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Thread: glass-fiber reinforced polyester (GRP) trench drains?

  1. #1
    Join Date
    Nov 2016
    Location
    Northern California, USA
    Posts
    22

    glass-fiber reinforced polyester (GRP) trench drains?

    Looking for opinions on trench drains made from "glass-fiber reinforced polyester (GRP) pressed from sheet molding compound (SMC), which is a composite of polyester resin, mineral fillers and glass-fiber mats". Specifically, I have been directed toward a product MEA-JOSAM, 4" Pro-Plus 100 (CPS100). http://trenchdrainsupply.com/kit_pro_plus_100.asp I've also been told that the Glass Filled Nylon slotted grate will handle a pallet jack no worres.

    I've heard opinions on both vinylester concrete, and HDPE. The former being excellent, but very pricey, with great chemical resistance, but a max temp rating of 180 degrees. HDPE should generally be steered clear off in a brewery I'm told.

    Any thoughts appreciated.

    Cheers,
    Tom

  2. #2
    Join Date
    Apr 2015
    Location
    Fremont, OH USA
    Posts
    9
    Quote Originally Posted by OwlBat View Post
    Looking for opinions on trench drains made from "glass-fiber reinforced polyester (GRP) pressed from sheet molding compound (SMC), which is a composite of polyester resin, mineral fillers and glass-fiber mats". Specifically, I have been directed toward a product MEA-JOSAM, 4" Pro-Plus 100 (CPS100). http://trenchdrainsupply.com/kit_pro_plus_100.asp I've also been told that the Glass Filled Nylon slotted grate will handle a pallet jack no worres.

    I've heard opinions on both vinylester concrete, and HDPE. The former being excellent, but very pricey, with great chemical resistance, but a max temp rating of 180 degrees. HDPE should generally be steered clear off in a brewery I'm told.

    Any thoughts appreciated.

    Cheers,
    Tom
    Hi Tom,
    You've got the right idea. Vinylester and GRP-SMC are good channel materials... HDPE not so much. The Nylon grate is Class C, which is good for the weight of a pallet jack. But most trench drain manufacturers say to use Class D or E grates if you have hardwheeled traffic crossing the drains. I'd double check with your supplier or the manufacturer directly.

    Feel free to call me if you have any questions!
    Trench Drain Systems
    sales@trenchdrainsystems.com
    TrenchDrainSystems.com
    610-638-1221

  3. #3
    Join Date
    Jan 2018
    Location
    Dallas, Georgia, USA
    Posts
    3

    Grates

    I would be very concerned with the longevity of the plastic grating. The manufacturer of these grates says they will work but I have been in hundreds of breweries where they were told this and had broken grating everywhere. You need to look at the load rating on the grates and then compare to your actual loads. Remember that carts with hard tires have lots of weight on a very small point causing a severe load. Hand carts with hard tires are often more damaging to trench drain grating than vehicular traffic with air filled tires. You will be better off going ahead and spending the money on an iron or stainless steel grate up front (at least in the isles).

    Robert Finn
    Mechanical Engineer
    Dura Trench

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