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<blockquote data-quote="DaleH" data-source="post: 484939" data-attributes="member: 15636"><p>IMHO, HDPE is not a good choice for everyone, nor for bigger motors ... but well ... glad if it worked OK for the poster.</p><p></p><p><u>Weight</u> - It weighs TWICE as much as plywood of the same thickness.</p><p></p><p><u>Structural Specs</u> - HDPE is not a recognized structural material; read up on how new decks need closer joists and can't support the weight wood planks can. It is also far weaker in bending, deflection (by a large factor!), and shear than plywood. Also bends like spaghetti in warmer temps!</p><p></p><p>I've seen a 30hp Johnson warp the stern of a Lund 14SV that was re-transomed with HDPE, bent the livin' snot out of it above the knee ... thusly I would not recommend anyone use HDPE as a transom core material alone. I've seen 1/2" pieces added to a stern, but they still had wood cores.</p></blockquote><p></p>
[QUOTE="DaleH, post: 484939, member: 15636"] IMHO, HDPE is not a good choice for everyone, nor for bigger motors ... but well ... glad if it worked OK for the poster. [u]Weight[/u] - It weighs TWICE as much as plywood of the same thickness. [u]Structural Specs[/u] - HDPE is not a recognized structural material; read up on how new decks need closer joists and can't support the weight wood planks can. It is also far weaker in bending, deflection (by a large factor!), and shear than plywood. Also bends like spaghetti in warmer temps! I've seen a 30hp Johnson warp the stern of a Lund 14SV that was re-transomed with HDPE, bent the livin' snot out of it above the knee ... thusly I would not recommend anyone use HDPE as a transom core material alone. I've seen 1/2" pieces added to a stern, but they still had wood cores. [/QUOTE]
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