QUICK INDEX
Typical Properties of FRP Structural Shapes
ENDURO SYSTEMS, INC. well known for our line of corrosion resistant cable tays and support systems also produces a line of pultruded floor grating, stairs, handrails, ladders and safety cages.

GRATEWAY™ FIBERGLASS GRATING PRODUCTS are an ideal alternative to metal grating because of their lnog life in extreme conditions.
Advantages & Benefits of GrateWay™
Corrosion Resistance
GrateWay™ eliminates normal corrosion problems.

High Strength
Pultruded fiberglass has a high glass content and will give strength to weight ratios that surpass equivalent metal products.

Low Maintenance
Fiberglass does not require a periodic maintenance program thereby reducing your repair costs. Will not rust streak onto adjacent structures.

High Impact Resistance
GrateWay™ will return to its original position without any permanent deflection or distortion...even when subjected to heavy objects being dropped on the grating.

Non-Conducting/Non-Sparking
Fiberglass products are non-conducting which eliminates the potential of a shock hazard in electrical applications.

Lightweight
Extremely lightweight compared to its metal counterparts. This makes for easy handling and installation.

Fire Retardant
As with all Enduro Fiberglass products, GrateWayª is fire retardant in accordance with ASTM-E-84 Class I.

UV Inhibited
GrateWay™contains an ultraviolet inhibiting additive in the resin in addition to a synthetic surfacing veil used in the pultrusion process to give an extra layer
of this resin on the surface.

Easily Fabricated in the Field
GrateWay™can be easily cut and drilled using normal metal or woodworking tools in conjunction with an abrasive blade or bit. As with all fiberglass products, any cut or drilled areas should be coated with a resin afterwards to prevent premature degradation of the composite.

Low Thermal Conductivity
Fiberglass has a very low level of thermal conductivity and will not transfer heat or cold like metal product.

Cost Effective
GrateWay™ fiberglass systems will give long life in extremely harsh chemical environmentsÉreducing the need to replace grating, stairs, handrails or ladders in a short period of time due to severe corrosion.

Surface
Non-skid surface of recycled crushed glass, applied to an adhesive, then painted; to offer increased surface traction. WonÕt fatigue with use, and alleviates slippage in wet, oleaginous areas. Withstands most chemically aggressive environments.

Non-Interfering
Fiberglass is transparent to radio waves. This is important to any facility or structure which depends on two-way radio, cellular phone or electronic pagers for communications.

Safety & Comfort
The immediate and accumulated negative effects of working on a grating surface are lessened considerably with GrateWayª Grating. This is due primarily to the larger surface area contacted while walking or kneeling on the surface.
 
Pultruded Composites
Enduro GrateWay™ Fiberglass Grating is manufactured using a pultrusion process which produces the high strength structural bearing bars and locking spacer bars necessary for uniform strength. These component parts are made with continuous glass rovings and continuous strand mats to give bidirectional strength. In addition, all pultruded components are wrapped with a synthetic surfacing veil to give maximum corrosion resistance and protection from ultraviolet ray degradation. All of these materials are pulled through a resin bath containing a fire retardant resin with UV stabilizers. These are then pulled through a heated die which cures them into the final shape.
 
Resin Systems
Resin Systems Two standard composite resin systems are available. For most applications, polyester fire-retardant (FR-P) is the more widely used. A vinyl ester composite fire-retardant resin system (FR-VE) is recommended where strong acids such as hydrochloric acid, strong alkalies such as caustic soda, organic solvents and halogenated organic conditions exist. Also, in any area where temperatures will reach or exceed 175 F, vinyl ester is preferred for its superior strength and stiffness retention.
 
Corrosion Resistance of Resin Systems
Two standard composite resin systems are available. For most applications, isophthalic polyester fire-retardant (FR-P) is the more widely used. A vinyl ester composite fire-retardant resin system (FR-VE) is recommended where strong acids (such as hydrochloric acid), strong alkalies (such as caustic soda), organic solvents and halogenated organic conditions exist. An abbreviated Guide is provided below to assist in the selection of the proper resin system for individual application.

All composite material has an ultra-violet light inhibiting chemical additive and has a maximum flame spread of 25 or less, per ASTM E-84 (Class 1 flame spread). All pultruded products have complete Nexus Veil Coverage (outer surfacing fabric) to provide maximum chemical and UV protection.
 
