1. #1
    Forum Member

    Join Date
    Aug 2006

    Default Finnform vs. Plywood

    Can someone please confirm or deny application in a Trench Rescue using Finnform panels versus Plywood? It was explained to me that it is required to use 14-ply with my strongbacks as trench panels. Since 3/4" Finnform is actually 14-ply...this is what is recommended. Standard 3/4" plywood is only 7-ply and requires 2 layers thus making it very heavy to work with.

  2. #2
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    pasobuff's Avatar
    Join Date
    Aug 2005
    Loverly upstate NY


    Our UTSAR team has FinnForm for use.....some specs...

    The superior hardwood strength properties of Finnish White Birch combined with thin multiple veneer panel construction makes FinnForm the benchmark for quality in the plywood forming industry. The 220g/m2 phenolic surface film on both faces provides very high reusability while producing good, well-compacted concrete. That is why architects and specifiers select FinnForm for high profile concrete projects throughout the country. There is only one FinnForm—easily identified by its red colored film faces. FinnForm is available in thicknesses from 1/4" to 1 1/2". Standard sizes are 8'x4', 5'; 10'x4', 5'; 12'x4', 5'
    And if you look here, there are specs - http://www.pdusa.com/products/finnform2.htm

  3. #3
    Forum Member
    GTRider245's Avatar
    Join Date
    May 2005


    We use it as well. I have never used plywood before, but the FF is a heck of a lot easier to clean that I would imagine plywood being.
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  4. #4
    MembersZone Subscriber

    Join Date
    May 2000
    Wheaton IL


    Check your regs. Finn Form is 3/4 inch and the plywood required is 1 1/4 thick. The best explanation I have heard is that plywood (even that grade) is relatively easy to obtain where Finn Form in some regions is hard to purchase. Finn Forms also store well while plywood is more of a one use tool, because it doesn't weather as well.

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