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Thread: Ramp
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21st January 2015, 09:56 PM #31
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Originally Posted by Marc
That may be the same type material, but it is not what I was trying to describe. The modules I recently saw on boardwalks in several Nature Reserves are a rectangular grid pattern with holes approx 100mm x 25mm IIRC, and 25-30mm thick. Each module is 1m or 1.2m square from what I remember, and the surface has a non-slip finish incorporated. Perhaps someone in NP&WS could help identify the material.
Here is a link to a photo of a boardwalk at Muttonbird Island, Coffs Harbour where this material is used.
https://www.flickr.com/photos/910773...ream/lightbox/
Chas.
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22nd January 2015, 07:18 AM #32
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Oh I see, that is FRP grating.
http://www.gratingfrpaustralia.com.au/uses.html
Pultruded grating is probably the one with the most span. I'll look into it.“We often contradict an opinion for no other reason
than that we do not like the tone in which it is expressed.”
Friedrich Nietzsche
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22nd January 2015, 10:55 AM #33
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Mm ... rung a couple of places that sell FRP grates and boy oh boy are they expensive! they come in 1200x2400 so I need two sheets. The cheaper is the one that is little squares like a milk crate. $400 a sheet, the stronger one with the cross bards called "pultruded" is 560 a sheet. Hardwood would be a fraction of that price, so the only gain is weight. I have to ponder if 100 kilos gain is worth the difference of $600 to $800..........Well not a lot really.........with hardwood I can do without any diagonals since I'll have over 20 hardwood pieces bolted down by 80 bolts keeping it square. With the plastic grate I have to have steel diagonals. Not a big deal ..... Mm ..... still thinking about it.
“We often contradict an opinion for no other reason
than that we do not like the tone in which it is expressed.”
Friedrich Nietzsche
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