CORROSION RESISTANCE OF RESIN SYSTEMS
Chemicals 75°F 160°F
Acetic Acid 5% FR-P FR-P
Acetic Acid 25% FR-P FR-VE-210° (*)
Aluminum Potassium Sulfate 5% FR-P FR-P
Ammonium Hydroxide 10% FR-P FR-VE-150°
Ammonium Nitrate FR-P FR-P
Benzenesulfonic Acid 5% FR-P FR-P
Calcium Chloride FR-P FR-P
Carbon Tetrachloride FR-VE FR-VE-100° (*)
Chlorine Dioxide 15% FR-P FR-VE-150° (*)
Chromic Acid 5% FR-P FR-VE-150° (*Call)
Copper Sulfate FR-P FR-P
Diesel Fuel No. 1 FR-P FR-P
Diesel Fuel No. 2 FR-P FR-P
Ethylene Glycol FR-P FR-P
Fatty Acids 100% FR-P FR-P
Ferrous Sulfate FR-P FR-P
Fluosilicic Acid FR-VE FR-VE (*Call)
Hydrochloric Acid 1% FR-P FR-P
Hydrochloric Acid 15% FR-P FR-VE-180° (*)
Hydrochloric Acid 37% FR-P FR-VE-150° (*)
Hydrogen Sulfide FR-P-140° FR-VE-210° (*)
Kerosene FR-P FR-P
Magnesium Chloride FR-P FR-P
Methyl Alcohol 10% FR-P FR-VE-150° (*)
Naphtha FR-P FR-P
Nitric Acid 5% FR-P FR-P
Nitric Acid 20% FR-VE FR-VE-120° (*)
Phosphoric Acid 10% FR-P FR-P
Phosphoric Acid 30% FR-P FR-P
Phosphoric Acid 85% FR-P FR-P
Sodium Bicarbonate 10% FR-P FR-P
Sodium Bisulfate FR-P FR-P
Sodium Carbonate FR-P FR-VE
Sodium Chloride FR-P FR-P
Sodium Hydroxide 1 - 50% FR-VE FR-VE-120° (*)
Sodium Hypochlorite 5% FR-P FR-VE-120° (*)
Sodium Nitrate FR-P FR-P
Sodium Silicate FR-P FR-VE-210° (*)
Sodium Sulfate FR-P FR-P
Sulfuric Acid 0 - 30% FR-P FR-P
Sulfuric Acid 30 - 50% FR-VE FR-VE
Sulfuric Acid 50 - 70% FR-VE FR-VE-180° (*)
Trisodium Phosphate 25% FR-P FR-VE-210° (*)
Trisodium Phosphate - All FR-VE FR-VE-210° (*)
Water, Distilled FR-P FR-P
 Download a printable Adobe Acrobat version of this section.
 
Load Capacity Deflection of GrateWay™
Span In (mm) Concentrated Load-Pounds (Kg)
100 (45.4) 250 (113.4) 500 (226.8) 750 (340.2) 1000 (453.6) 1500 (680.4) 2000 (907.2)
12 (305) - - - - .012 (.30) .019 (.48) .026 (.66)
18 (457) - - .016 (.41) .024 (.61) .032 (.81) .048 (1.22) .065 (1.65)
24 (610) - .018 (.46) .037 (.94) 0.54 (1.37) .072 (1.83) .105 (2.67) .143 (3.63)
36 (914) .022 (.56) .056 (1.42) .112 (2.84) .170 (4.32) .229 (5.82) .345 (8.76) .461 (11.71)
48 (1219) .051 (1.29) .130 (3.30) .263 (6.68) .396 (10.06) .529 (13.44) - -
60 (1524) .099 (2.51) .250 (6.35) .507 (12.88) - - - -
               
Span In (mm) Uniform Load-Pounds (Kg/SQ. Meter)
50 (244) 75 (366) 100 (488) 150 (732) 200 (976) 250 (1221) 300 (1465)
12 (305) - - - - - - -
18 (457) - - - - - - -
24 (610) - - - .014 (.36) .019 (.48) .023 (.58) .027 (.68)
36 (914) .020 (.51) .032 (.81) .042 (1.07) .064 (1.63) .085 (2.16) .106 (2.69) .128 (3.25)
48 (1219) .064 (1.63) .098 (2.49) .133 (3.38) .198 (5.03) .264 (6.71) .331 (8.41) .395 (10.03)
60 (1524) .155 (3.94) .234 (5.94) .313 (7.95) .474 (12.04) - - -
Note: Deflections less than 0.01" (0.25) and greater than 0.50" (13.46) have been omitted.
 
