Answer: Black Satin is sometimes listed as an erect variety, but since it is a bit long for that you also see it listed as a semi-trailing variety. You may want to experiment a bit and see which training method works best for you with the spacing you used when you planted them. General care and pruning/supports are discussed in detail in the publication below.
This variety will runner, this is discussed in the following article along with propagation by tip layering.
Enjoy your blackberries!
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