TECHNICAL

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TECHNICAL INFORMATION

LOAD DATA as per typical loading applications: Open Mesh Grating

Load Deflections are calculated over distance between Joist centres (i.e. 'Clear Spans' + thickness of joist.) (Refer A1-B1 in diagram - click to enlarge)

2.5 Kpa = Light Access Platforms & Conveyor Walkways

4.0 Kpa = Standard Australian Platform Loading

5.0 Kpa = Standard British Platform Loading

7.5 Kpa = Boiler House & Power Station Platform Loadings

(1 Kpa is equivalent to a Uniform Load of at least 100 Kgs per Square Metre.)

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NB: [1] All dimensions in mm.

[2] Recommended Maximum deflection for Pedestrian Comfort is 5 mm.

[3] Envirowalk Mini-Mesh, Micro Mesh and Micro6.8 are all based on the same 40x40 main grid pattern, therefore the same load data applies through all thicknesses of H22, H30 & H40 detailed in below tables.

All specifications are based on full panels.

FRP MOULDED GRATING
UNIFORM LOAD TABLE Kpa: (Deflection in mm)
SPAN	MESH SIZE	HEIGHT	2.5 Kpa	4.0 Kpa	5.0 Kpa	7.5 Kpa
610	Mini-Mesh	22	1.80	2.80	3.20	4.90
	38 x 38 Square Mesh	25	1.27	2.04	2.55	3.83
	Rectangular Mesh	25	0.9	1.35	1.62	2.43
	Mini-Mesh	30	0.65	1.05	1.35	2.15
	38 x 38 Square Mesh	38	0.45	0.57	0.82	1.22
	Mini-Mesh	40	0.39	0.50	0.68	1.14
	50.7 x 50.7	50.8	0.20	0.33	0.41	0.61
750	38 x 38 Square Mesh	25	3.02	4.70	6.07	9.11
	Rectangular Mesh	25	2.10	3.40	4.20	4.90
	38 x 38 Square Mesh	30	1.40	2.60	3.90	4.50
	Mini-Mesh	30	1.34	1.92	3.20	4.15
	38 x 38 Square Mesh	38	1.00	1.40	2.25	3.00
	Mini-Mesh	40	0.95	1.35	2.12	2.80
	50.7 x 50.7	50.8	0.65	0.90	1.30	1.80
914	Mini-Mesh	30	3.22	-	-	-
	38 x 38 Square Mesh	38	1.75	2.61	3.65	5.28
	Mini-Mesh	40	1.40	2.40	2.80	4.20
	50.7 x 50.7	50.8	0.91	1.45	1.82	2.73
1000	38 x 38 Square Mesh	38	2.45	3.80	4.80	-
	Mini-Mesh	40	2.02	3.23	4.10	-
	50.7 x 50.7	50.8	1.37	2.19	2.73	4.10
1219	50.7 x 50.7	50.8	2.81	4.49	-	-

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CONCENTRATED POINT LOAD TABLE Kgs: (Deflection in mm)
SPAN	MESH SIZE	HEIGHT	200	400	600	800	1000	1500
457	Mini-Mesh	22	2.20	4.20	-	-	-	-
	38 x 38 Square Mesh	25	1.75	3.35	5.01	6.70	8.24	-
	Rectangular Mesh	25	1.45	2.72	3.85	5.15	6.50	-
	Mini-Mesh	30	1.25	2.70	3.90	5.20	6.50	-
	38 x 38 Square Mesh	38	0.7	1.20	1.78	2.30	2.90	4.10
	Mini-Mesh	40	0.65	1.14	1.71	2.25	2.80	4.15
	50.7 x 50.7	50.8	0.41	0.72	1.02	1.28	1.70	2.30
610	Mini-Mesh	22	4.50	-	-	-	-	-
	38 x 38 Square Mesh	25	3.63	-	-	-	-	-
	Rectangular Mesh	25	2.94	-	-	-	-	-
	Mini-Mesh	30	2.05	4.07	-	-	-	-
	38 x 38 Square Mesh	38	1.25	2.29	3.05	4.19	5.00	7.60
	Mini-Mesh	40	0.99	1.88	2.84	3.82	4.30	6.48
	50.7 x 50.7	50.8	0.58	1.10	1.57	2.08	2.70	3.95
750	Rectangular Mesh	25	5.85	-	-	-	-	-
	38 x 38 Square Mesh	30	4.15	-	-	-	-	-
	Mini-Mesh	30	3.92	-	-	-	-	-
	38 x 38 Square Mesh	38	2.15	4.30	6.21	-	-	-
	Mini-Mesh	40	1.91	3.72	5.58	-	-	-
	50.7 x 50.7	50.8	1.31	2.55	3.85	-	-	-
914	Mini-Mesh	30	5.21	-	-	-	-	-
	38 x 38 Square Mesh	38	2.63	5.61	-	-	-	-
	Mini-Mesh	40	2.42	4.83	-	-	-	-
	50.7 x 50.7	50.8	1.41	2.72	4.20	5.82	6.95	10.42
1000	38 x 38 Square Mesh	38	3.55	-	-	-	-	-
	Mini-Mesh	40	3.35	6.05	-	-	-	-
	50.7 x 50.7	50.8	1.98	3.35	4.98	-	-	-
1219	50.7 x 50.7	50.8	2.65	5.45	-	-	-	-

