Check out this collection of modular industrial environmental assets available at no charge.
The ProductionCrate team has announced the release of a free pack with 3D modern industrial models. It contains a lot of pre-ready builds to ease the mega-structures creation process. The developers mention that all these modular assets are compatible with Blender, Cinema4D, Maya, Houdini, and 3DSMax. The models can be downloaded in the FBX format, and used in commercial and non-commercial projects.
You can use the assets for creating exterior and interior scenes of industrial platforms, warehouse scaffolding, and walkways. Also, it includes multiple decorative elements such as pipes, air ducts, cables, tubing, buttons, lights, etc.