to provide maximum corrosion resistance. Blackunpainted steel available for installations requiring hot dippedgalvanized finish after fabrication. These light weight butbrawny panels permit substantial reduction in structural steelrequirements. Open design is self-cleaning and virtuallymaintenance free.Close-up of standard patternVersatile in applicationA variety of standard widths and channel heights combinewith numerous non-standard shapes and sizes to meet almostany requirement of strength, size, durability, weight, finish,appearance and application. GRIP STRUT safety gratingcombines safety and durability with ease of fabrication andversatility. One piece construction with no welds or rivets tofail, minimizes need for plant fabrication. Special shapes andforming can be accomplished to suit unusual requirements.Standard serrated surface2Non-serrated surface also availableGRIP STRUT
PerformanceTested by an independent laboratory for slip resistanceaccording to standards and methods established by FederalSpecifications RR-G-1602D, GRIP STRUT safety gratingexceeds all requirements of this specification. The standards where exacting - five shoe sole materialstested in three directions under five conditions: dry, greasy,muddy, soapy and icy. GRIP STRUT safety grating testedmore slip-resistant than similar materials, dependingon shoe materials and surface conditions.In survey after survey, accidents caused by falls are high onthe list of disabling and lost-time injuries and death. In fact,statistics from many states rate this type of accident second asthe cause for industry’s loss of manhours and lower productivity.As proved in the test described above, GRIP STRUT safetygrating substantially reduces this kind of accident. In addition,the hazard of falling objects is minimized by the shape and size(17/8” x 11/16”) of the surface openings.Test Performance – Slip Resistance vs. Federal Specifications12011010090807060A B C D E A B C D E A B C D E A B C D E A B C D EDryMudGreaseSoapIce50Po u n d s o f Fo r c e130A Federal Specificationfor SteelB 12 Gauge (2.6mm)Steel Grip StrutGratingC 14 Gauge (1.9mm)Steel Grip StrutGratingD Federal Specificationfor AluminumE .080 (2.0mm)Aluminum Grip StrutGratingValues determined in accordance with standards for slip-resistance established by Federal Specification RR-G-1602D. The valuesindicated are an average of values obtained for five sole materials (leather, boot rubber, shoe rubber, Neolite † and Hypalon †) testedin three directions (longitudinally, transversely and diagonally) for the surface conditions noted. Values are in pounds of forcenecessary to move a 175 pound load one inch across the surface of grating.† Mark shown is the property of its respective owner.GRIP STRUT3
General Load InformationHow To Read Load TablesTo select size of GRIP STRUT safety grating, determineload, clear span and deflection requirements. Having thisinformation, select from load tables the appropriate plank tomeet job requirements.the plank deflect relative to support points. To verify theperformance of the side channels, samples were loaded withconcentrated and uniform loads at different spans (see Figures1b/2b and 1c/2c). To approximate the most severe condition,there were no attachments between the channels and thesupports. In cases where spans are shorter, channels deeperand planks wider, strut flexure becomes more critical.Example: Clear span of 4’-0”, concentrated load requirement of300 lbs. at 0.25” maximum deflection.Select from the tables following:For 8-diamond, 183/4” wide, 21/2” channel, 12 gauge steel whichcarries a load of 416 lbs. at a 0.18” deflection. This is one size todo the job. Other sizes will carry more load if necessary. Formore economical selection, choose the greatest width that willsupport the load consistent with job requirements and choosedeeper channels rather than heavier steel gauges.2-, 3-, 4- and 5-Diamond Allowable Load andDeflection TablesSince 2- through 5-Diamond planks are relatively narrow (lessthan 1 foot wide), it can be assumed that both side channelseffectively support the concentrated load and that the gratingsurface deflection is negligible. Based upon these assumption,the values in the following Design Tables for 2-Diamond through5-Diamond have been determined.GRIP STRUT safety grating will generally carry the sameconcentrated load, tabulated in lbs. at midspan, for a givenspan, material gauge and channel height, regardless of width.