41.52.00 Bulk Material Storage
41.52.16.23 Concrete Cone-Bottom Silos
41.52.13 Bins and Hoppers 41.52.13.13 Fixed Bins and Hoppers 41.52.13.23 Portable Bins and Hoppers 41.52.13.33 Bulk Material Containers 41.52.13.43 Returnable Bins and Hoppers 41.52.13.53 Throwaway Bins and Hoppers 41.52.16 Silos 41.52.16.13 Concrete Flat-Bottom Silos 41.52.16.16 Concrete Masonry Flat-Bottom Silos 41.52.16.23 Concrete Cone-Bottom Silos 41.52.16.26 Concrete Masonry Cone-Bottom Silos 41.52.16.29 Steel Cone-Bottom Silos 41.52.19 Bulk Materials Storage Tanks 41.52.19.13 Stationary Bulk Materials Storage Tanks 41.52.19.33 Mobile Bulk Materials Storage Tanks 41.52.41 Pneumatic, Block-Distributed Materials Fluidizing System for Flat-Bottom Bins and Silos 41.52.43 Aerated Trough Materials Fluidizing System for Flat-Bottom Bins and Silos 41.52.46 Pad-Mounted Aerated Disc Materials Fluidizing System for Cone-Bottom Bins and Silos