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LOAD DATA: Grating with Covered Top

(Deflection in mm)

UNIFORM LOAD TABLE: COVER TOP GRATING
Type	Span	2.5 kpa	4.0 kpa	5.0 kpa	7.5 kpa
H38+3	600	0.16	0.25	0.32	0.48
	1000	1.2	2.0	2.5	3.7
	1200	2.5	4.1	5.1	-
	1400	4.7	7.5	-	-

H38+5	600	0.13	0.2	0.25	0.38
	1000	1.0	1.6	1.9	2.9
	1200	2.0	3.2	4.0	6.0
	1400	3.7	6.0	7.4	-

H50+3	600	0.09	0.14	0.17	0.26
	1000	0.7	1.1	1.3	2.0
	1200	1.4	2.2	2.8	4.1
	1400	2.6	4.1	5.1	7.7

H50+5	600	0.07	0.11	0.14	0.21
	1000	0.5	0.9	1.1	1.6
	1200	1.1	1.8	2.2	3.3
	1400	2.1	3.3	4.1	6.2

NB: PRODUCT CODES FOR COVERED TOP GRATING:

To calculate the Product Code for a specified product please affix the Dimensions as noted in the Height column to EnviroCT: (e.g. A 38+5 mm high Grating read as: EnviroCT38+5)

