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I am looking for a solution for mounting a shelf that holds a pressure sprayer to precast Concrete panel with a Foam core insulation sandwiched in the middle. total weight to support is 300 pounds, The shelf has 6 holes to mount with located in 2 rows of 3. The panel is 8 inch total (3 inches then 2-inch foam panel then 3 inches). ( diameter of holes in Shelf is 1/2 inch so I think 3/8 inch anchors are appropriate. If anyone could send a link to a product that would be great. Engineering data / Submittal type info would be very helpful as well. I need to validate that the ANchors are appropriate for precast concrete. Thanks in advance!

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    $\begingroup$ A diagram is needed. $\endgroup$
    – kamran
    Commented Mar 10, 2020 at 17:06
  • $\begingroup$ The biggest concern is vibration from the pump. Is it a standard three cylinder pump that runs about 2500 psi or so? The do-it-once solution is to bore six holes right through, then bog in six steel compression tubes that are about 1/8 shorter than the wall thickness, then hang a 1/4 backing plate and through bolt the thing. Don't underestimate what vibration can do to the mounts. How many thousand hours/yr does the pump run? $\endgroup$
    – Phil Sweet
    Commented Mar 11, 2020 at 1:14
  • $\begingroup$ Thank you for this information, I never thought of it this way, So currently the Shelf does have 6 holes to mount thru, I spec'd out Screw Anchors that are 3 inches long, We cannot go all the way to the exterior and mount a bracket like you suggested, but that is a great idea. That said, these anchors are rated to almost 7000 LB for tension and shear forces- each when fixed to a 3-inch concrete panel. $\endgroup$
    – Mike
    Commented Mar 12, 2020 at 13:56

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This is a situation that should be reviewed by a structural engineer. More about preventing damage to the panel then about support of the item.

For anchor information, check out Simpson Mechanical Anchors. The Titen HD is a common choice

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    $\begingroup$ Thank you for the link and suggesting that an engineer review, that's what we ended up doing, and the link has very useful information about the options for selecting anchors. $\endgroup$
    – Mike
    Commented Mar 12, 2020 at 14:18

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