Shipping Crate Dimensions Question 2018

When looking at the 2018 Shipping Crate Construction guidelines, I noticed that there has to be two piece of 4 x 4 (3.5 x 3.5in) lumber underneath the crate. However, the details are very vague, and I am unsure if this is included in the 60 inch height limit. Any ideas?

Thanks,

3501

P.S. Sorry if this is in the wrong Forum. First time posting on here :slight_smile:

It is included.

The crate overall dimensions are set up the shipper.