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Liquor Warehouse Live Load....

Liquor Warehouse Live Load....

Liquor Warehouse Live Load....

Alrighty, now that I've got your attention!
Seems to be a little disagreement between the architects and the engineers.  Arch. propose a mezzanine for a liquor store is 125 psf, and us engineers think 250psf is the more appropriate live load.

I've calculated that 12oz. beer cans (full) per cubic foot weigh 42 pcf.  Stacked 8 feet high is 336 psf.  Obviously you cant stack cases of beer solid on a mezzanine - you need pathways to access this beer.  So it would seem that the 250 psf would be appropriate.

A penny for your thoughts.

RE: Liquor Warehouse Live Load....

IBC Table 1607.1 calls for 125 psf for light storage and 250 psf for heavy storage, but it also states "shall be designed for heavier loads if required for anticipated storage".

RE: Liquor Warehouse Live Load....

That shouldn't even be an argument.  I would start at 250 and go up if necessary.

RE: Liquor Warehouse Live Load....

The 250 psf is the way to go. What do architects know. Just kidding.. NOT... LOL

the heavy liquid adds up in hurry! I would figure the height of the shelf and how much liquor can be stacked. Then I would use density of water to compute total weight. Then I would divide by mezzanine area and she what you come up. I would use the heaviest load which is conservative.


RE: Liquor Warehouse Live Load....

While all of our codes usually deal with a uniform live load across a floor, keep in mind that they also provide for smaller concentrated loads. In your case, you've correctly done some calculations to get a handle on what you really have as far as weight.

I would go a few steps further:

1.  Be sure in your calculation of 336 psf that you account for pallet spaces, rack legs causing gaps in the product, etc. - otherwise you are way too conservative.

2.  Determine a two-tiered approach.  Directly under the product you will have the heaviest weight.  In the aisles you will have product plus whatever moves that product plus the guy moving the product.  The larger support members such as girders and some beams taking large tributary areas will support an average of these loads while your deck slab, or smaller spanned beams may take a smaller, and heavier concentration.

3.  In other words, there's nothing that requires you to come up with just one number for live load here.  Use your wits and account for the spaces, tributuary areas, and max./min. loads that will actually occur.

Finally, I'm not advocating a "nat's-ass" precision here, just some common sense - 336 psf is a pretty big load to apply to an entire floor.

RE: Liquor Warehouse Live Load....

A side issue perhaps, but what is the structural system? Composite framing would be convenient because the composite flexural strength and stiffness are often overkill by very large margins. In other words, you might not need much extra to get your upper-end load of 336 psf, relieving your need to spend more time thinking about this.

Now where's my penny?


RE: Liquor Warehouse Live Load....

I'd be inclined to go 250psf or higher.
What happens when they stock up for Christmas and decide to just pack the whole area solidly? Or use it for temporary storage the day a big load gets delivered.

Also depending on the structural system, don't forget that the worst loading situation can be when every second bay is loaded.

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