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Anchoring Equipment

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  • 1 year later...

When i worked for a process mechanical contractor we did a lot of equipment anchoring in many different jurisdictions. Everyone was different based on seismic zone, and the local jurisdiction requirements. I highly suggest using stainless anchors in a wash-down environment to avoid rust stains around the bases of your shiny stainless. the rule of thumb i was told by one structural engineer was that any stationary equipment with a center of gravity over 4 feet and 400 pounds should be anchored. this is probably worst case, as California and Alaska are the two worst states i have worked in for anchorage requirements. Also, Stationary is a key word as well. I have seen a lot of larger equipment such as CIP skids and pachaging equipment not be anchored if it was supplied with wheels or was listed as mobile equipment. 

I have seen a lot of variance in anchorage specifications based on the PE stamping the design. Some are very cautious and some are less cautious. I suggest making sure your structural engineer is very comfortable with anchorages of the type of equipment as a over cautious structural engineer can have a huge impact on the cost of that anchorage.

Most jurisdictions will also be OK with the manufacturers recommendation on anchorage as well in lieu of having a stamping structural engineer calculate if you can get the manufacturer to supply the anchorage detail. I always told clients to try and get the equipment manufacturer to supply the anchorage details as it was usually cheaper than hiring a PE to calc locally. I ran into this with some Italian brewing equipment that came with anchorage details. 

most permitted anchorages have some sort of inspection, either active while anchoring for epoxy type anchors or after the fact torque tests from mechanical type anchors.

Self performed work is usually less scrutinized than contractor performed work.

PM me if you have any really specific questions. I have installed equipment in about 6 different states so far and they are al differing on their procedures.


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