(See “How load tables were prepared” described below.) Theuniform load tables are tabulated in lbs./sq.ft., which accountsfor the difference in load capacity shown for various widths.Deflection is in inches.Allowable Uniform Load (U)Values indicated in the rows adjacent to “U” are the lowest ofthe (1) maximum allowable uniform loads considering channelflexure and (2) maximum grating surface flexure.Deflection Corresponding to “U”Deflection values are indicated below the uniform loads andare in the mid-span side channel deflections for the plankscarrying the allowable uniform loads (Figure 1c and 2c).How Load Tables Were PreparedThe values shown in the following tables are based on actualload tests conducted in accordance with the provisions of theAISI Specification for the Design of Cold-Formed SteelStructural Members, 1986 Edition. To help ensure the safety ofthe tabulated loads, two aspects of GRIP STRUT safety gratingmust be considered.Allowable Concentrated Load (C)Values indicated in the rows labeled “C” are the lowest of the(1) maximum allowable concentrated load considering channelflexure (Figure 1b and 2b), with both channels effective, and (2)the maximum allowable strut load (Cs) for a 1 foot long sample(Figure 1a and 2a).The first consideration is transverse bending in the gratingsurface, which is referred to as “strut flexure”. This occurswhen the grating is loaded with either a uniform load or amid-width concentrated load, and the “struts” (gratingsurface) deflect relative to the side channels. To determine theallowable strut loads, samples of each grating material andthickness were tested for each plank width. (See Figure 1abelow and 2a on the following page). The data resulting fromthese tests was used to prepare “strut loading” tables, whichgive allowable loads and deflections considering strut flexureonly. These allowable strut loads, along with the results ofadditional tests performed on 8- and 10-Diamond grating, havebeen incorporated in the Product Selection/Design Tables onpages 6 through 17.Deflection Corresponding to “C”Deflection values indicated below “C” values in the tables arethe mid-span, side channel deflections produced when theallowable concentrated load is placed at mid-span.If grating surface deflection should be considered whenselecting a product to meet a particular specification, then thedeflection of the mid-width of the grating, relative to the sidechannels, can be calculated using both the data in the StrutLoading Tables (pages 6 -17) and the Load/DeflectionConversion formula on top of following page.Load data based on yield strength of 33,000 psi for steel, 23,000psi for aluminum, 35,000 psi for Type 304 stainless steel, and30,000 psi for Type 316L stainless steel.The second aspect of GRIP STRUT safety grating strength ischannel flexure. This occurs when the channels at mid-span ofFigure 1a - Strut LoadFigure 1b - Concentrated LoadFigure 1c - Uniform LoadLoad - CLoad - CsDCs - Concentrated Strut Load (lb./ft.)DLoad -UDC - Concentrated Load (lb.)U - Uniform Load (lb./ft. )2D Deflection (in.)4GRIP STRUT
General Load InformationLoad/Deflection Conversion FormulasIn the elastic range, deflection is proportionalto the applied load for both uniform andconcentrated loads. This relationship can beused to determine the deflection that any loadwhich is less than the allowable load willproduce, as shown in Example A. Also, ifdesired, the load which will produce a specificdeflection can also be determined if the load isin the elastic range as illustrated in Example B.Example AWhat deflection will a 300 lb. concentrated load produce on a plank(catalog number 103012) spanning 5”-0”?See page 16 for item 103012 at a span 5’-0” C 480 lb. D D @ 300 lb. 0.26”/480 lb. x 300 lb. 0.16”Example BIf a plank (catalog number 103012) is spanning 6’-0”, what concentratedload will produce a 1/4” deflection?See page 16 for item 103012 at a span 6’-0” C 400 lb. D 0.26”C @ 1/4” 400 lb./0.26” x 0.25” 385 lb.8- and 10-Diamond Allowable Load and Deflection TablesAs width increases, grating strut flexure becomes much moreimportant. 8-Diamond and 10-Diamond products are wideenough to require a change in the assumptions used to preparethe 2-Diamond through 5-Diamond Product Selection/DesignTables. No longer will it be assumed that both side channels areequally effective in supporting a concentrated load. In fact, toprovide a high level of safety, one side channel will be requiredto carry 100% of a concentrated load.The following values have been tabulated for 8-Diamond and10-Diamond grating:Allowable Uniform Load (U)Values are given in the rows labeled “U” and are the lowest ofthe (1) maximum allowable uniform loads considering channelflexure, and (2) maximum grating surface flexure.Deflection Corresponding to “U”Deflection values appear in the rows labeled “D”, below the“U” values, and are maximum deflections the allowable uniformloads would produce. Maximum deflections will occur atmid-span and mid-width and will be the sum of side channeland grating surface deflections (Figure 1c and 2c).Also strut deflection for 8-Diamond and 10-Diamond productsmay be significant. The most critical case occurs when aconcentrated load is located at mid-span and mid-width. Todetermine how the struts perform under this loading, 3 footlong samples of each material and thickness were tested. Forthese tests the side channels were continuously supportedand loads were applied using a 1 foot long and 1 inch wide barplaced parallel to the side channels at mid-width and at thelongitudinal center.Allowable Concentrated Load (C)Values tabulated in the rows labeled “C” are the lowest of the(1) maximum allowable concentrated load considering