TYPICAL PROPERTIES - FRP STRUCTURAL SHAPES
Mechanical (coupon) FR-P FR-VE
Longitudinal Direction
Ultimate Tensile Strength, psi (ASTM D638)
30,000
35,000
Ultimate Compressive Strength, psi (ASTM D695)
30,000
35,000
Ultimate Flexural Strength, psi (ASTM D790)
30,000
35,000
Tensile Modulus, psi x 106
2.5
3.0
Compressive Modulus, psi x 106
2.5
2.5
Flexural Modulus, psi x 106
1.6
2.0
Ultimate Shear Strength, psi
5,500
7,000
Ultimate Bearing Stress, psi
30,000
35,000
Izod Impact Strength, Ft.-Lbs. per inch of notch (ASTM D256) (sample thickness 1/8" except 1/4" for rod)
25
30
Electrical
Electric Strength, short term in oil, 1/8", vpm (ASTM D149)*
200
200
Electric Strength, short term in oil, KV per inch
35
35
Dielectric Constant, 60 Hz. (ASTM D150)*
5.6
5.2
Dissipation Factor, 60 Hz. (ASTM D150)*
0.03
0.03
Arc Resistance, seconds (ASTM D495)**
120
120
Fire Retardant Properties
Flame Resistance, ign/burn, seconds (FTMS 406-2023)
75/75
75/75
Intermittent Flame Test, rating (HLT-15)
100
100
Flammability Test, average time of burning 5 seconds, average extent of burning 15mm (ASTM D635)
Surface Burning Characteristics, maximum (ASTM E84)
15
15
Mechanical (coupon)
FR-P
FR-VE
Transverse Direction
Ultimate Tensile Strength, PSI
7,000
10,000
Ultimate Compressive Strength, PSI
15,000
20,000
Ultimate Flexural Strength, psi
10,000
14,000
Tensile Modulus, psi x 106
0.8
1.0
Compressive Modulus, psi x 106
1.0
1.2
Flexural Modulus, PSI x 106
0.8
1.0
Ultimate Shear Strength, psi
5,500
6,000
Ultimate Bearing Stress, psi
30,000
35,000
Izod Impact Strength, Ft.-Lbs. per inch of notch (ASTM D256)
4
5
Barcol Hardness (ASTM D2583-75)
50
50
Full Section in Bending
Modulus of Elasticity, psi x 106
2.5
3.0
Tensile Strength, psi
20,000
25,000
Compressive Strength, psi
20,000
25,000
Thermal
Thermal Coefficient of Expansion, Inches/Inch/¡F (ASTM D696)**
5 x 10-6
5 x 10-6
Thermal Conductivity, BTU per Sq. Ft./Hr./¡F/In. (ASTM C-1776-76)
4
4
Specific Heat, BTU/Lb./°F
0.28
0.28
Other
Density, Lbs./In.3 (ASTM D792)
0.065
0.065
Specific Gravity (ASTM D792) 1.80
1.80
1.80
Water Absorption, Max. % by weight (24 hour immersion) (ASTM D570)
.50
.50
* Specimen tested perpendicular to laminate face. Note: 1 PSI = 6.894 K Pa, 1 Ft.-Lb./In. = 5.443 kg-m/m
** Indicates reported value measured in longitudinal direction.
Note: Depending on the specific glass content and resin, the strength and stiffness properties may be significantly higher.

Refer to FR-VE Resin for fire retardant properties of threaded rod.

Test results are for studs with single nuts only. Proper safety factors should be applied to testing.

All values are based on laboratory test results.
GrateWay™ Typical Applications
  • Offshore Platforms • Pulp and Paper
  • Food Processing • Power Plants
  • Desalination Plants • Plating Facilities
  • Marine • Waste Water Treatment
  • Mining • Outdoor Work Areas
  • Livestock Maintenance • Cooling Towers
  • Resins • And more!
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