Here is a relevant reference from the Books where a heavy whip is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
To be sure, Boots had been beaten with a heavy whip, of the sort used on men, whereas she would find herself under only the familiar, common five-stranded Gorean slave lash.
Players of Gor Book 20 Page 208