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Westcott Designs rock sliders installation tips?

Gaspe

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Very few of the sliders out there utilize attachments points under the frame. Those that do must be using rivnuts or something equivalent if the holes aren’t threaded.
The main stress from lifting would be borne by the side bolts and the tensile strength of the 1/4 steel I would think (though I’m not an engineer!). Westcott’s underside attachments will help oppose any rotational force on the slider.
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Toyotimothy

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Sorry about the filth, we are recovering from the winter ice storm. Here’s pictures of the sliders.

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Gaspe

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Update: Westcott informs me all of the bolts on the bottom side need rivnuts. Some hokes need to be drilled out to 11/16”. Rivnut mandrel needed is M12
 

mchops

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I have a question about the bottom holes where the rivet nuts are drilled and set. Are those some type of like drain holes that water will leak out of if water gets into the frame through other spots or is there always air flow through the bottom of the frame?
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