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Comosite Beam using Plastic Wood and Aluminum or GRP.

Comosite Beam using Plastic Wood and Aluminum or GRP.

Comosite Beam using Plastic Wood and Aluminum or GRP.

I am interested in hearing from anyone who has any experience of using Re-cycled Plastic wood in Composite Beam Construction. I intend to use a commercially available Plastic Wood section, e.g. 2x6, and form a composite beam using 2 sections of plastic wood along with a 5mm thk. flitch plate of either aluminum or Glass Reinforced Plastic. The composite will be constructed by bonding the sections together using an adhesive. What adhesive should I use which will perform in an externally exposed hot and humid climate? I think finding the right adhesive which can be applied on site will be the big problem. I do not wish to use bolts to form the composite beam as the beams will be directly exposed and aesthetics are important. Can anyone help?

RE: Comosite Beam using Plastic Wood and Aluminum or GRP.

There is a 'Adhesives & Sealants' forum under Plastics (Things). You may get some info there by posting the same.

RE: Comosite Beam using Plastic Wood and Aluminum or GRP.

1. Did you cast FIBERMESH road? how is results.
2. Do you mean exposed beam and plastic wood PPCP window frames joints? pls open a bit the subject.
3. How did you make exposed beam? I donot under stand.

RE: Comosite Beam using Plastic Wood and Aluminum or GRP.

I have noticed the plastic wood beams and planks, used in outdoor tables and swing sets in my neighborhood, have problems with deflection. I don't know if there is any strength reduction in the members but it doesn't look good. Be careful!

RE: Comosite Beam using Plastic Wood and Aluminum or GRP.

Plastic Wood has a very low Modulus of Elasticity approx. 20 times lower than timber for an equivalent section size. Therefore, deflection is off critical importance when using this material in any sort of a structural manner. By using GRP as part of a composite construction I hope to control the deflection by increasing the overall E value of the section. The bending strength of Plastic Wood is equivalent to Timber (Douglas-Fir)if not higher in some cases. The 3M Company is currently investigating the appropriate adhesive to use. Will keep you all posted on any developments.

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