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  • Doko commented on dale1952's instructable Wooden Roof Rack 7 weeks ago
    Wooden Roof Rack

    Beautiful wood work made by someone that know how to do it! Hard wood is a nice and usually strong material, but due to the unpredictability of what goes inside the material, safety critical wood parts have to have a good degree of redundancy (just in case something bad happened to the young tree in the region used to make the part...) The use of a single screw to fix a wood part that will be submitted to vibrations and oscillating forces is a receipt for disaster. What will happen if one of the front parts fixing the rack to the roof fail and get loose due to an internal crack? The wood in the other parts is nice (I will use one of the ideas in my rack!), but please make the roof fixing parts in aluminum alloy, reinforced fiberglass, steel or even rectangular metal profile, not wood. R...

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    Beautiful wood work made by someone that know how to do it! Hard wood is a nice and usually strong material, but due to the unpredictability of what goes inside the material, safety critical wood parts have to have a good degree of redundancy (just in case something bad happened to the young tree in the region used to make the part...) The use of a single screw to fix a wood part that will be submitted to vibrations and oscillating forces is a receipt for disaster. What will happen if one of the front parts fixing the rack to the roof fail and get loose due to an internal crack? The wood in the other parts is nice (I will use one of the ideas in my rack!), but please make the roof fixing parts in aluminum alloy, reinforced fiberglass, steel or even rectangular metal profile, not wood. Remember that the forces trying to make things fly away of the roof are in the range of hundreds of pounds if you travel at 60 Miles/h or more, so if something fails the chances of injuring or killing someone that comes after you are far from neglectable. Stay safe ;-)

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