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GRIDWALK® Phenolic Fiberglass Grating
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Information
| Features
| Applications
| Specifications
| Tolerances
| Comparison
| View Catalog
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GENERAL INFORMATION
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GRIDWALK® Phenolic Molded and Pultruded Grating
is optimal in conditions where fire resistance,
low smoke and low toxic fumes are critical concerns.
It can stand up to the harshest environments
and provide years or service. Each panel is
produced in one solid piece with no joints,
which provides maximum corrosion resistance,
and bi-directional strength. Non-flammability
enables it to withstand direct flame for an
extended time without sustaining major structural
damage. GRIDWALK® Phenolic Molded and Pultruded
Grating is as strong as Iso-Polyester or Vinyl
Ester Resin Grating but with lower smoke and
flame levels.
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What are Phenolics?
Phenolics are in the same family of polyester, vinyl ester and epoxy
resins. They are not new and have been used in major commercial
applications before unsaturated polyesters became popular. Phenolics
are composed of phenol and formaldehyde. They are the best organic
material when it comes to safety in the event of fire. Phenolics
have long been used in household items such as toaster handles,
wiring devices, switch gears, pot and cutlery handles.
U.S. COAST GUARD APPROVED GRIDWALK® PHENOLIC PULTRUDED GRATING
American Grating GRIDWALK® Phenolic Pultruded Grating passes
U.S. Coast
Guard test requirements in accordance with U.S. Coast Guard
Policy File Memorandum 2.98 for fire retardant FRP grating, meeting
structural fire integrity Level 2. The testing was performed at
Omega Point Laboratories in San
Antonio, Texas. GRIDWALK® Phenolic Pultruded Grating is designed
to be the best product for life safety during fire. The non-flammability
enables it to withstand direct flame for an extended time without
sustaining major structural damage. Pultruded Type P (Phenolic)
fiberglass reinforced plastic grating shall be manufactured using
a premium grade fire retardant resin system. Type P meets flame
spread rating of Class 1, 5 or less as per ASTM E-84. Glass content
shall be a minimum of 60% made of corrosion resistant E glass. All
grating panels will have smooth surfaces, with no exposed dry glass,
voids or cracks. The resin system shall contain UV inhibitor. All
grating shall have a epoxy bonded silica grit surface. All ends
shall be sealed with premium resin.
Features:
- Fire Resistant
- Low Smoke
- Low Toxic Fume Emission
- Ablative
- Low Char Yield
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- Corrosion Resistant
- Light weight and easy to install
- Non-Slip Surface
- Non-Conductive and Non–Magnetic
- Impact Resistant
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Approval for this product allows fiberglass grating to replace steel
which results in significant savings in weight, ease of fabrication,
and installation. GRIDWALK® Phenolic Pultruded Grating can be used
in offshore platforms such as the following:
- Wave Zone Areas
- Wind Walls
- Mud Pits
- Preload Tanks
- Walkways
- Stairs
- Loading Areas
DEFLECTION FOR PHENOLIC PULTRUDED GRATING
Concentrated Line Load, 12" wide
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Span Inches |
Pound per square foot |
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100 |
200 |
250 |
300 |
400 |
500 |
750 |
1000 |
1500 |
2000 |
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18 |
0.0015 |
0.0052 |
0.0066 |
0.0082 |
0.0119 |
0.0161 |
0.0264 |
0.0362 |
0.0561 |
0.0725 |
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24 |
0.0081 |
0.0161 |
0.0197 |
0.0233 |
0.0341 |
0.0406 |
0.0572 |
0.0762 |
0.1137 |
0.1473 |
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30 |
0.0109 |
0.0272 |
0.0338 |
0.0404 |
0.0537 |
0.0665 |
0.0948 |
0.1308 |
0.1903 |
0.2534 |
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36 |
0.0203 |
0.0413 |
0.0503 |
0.0619 |
0.0825 |
0.1030 |
0.1501 |
0.2032 |
0.2975 |
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42 |
0.0261 |
0.0566 |
0.0712 |
0.0857 |
0.1107 |
0.1391 |
0.2134 |
0.2870 |
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48 |
0.0437 |
0.0859 |
0.1100 |
0.1318 |
0.1794 |
0.2196 |
0.3279 |
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Uniform Load, 12" Wide
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Span Inches |
Pound per square foot |
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60 |
80 |
100 |
120 |
140 |
160 |
180 |
200 |
220 |
240 |
260 |
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36 |
0.0198 |
0.0250 |
0.0303 |
0.0352 |
0.0404 |
0.0450 |
0.0497 |
0.0546 |
0.0593 |
0.0635 |
0.0681 |
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42 |