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CORROSION RESISTANCE DATA

Corrosion Resistance Guide for Moulded Grating
RESIN:	Type V		Type I		Type O
Chemical Type	Concentration %	Temperature F/⊥	Concentration %	Temperature F/⊥	Concentration %	Temperature F/⊥
Acetic Acid	50	180/82	50	125/52	5	77/25
Aluminium Hydroxide	100	180/82	100	160/71	ALL	-
Ammonium Chloride	ALL	210/99	ALL	170/77	ALL	-
Ammonium Bicarbonate	50	160/70	15	125/52	ALL	-
Methacrylic Acid	99	95/35	-	-	-	-
Ammonium Hydroxide	28	100/38	28	N/R	ALL	N/R
Ammonium Sulphate	ALL	210/99	ALL	170/77	ALL	-
Benzene	100	92/40	ALL	N/R	ALL	N/R
Benzoic Acid	SAT	210/99	SAT	150/66	ALL	77/25
Borax	SAT	210/99	SAT	170/77	SAT	113/45
Calcium Carbide	ALL	180/82	ALL	170/77	ALL	-
Calcium Nitrate	ALL	210/99	ALL	180/82	ALL	-
Carbon Tetrachloride	100	92/40	100	N/R	100	N/R
Chlorine, Dry Gas	-	210/99	-	140/60	-	N/R
Chlorine Water	SAT	200/93	SAT	80/27	SAT	N/R
Chromic Acid	10	150/65	5	70/21	5	N/R
Citric Acid	ALL	210/99	ALL	170/77	ALL	77/25
Calcium Chloride	ALL	210/99	ALL	170/77	ALL	104/40
Copper Cyanide	ALL	210/99	ALL	170/77	ALL	77/25
Copper Nitrate	ALL	210/99	ALL	170/77	ALL	-
Ethanol	10	155/82	50	75/24	10	77/25
Ethylene Glycol	100	200/93	100	90/32	100	104/40
Hydrofluoric Acid	10	149/65	-	-	-	-
Ferric Chloride	ALL	210/99	ALL	170/77	ALL	104/40
Ferrous Chloride	ALL	210/99	ALL	170/77	ALL	86/30
Formaldehyde	37	140/60	50	75/24	25	86/30
Gasoline	100	180/82	100	75/24	100	95/35
Glucose	100	210/99	100	170/77	ALL	-
Glycerine	100	210/99	100	150/66	100	-
Hydrobromic Acid	50	150/65	50	120/49	18	-
Hydrochloric Acid	37	150/65	37	75/24	10	86/30
Hydrogen Peroxide	30	150/65	5	100/38	5	N/R
Lactic Acid	ALL	210/99	ALL	170/77	ALL	77/25
Lithium Chloride	SAT	210/99	SAT	150/66	ALL	-
Magnesium Chloride	ALL	210/99	ALL	170/77	ALL	104/40
Magnesium Nitrate	ALL	210/99	ALL	140/60	ALL	86/30
Magnesium Sulphate	ALL	210/99	ALL	170/77	ALL	104/40
Mercuric Chloride	100	210/99	100	150/66	100	104/40
Mercurous Chloride	ALL	210/99	ALL	140/60	ALL	104/40
Nickel Chloride	ALL	210/99	ALL	170/77	ALL	104/40
Nickel Sulphate	ALL	210/99	ALL	170/77	ALL	104/40
Nitric Acid	20	130/54	20	70/21	20	N/R
Oxalic Acid	ALL	210/99	ALL	75/24	ALL	N/R
Perchloric Acid	30	100/38	10	N/R	10	N/R
Phosphoric Acid	100	210/99	100	120/49	80	N/R
Potassium Chloride	ALL	210/99	ALL	170/77	ALL	104/40
Potassium Dichromate	ALL	210/99	ALL	170/77	ALL	77/25
Potassium Nitrate	ALL	210/99	ALL	170/77	ALL	104/40
Potassium Sulphate	ALL	210/99	ALL	170/77	ALL	104/40
Propylene Glycol	ALL	210/99	ALL	170/77	ALL	104/40
Sodium Acetate	ALL	210/99	ALL	160/71	ALL	104/40
Sodium Bisulphate	ALL	210/99	ALL	170/77	ALL	-
Sodium Bromide	ALL	210/99	ALL	170/77	5	-
Sodium Cyanide	ALL	210/99	ALL	170/77	5	N/R
Sodium Hydroxide	25	180/82	N/R	N/R	N/R	N/R
Sodium Nitrate	ALL	210/99	ALL	170/77	ALL	104/40
Sodium Sulphate	ALL	210/99	ALL	170/77	ALL	104/40
Stannic Chloride	ALL	210/99	ALL	160/71	ALL	104/40
Sulphuric Acid	50	183/80	25	75/24	10	-
Tartaric Acid	ALL	210/99	ALL	170/77	ALL	-
Vinegar	100	210/99	100	170/77	ALL	-
Methanol	10	183/84	N/R	N/R	N/R	N/R
Sea Water	ALL	210/99	ALL	158/70	ALL	113/45
Distilled Water	100	180/82	100	170/77	ALL	86/30
Zine Nitrate	ALL	210/99	ALL	170/77	ALL	104/40
Zine Sulphate	ALL	210/99	ALL	170/77	ALL	104/40
Remarks: 1. ALL refers to any concentration, SAT refers to saturated solution, N/R means not recommended and 每 means no information is available. 2. Tests from resin manufacturers and experiences indicate that the resin can withstand the corrosion conditions listed above. And the corrosion resistance data listed above is just for reference since the real environments are beyond control. 3. If products are used in other environments not mentioned above, please contact us.

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INSTALLERS

S.A. & L.E. Graham ABN: 19 779335903

Metal Fabrication and General Construction

Manufacturer of JEKAMS Equipment

Contact: Stewart Graham

2 ELM Rd, Wagga Wagga, NSW 2650

Phone: (02) 6922 5819 Fax: (02) 69225818

Mobile: 0417 669 375

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Stewart Graham is a Preferred Builder & Installation expert of Envirowalk FRP Grating at the Minnamurra Rainforest Centre near Wollongong in the Illawarra Region (Please see photos on Home Page of this web site.) Stewart was also responsible for fabrication of the structure for the fabulous lookout at Granite Falls, NSW (See Photos below)

Working from the Murray to Wollongong and Beyond!

