we are pretty much resigned to the fact that buying all of the pieces to build a datacenter/colo/telecom facility, everything is going to be in US customary units, because that's what the suppliers have. It's a vicious cycle of nobody in the US choosing to stock metric items, so nobody can buy it, and all of the end users just use things that are US units. It can be the smallest things like threaded rod uses to hang overhead fiber trays in a datacenter (all of the fasteners, bolts, nuts, the rod itself, etc) are all in US units. All the way up to the largest things like $150,000 generators where all of their specifications are in US units and fuel consumption figures in gallons, etc. If it involves the construction industry it's 99% of the time going to be US customary units.
We only get down to proper metric units when dealing with the fiber itself, but even that is lashed to aerial pole-to-pole strands, where the steel strand is in US units, all of the hardware is US.
The battery backup shelves for large AGM lead acid batteries: All US units. The batteries themselves are specified in inches and pounds. Once again it can all be converted, but that's the default unit from the manufacturer. Floor loading calculations? Pounds per square foot.
We only get down to proper metric units when dealing with the fiber itself, but even that is lashed to aerial pole-to-pole strands, where the steel strand is in US units, all of the hardware is US.
The battery backup shelves for large AGM lead acid batteries: All US units. The batteries themselves are specified in inches and pounds. Once again it can all be converted, but that's the default unit from the manufacturer. Floor loading calculations? Pounds per square foot.