Buried at the bottom of
http://agoracom.com/ir/patriot/forums/discussion/topics/586570-another-htc-pacer-civil-minute-order-9-20-13/messages/1840168. There's no mention of "rebuttal" time so I suppose it comes out of the 15 hours allowed for direct and cross examination. There is an hour allowed for closing arguments, or maybe for open and close combined, for each side.
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"Parties are allotted 1 hour each for opening statements and closing arguments, 15 hours each for
direct and cross-examination (exclusive of jury selection), and 30 minutes each for voir dire.
9 jurors will be seated, no alternates, 3 peremptories per side."