0.0325 |
0.0423 |
0.0520 |
0.0607 |
0.0702 |
0.0791 |
0.0880 |
0.0964 |
0.1055 |
0.1130 |
0.1221 |
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48 |
0.0509 |
0.0667 |
0.0824 |
0.0980 |
0.1136 |
0.1281 |
0.1426 |
0.1570 |
0.1888 |
0.2245 |
0.2607 |
Standard Sizes for Phenolic Pultruded Grating
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Shapes |
1-1/2" I-Beam |
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Opening |
40%, 50%, 60% |
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Width |
3, 4, 5 ft |
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Length |
8, 10, 12, 20 ft |
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Color |
Reddish Brown |
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Weight (Lbs/ft2) |
4.5lbs, 3.9lbs, 3.3lbs |
SPECIFICATIONS FOR PHENOLIC MOLDED GRATING
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Specifications
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| Grating
Thickness |
Mesh |
Bars/Ft. |
Bar Thickness
(Top x Bottom)
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Panel Size Standard |
Est. Wt. in lbs. |
Lbs. / Sq. Ft. |
Open Area % |
Min. Glass Cont. % |
Color |
| 1-1/2" |
1-1/2" |
8 |
.26" x .21" |
4'
x 12' |
180lbs |
3.75 |
68% |
42% |
Reddish - Brown |
| Panels
have two surface choices 1) Concave Surface 2) Extra Anti-skid
with silicon grit surface |
ADVANTAGES OF PHENOLICS
- Not easily ignitable
- Very low flame spread
- Very low smoke density
- Minimal toxic fume emission
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- Very low heat of release values (OSU test)
- Good performance under high temperatures
- Good resistance to corrosion
- Good resistance to microbiological attack
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Phenolics’ outstanding fire protection
qualities make them of interest to all of us in the FRP Industry.
Many markets, especially applications in public buildings and mass
transit will open up to products made of phenolic resin.
EXAMPLES OF TRAGIC HISTORY
The May/June 1989 issue of Fire Journal, Harwood and Hall reported
that based on 1981-1985 data, 23.8% of fire deaths were attributable
to smoke inhalation and only 6% to burns, while the largest share
of fire deaths (66.1%) were attributable to some combination of
smoke inhalation and burns. In order to reduce the number of total
deaths by fire, it is necessary to reduce the number of deaths caused
by smoke inhalation.
COMPARISON TO POLYESTER RESINS
We may achieve Class 1 flame spread ratings (flame spread < 25)
with halogenated polyesters (resin with chlorine or bromine), however,
smoke density values for these systems range from 500-800. Smoke
generated by halogenated resins is toxic and may contain halogen
acids, antimony oxide, halides and oxyhalides, etc., all very toxic.
The only gases generated by combustion of phenolics are carbon dioxide
(CO2) with trace amounts of carbon monoxide (CO) andsulphur dioxide
(SO2). No phenol or formaldehyde was detected.
Phenolics have superior flame spread (< 10) and superior smoke density
value (< 10). Oxygen index (ASTM D2863) for phenolics (35% glass)
is 45-80%.
Those concerned about the potential health
hazards posed by phenol and formaldehyde may rest assured
that material safety data sheets indicate that the amounts
of residual phenol and formaldehyde in phenolics are at
low and very safe levels. This is a valid concern since
our industry has spent millions addressing styrene and toxicity
issues.
COLOR LIMITATION
Phenolics are limited to a range of light brown to black,
whereas most phenolics are reddish brown, dark brown or
black. This makes phenolic gel coats impossible. Using an
epoxy or polyester gel coat will diminish the phenolics
flammability characteristics slightly.
Source: James E. Maas, Director of Marketing Reichhold Chemicals
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APPLICATIONS
The advanced resin and glass systems and manufacturing techniques
employed in the production of GRIDWALK® fiberglass grating
makes it ideal for use in the following areas:
Industries:
- Offshore
- Mass Transit
- Tunnels
- Mining
- Ship decks
- Refineries
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Applications:
- Flooring
- Stairs
- Walkways
- Ramps
- Trench Covers
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Select GRIDWALK® and rest assured that you have a grating
that not only has a quality appearance, but that is strong, providing
a longer service life over materials such as steel, aluminum, and
wood. By selecting GRIDWALK® grating, you can rest
assured.
Please see our GRIDWALK®
Phenolic Molded Grating Catalogue. Please click on the
picture to the right to follow the link. This requires the
Acrobat reader program to view, you can download this
program for free by clicking on this Acrobat icon.
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