This 24U (4ft), 4 post server rack can be mounted with all standard rack or cabinet mount shelves, panels, or cable management accessories. The width is fixed at 19" wide, and the depth is adjustable from 24" to 36" deep in 1" increments by loosening 4 screws.
Question: Is this rack 4ft. 4-Post Rack - 34-100814, square holes or threaded round holes?
Answer: Thank you for your inquiry. This rack has threaded round holes.
Question: What is the load/weight capacity?
Answer: Thank you for your inquiry,
Weight capacity for the 34-100814 24U 4-post rack is rated at 1000lbs. That being said, they have held up to 1900 lbs before collapsing in testing.