It looks good for some industrial stuff and warehouses.
It could use a variety different textures or adjustable materials, maybe some warning/ danger signs for decals, I beams and zig zag I beam things that go on ceilings of warehouses, those yellow guard ralls that keep forklifts from hitting walls and to designate walkways, and warehouse interior office parts (yeah, an interior’s interior 
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Also, some yellow, white, and candy cane line decals can also be used to designate walkways. It is a small detail, but those markings make the place feel functional.
Here is sample pic: http://www.wirecrafters.com/images/products/protective-railings/guardrail-systems/WireCrafters-guard-rail-protecting-office-from-forklift.jpg
Looks good so far 
EDIT : also, warehouse floors are usually pretty flat looking for concrete, and can vary from pretty shiny to very little specular and usually is done with fairly large square tiles
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Hope this helps!