After the SpaceX CRS-4 launch of Dragon on F9, Hans Koenigsmann, SpaceX head of launch operations is quoted as saying:
Koenigsmann said that shorter gaps between launches should become more routine for SpaceX. “In the future, I anticipate this will be the norm,” he said at a pre-launch briefing Sept. 20, crediting parallel processing at the launch site for enabling the fast turnaround. “We’re ramping up for that launch rate and even more than that.”
Thus, when we look at the LC-40 hangar, it looks fairly narrow for two cores. Especially since the primary core needs to be mounted on the rail transporter, which runs down the center of the building. So does not seem likely to even be able to shuffle over and share the space. Additionally it seems like that would need a second cradle to handle the booster stage.
The Dragon capsule is managed at the back end (assuming the Falcon rolls out the front, reverse terms as needed) of the hangar, and they have the SPIF building for payload processing if needed as well.
So how are they handling parallel processing of cores? Leave it on the truck transporter in the hangar? Or is the payload the bottleneck, and thus cores are easier to prepare for launch. (Which would actually be the best outcome, right? Cores are easy, payloads are hard means pushing more cores through the process faster is easier).