Yes, you do if it is 5ft 9 or taller in Oregon.
The pallet rack must be properly anchored, and you’ll need to provide seismic calculations for any state that requires them.
Most counties stick with the 5’ 9” standard. We haven’t heard of any counties with a different standard.
Can you? Yes. Should you? No.
Here’s what could happen if you don’t:
The map shows seismic activity across the United States. The more seismic activity there is in your state, the higher likelihood that you’ll be required to obtain seismic calculations. If you’re in Oregon, Washington, or California, you definitely need seismic calculations. States in the mid-west with no seismic activity often do not have requirements for seismic calculations.
The seismic calculations determine what type and how many anchors you need (as well as what kind of footplates you need.
If the top of the product is at 12ft or higher, then it is classified as High pile storage.
They are an engineer’s calculations of the stability of the racking in a seismic event (aka, earthquake). The engineer will give you the maximum capacity of each beam level based on your proposed configuration. When pricing seismic calculations, engineers consider several factors including: Racking manufacturer, upright gauge of material, strutting type and placement, type of baseplate, steel chemical composition, Beam length, face size, gauge, number of endplate pins; Beam placement (how many levels and at what heights from the ground level); how much weight is going on each level; and the thickness of the concrete.
Seismic calculations are separate from but play a part in the capacity of your rack system.
Static load is the capacity that the manufacturer states it is structurally capable of holding. All capacities are per pair of beams. This is what it could hold assuming there are no earthquakes. Seismic load is the capacity that the engineer calculates your particularly racking can hold based on the factors above. This is an important difference! We commonly get customers call us and complain because some company sold them pallet rack with a stated capacity of, for example, 5,000lbs per beam level. However, when they went to get permits for it, they found out the hard way.
The cost of seismic calculations depends on several factors, but the two largest factors are:
Usually, but it depends. One of the biggest problems with used pallet racking is that it can be difficult to permit it. As we discuss above, seismic calculations are required in most states. In order to get the seismic calculations, a seismic engineer must know the exact size, dimension, gauge, and manufacturer of the pallet racking. While the dimensions aren’t hard to figure out, the gauge and manufacturer can be more difficult. You usually do not know the manufacturer of used pallet rack. The seismic engineer may be able to identify the manufacturer from closeup photos. However, if the seismic engineer is unable to identify the manufacturer, then the engineer must perform seismic stress testing on a sample of the used racking. This is very costly. You have to send samples of the racking to the engineer for testing. If your used racking is not all exactly the same, it could be from different manufacturers, so you have to send samples of every style of racking. The cost of all the seismic stress testing required to get permits on unknown used pallet rack frequently makes it more expensive than buying new racking where the vendor already has the necessary seismic calculations.
All pallet rack must be anchored. It doesn’t take much to knock over freestanding pallet rack, and the consequences are severe. Without anchoring, any small bump to a frame or beam can easily make the whole system fall down. Have you seen videos of entire warehouses full of pallet racking collapse? Since they’re all connected, they fall like dominoes.
The short answer is, hire us to help you. However, if you really want to do it yourself, you’ll need to drill holes into the concrete for each footplate (typically two holes per footplate), use a shop vac to vacuum out the dust, and insert an anchor. Insert the anchor wedge, hit it hard with a hammer, and screw on the nut. Anchors must be torqued to the right torque. When the city/county inspector comes to do the final inspection for your pallet rack permit, they often check the torque of the anchor bolts. If it’s too tight or too loose, they’ll fail the inspection.
The engineer that provides you the seismic calculations will tell you which kind of anchors you need to use. However, for most applications we use these pallet rack anchors. The engineer will also specify which footplates your pallet rack frames need to have, and how many anchors need to be placed on each footplate. Most seismic footplates are 5” x 8” and 3/8” thick, and have four holes, though the engineer typically only requires anchors in two holes.