sidechannel flexure (with one side channel supporting the entireload — Figure 2b, and (2) the maximum allowable strut flexure(Figure 2a).Results of these tests, included in the 8-Diamond and10-Diamond Product Design Tables, proved the performanceof these materials when a concentrated load is applied atmid-span and mid-width. If a concentrated load is to be appliedat mid-width at the end of a plank, consult the Strut LoadingTables (pages 6-17).Figure 2a - Strut LoadDeflection Corresponding to “C”Deflection values are indicated below “C” values in the tableand are deflections the allowable concentrated load will produce at mid-span and at the mid-width. The deflection is thesum of side channel and grating surface deflectionsFigure 2b - Concentrated LoadFigure 2c - Uniform LoadLoad - CLoad - CsLoad -UDDDD Deflection (in.)GRIP STRUT5
Safe Loading Tables2-Diamond Plank — 43/4” Width4 3/4”11/8”9119/16”5/16”Depth111 7/8”/32”/16”90 /16 ”71 7 / 8”75/8”9/32”/8”/16”Product Selection/Design TablesAllowable Loads and Deflections: U Uniform Load (lb./ft. ) C Concentrated Load (lb.) D Deflection (in.)Spans to the left of heavy red line produce a deflection of 1/4” or less under a uniform load of 100 lb./ft.22MaterialGaugeSteel14 ga.Steel12 ga.Channel WeightDepth lb./lin.in.ft.Catalog(mm)(kg/m) ’9’-0’10’-0’ 11’-0” 1.07991.642161.31851.982011.5822512UDCD4179 2676 1860.04.06.091654 1324 1.07341.851431.303121.041211.552881.246GRIP STRUT
Safe Loading Tables2-Diamond Plank — 43/4” WidthProduct Selection/Design TablesAllowable Loads and Deflections: U Uniform Load (lb./ft. ) C Concentrated Load (lb.) D Deflection (in.)Spans to the left of heavy red line produce a deflection of 1/4” or less under a uniform load of 100 lb./ft.22MaterialGaugeChannel WeightDepth lb./lin.in.ft.Catalog(mm)(kg/m) �-6” 10’-0”* Available on special order.Engineering DataStrut LoadingFor Both ChannelsChannelDepthin.Sxin.Ixin.EIlb. x in.Steel14 ga.11/2”2”21/2.174.270.307.102.193.3352.96 x 1065.60 x 1069.71 x 106Steel12 ga.11/2”2”21/2.216.342.504.125.264.4883.62 x 1067.66 x 10614.09 x 246.4411.40 x 1062.51 x 1064.50 x 56.309.5441.59 x 1063.15 x 1065.55 x 106MaterialGaugeGRIP Steel14 ga.UCs62681240.10.08Steel12 0Aluminum.100”UCs58471157.12.102** U Allowable Uniform Load (lb./ft. )Cs Allowable Concentrated Load per ft. of length atmid-width (lb./ft.)27
Safe Loading Tables3-Diamond Plank — 7” /8”717/8”7/16”/16”90 Depth/16”5/8”1/8”/4”/16”Product Selection/Design TablesAllowable Loads and Deflections: U Uniform Load (lb./ft. ) C Concentrated Load (lb.) D Deflection (in.)Spans to the left of heavy red line produce a deflection of 1/4” or less under a uniform load of 100 lb./ft.22MaterialGaugeSteel14 ga.Channel WeightDepth lb./lin.in.ft.Catalog(mm)(kg/m) 0’7’-6”8’-0’9’-0’10’-0’ 11’-0” 3.95631.491851.1932514UDCD1712 1097.04.06999 5.9232012UDCD1896 1216.05.081106 D2836 1817 1263.04.06.091654 1325 07343.86981.313141.05831.572901.2533012UDCD3587 2298 1597 1174 900.04.06.09.1
3 Performance GRIP STRUT A Federal Specification for Steel B 12 Gauge (2.6mm) Steel Grip Strut Grating C 14 Gauge (1.9mm) Steel Grip Strut Grating D Federal Specification for Aluminum E.080 (2.0mm) A
of Grip Strut Grating cushions the impact of walking, lessening worker fatigue and increasing efficiency. Heavy-Duty Grip Strut Safety Grating products offer the advantage of regular Grip Strut Safety Grating (detailed in Catalog GSSGST-09), but are designed for applications of great
Heavy Duty Grip Strut Grating - Advantages Heavy Duty Grip Strut overview Every year, falls cost industry millions of dollars in lost time and production. The safer walking-working surfaces of Heavy Duty Grip Strut safety grating products help reduce
Grip Strut Grating - Advantages Advantages Economical to install In addition to low material cost and nominal erection cost, Grip Strut safety grating also helps save with its long-lasting, rust-resisting materials and finishes . Standard mill-galvanized fi
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Plane transmission diffraction grating Mercury-lamp Spirit level Theory If a parallel beam of monochromatic light is incident normally on the face of a plane transmission diffraction grating, bright diffraction maxima are observed on the other side of the grating. These diffraction maxima satisfy the grating condition : a b sin n n , (1)
1. Unpack grating and inspect for damage. 2. Grating shall be installed with cross bars on top. 3. Preliminarily install all grating into area per layout drawing. 4. Adjust spacing between panels to allow for proper pack out and equal spacing between panels and between supports. 5. Verify that all grating is adequately supported. Notching .
NORTH & WEST SUTHERLAND LOCAL HEALTH PARTNERSHIP Minutes of the meeting held on Thursday 7th December 2006 at 12:00 Noon in the Rhiconich Hotel, Rhiconich. PRESENT: Dr Andreas Herfurt Lead Clinician Dr Moray Fraser CHP Medical Director Dr Alan Belbin GP Durness Dr Anne Berrie GP Locum Dr Cameron Stark Public Health Consultant Mrs Sheena Craig CHP General Manager Mrs Georgia Haire CHP Assistant .