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CUTTING AND INSTALLATION

Cutting FRP grating is so much easier than cutting steel or alloys. It can be performed on site with ease provided you have the facilities to use power tools - Even a hand held hacksaw can be used if necessary!

Although the dust from FRP grating is low toxic, as with any cutting situation that may create a dust problem, it is important to wear dust protective clothing and equipment such as dust masks.

Some of the tools commonly used to cut and smooth FRP Grating.

Dust Protection: Even though it has a very low toxic content, cutting FRP products creates a very fine dust and it is recommended to use full face dust protection similar to that shown here.

Diamond Tip cutting blade: To suit a circular saw and/or an angle grinder as shown in the images below. Although a segmented blade is shown and may be used, Envirowalk prefers to recommend the continuous turbo rim cutting blade.

Circular Saw: A saw requiring a 184mm blade should service most requirements. Best to use a wet saw where possible to minimize dust cloud.

Reciprocating Saw with Masonry blade or Jigsaw with ceramic blade (The latter for mesh less than 30mm thick)

Angle Grinder: It is advisable to have two: a small (115mm) and a larger (180mm)

Straight Edge Guide: This is important when cutting diagonally across panels: It will help prevent the saw or grinder 'kicking' off line.

Small sanding grinder: With a 40 grit Metal Flap disc, this can be used to clean off cut edges.

Small Paint Roller: Using disposable roller sleeves. In areas of high corrosion it is advisable to apply a thin coating of resin/Gelcoat to the exposed edges as added protection. The resin/sealer may also be brushed on if preferred.

NB: A coarse bladed hacksaw can also be useful to trim off any undesired protrusions of load bars.

EnviroTread EnviroTread HELPFUL HINTS EnviroTread EnviroTread

When placing panels over a slight hump or change in angle in gradient that requires the panel to bend downward, it may be possible to take advantage of the flexibility of FRP by cutting a wedge groove on the underside of the panel to allow the panel to conform to the required shape without excessive resistance. This reduces the number of joining gaps.

The following pictures illustrate the cutting for corners and cut-outs.

When panels are cut evenly through the axis of change in direction Mini-Mesh is ideal as the load bars match up and the resulting odd shape apertures do not detract from it's aesthetic appearance.

NB: Although edge bars can be bonded to the cut edges of panels it is not recommended as they do tend to come loose in a relatively short period of time: Bonding FRP edge bars does not have same strength as welding steel to steel.

Another means of changing direction is to use cover (solid) top panels of equal thickness cut to wedge shapes: The Lake Thetis walkway used 30mm thick (H30) 38x38 grid mesh in conjunction with 25+5 cover top (i.e. H25 Mesh with 5mm flat plate bonded to the surface and with grit anti-slip surface.)

Cut outs around trees, rocks, or other obstacles is best performed by using a reciprocating saw with masonry blade for panels more than 25mm thick or a jig saw with ceramic blade for panels up to 25mm thickness.

Round off cut edges to aid against injuries. To do this we recommend using a 40 grit metal flap disc in a 127mm diametre grinder. Only light pressure should be used when doing this.

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When kickboards are required along the top edges of walkways it is possible to insert a Standard Mesh Type M Clip from the underside as shown in photo illustration. The fastener Bolt/Screw would then be secured in a cavity that would reduce the risk of tampering. (In the case of Mini-Mesh Grating it would be necessary to either pre-drill the infill bars or use a suitable self-tapping fastener.)

The hole diameter in the Standard Mesh Clip is 8.5 mm

CONTACT US

Envirowalk Pty Ltd ABN: 29 141844671

13 Katrina St

Lake Heights

NSW 2502

Phone: 61 (0)2 42 741 563 Accounts: 61 (0)2 42 749 888 Warehouse: 61 (0) 2 46 562 278

Mobile: Lee: 0412 534 204 Grahame: 0407 778 940 EnviroTread EnviroTread EnviroTread EnviroTread

Direct initial enquiries to: office@envirowalk.com

NB: Envirowalk supplies direct throughout Australia from our Campbelltown and Wollongong locations.

While Envirowalk Pty Ltd has taken all reasonable care in the preparation of this Website, it takes no responsibility for any loss that may result from relying on its contents. Customers are advised to make their own enquiries as to whether any products described within this website are suitable for their intended use. Information contained in this Website may vary without notice.