Here is a list of standard features that stand up to anything.

-Bulkhead & Doghouse - 3/16" Steel Plate, Full-Width Cleanout, Reinforced, Fully-Welded To Top Rail.
-Cable Hook - 1-1/4" High-Tensile Steel Plate, Inserted Thru Hook Plate, Locked In And Fully-Welded Both Sides. Lifetime Guarantee.
-Nose Rollers - 4" OD x 6" Long x 1" Thick Heavy-Duty Steel
-Bullnoses - 1-1/2" Steel Plate
-Bulkhead Corners - Wrapped with 11 Gauge Steel Plate Formed And
Fully-Welded
-Hook Plate - 3/4" Steel Plate 12"x36", Fully-Welded Rail To Rail.
-Bulkhead Verticals - 6" Structural Steel Channel
-Top Rails - 4 x 3 x 11 Gauge Structural Steel Tube
-Floor Plate - 3/16" Steel Plate, One Piece.
-Main Rails - 6" x 2" x 3/16" Structural Steel Tube
-Crossmembers & Side Rails - 3" High-Strength Structural Steel Channel. -Crossmembers are on 14" Spacing.
-Sides & Gate - 11 Gauge Steel Plate Fully-Welded To Top Rail and
Floor Plate
-Side Posts - 11 Gauge Steel Plate Four-Way Formed 3" Deep x 5" Wide
On 20" Centers
-Wheels - 8" Heavy-Duty Steel Pipe 10" Long

All Welding Is Heavy-Duty. All Rails, Tubing Members, Channel Members And Framing Are One Piece. Customize Your Container By Choosing One Of Many Options.