There were special tracked vehicles with a robot arm to handle all the work of putting down the tracks in a perfect alignment, meaning the most physically demanding job left was joining the tracks together using the fishplates built into their ends, which was barely an effort with modern technology. A forklift did the job of moving the rails in the pallets forwards, to the wagon right behind the robot arm, keeping all the rails within its reach as it followed the road being built. It took a full workday to build the line out to construction site; a similar amount of time was spent preparing the branches of the improvised shunting yard that would be used for storing materials during construction. The first materials brought would be those needed to build the tensile structure where the necessary workers would live during construction.

The first locomotives came, bringing most of the supplies needed for the temporary tensile structure used by the workers, as well as the facilities they'd need. A worker in a forklift with a straight stick did the work of shunting the trains, making sure to keep all the trains with the same pair of colors together on their own sidings, and being sure that the wagons in the new trains were in the correct order. An insulated single-wire power line running in a protective tube to the site was sufficient for the small amount of energy needed for the skeleton crew, who smoothly and expertly prepared the tensile building that'd be their home for most of the next year in 2 weeks of furious work. For now, they enjoyed the sense of camraderie in all sleeping in their sleeping bags inside the largely empty structure, and the nostalgic vibe of grabbing a meal from a train car to reheat and enjoy in their deliberately retro break room.

Now that they had gotten settled, they could move on to really starting to build things. After finishing the grading and getting a good foundation, they could start building upwards. They'd set up cranes, able to smoothly lift the concrete walls that'd form the outermost shell of the hospital. Trains of cement powder fed the on-site cement mixer, keeping everything working smoothly as the building slowly took shape. With time, the huge factory-like building slowly started feeling more and more cramped, as the first rooms of he hospital became enclosed and started needing new people for the next stage of the work. Plumbing, electrical and HVAC trades started following the well-prepared, precise lines laid out by robots as they ran the pipes drawn on the ground that were their responsibilities. Compact wagons, sized not to damage the floors, were rolled onto AGVs, which were taken to where the work was happening and then left on racks within easy reach of the worksite, the special wagons held by their axles just barely past the wheels. Automatic forklifts handled the work of moving the racks themselves to where they were needed.

There was a bit of a delay, but the perfect time to start on the employee and outpatient residential block had come. There was an excellent room configuration with all the necessary forms ready to rent, so this would be as simple as moving them over and rapidly finishing the tunnel form casting. A crane lifted the liquid concrete to pour over the formwork, rapidly creating the outermost layer of walls. Next, the tensile structure factory started the work of preparing the rooms: adding services hookups, flooring, furniture and appliances, smoothly moving the rooms on an assembly line, rolling to stations on an AGV spreading the load of the room over a wide area. The final step was installing the interior walls and insulation, before letting the crane lift the complete room between the concrete walls and workers on the inside sliding it into its place on rollers. There was no skimping on concrete, naturally meaning high thermal mass and effective sound dampening. Even the biggest apartment only needed a few rooms with how big they all were, and workers slowly started moving in to the most finished lower floors, a friend group or two to a room. It was nicer than their old tensile building that had been turned into an assembly line.

After getting a lot done on the residential block, it was time to start building the last stages of the hospital: installing the utilities, the services, the furniture and the medical equiment. The assembly line moved to making entire patient rooms, the biggest ones that managed to squeeze past the doors of the tensile structure. Sleek, split-half robot ceiling hoists were installed in the ceiling, to let people walk anywhere within the room without any worry of falling over. Each room came with the maximally-accessible bathrooms that were the current standard, including the ultra-wide full-height doors built to let any kind of mobility device through; even a tiny amount of labor saved by patients being able to do their business themselves pays for itself many times over.  The rooms were naturally big enough to comfortably fit a small bubble bath for the maternity suites, a wonderfully decadent feature. The crane managed to smoothly place the patient rooms between the precast concrete walls. The intensive care units near the helipad on the roof, operating rooms, rehab space and nurses' stations had to have their construction finished inside the building rather than on the temporary assembly line, and this was done while the last of the rooms in the nearby residential block were assembled and craned in to place. As had been planned, both buildings were done nearly at the same time.

People in hospitals are both in a poor position to defend themselves, and often in incredibly agitating moments of their lives! Hence there is some additional effort taken in the name of hospital security, for patients and staff. There's a strict hierarchy of which guards work where, ranging from those protecting nuclear weapons during the time they exist to those patrolling an industrial warehouse to catch thieves a few hours later rather than the next workday. Guards working in hospitals... are about as close to the middle of the pack as you get. All the monitoring you could ever want can get hidden seamlessly in wall clocks, ceiling lights, and on those ceiling-mount cargo robots. Additionally, there's lots of illnesses going around in a hospital. Traditional sniffer boxes using bees were optimized for low costs in large production batches, but for ones that will reliably be used every day, whether in a hospital or in a kitchen, there's a better approach. Not a better approach than using animals for this too, but better animals to use.

Necrobotic antennas have an incredible sense of smell, making different electrical signals based on precisely which illness they smell. Bees in sniffers don't have the best memories, and once they've reached out to taste the nectar after smelling something they recognize, they don't reset to catch the next illness reliably. Antennas do this much better, and discrimate better, so it's worth the brain surgery to make them if you know they'll be set off and you want to reset them without needing to replace them.