Yeah those Cheiftecs.....
(I'm thinking of the wildly popular Chieftec Dragon with the curved slats on the front intake)
Yup, all of my old Chieftecs were variants of that design. Different front bezels (varying geometry for the vent holes/slats and early ones lack the little door with the front USB ports), but the interiors were identical. It meant I didn't need to keep track of which drive cages and rails went with which case, since they were all interchangeable.
Sturdy enough to sit on. And yes, they weigh a ton.
The PC I put together for my son to take to college went into the Antec variant. At some point he decided he was into LAN parties; he got a real workout hauling that thing around (he didn't have a car).
Wish you could see the innards on the Chieftec website. I'm curious if it's been improved since the days where I had one of them.
edit: the 3.5" drive bays got turned sideways, but otherwise, nope
That's the mid-tower variant.