What thoughtful of lumber is usually used to ship solid equipment?

I wanted to used these decks outside and put outdoor runner on them. These decks were made to support filling equipment that were being sent elswhere. I can't convey but I think it is pine which I know isn't good for outdoor use.
What do you reflect?
Answers:
When I used to work in a furniture warehouse, our shipments by rail be supported by Oak. Pine is not very strong, so you're not likely to see it used for calorific shipment. Cottonwood is also being used with increasing frequency.
Maybe you should sort a quick trip to the lumber yard to see if you can find a clash...

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