A double-deck trailer with a frameless top includes two front vertical rods and two rear vertical rods respectively; each of the front vertical rods and the rear vertical rods is sequentially fixed with a top fixing piece and a middle fixing piece from top to bottom; a rectangular area is formed between four top fixing pieces and the middle fixing pieces, and a cloth pocket is arranged in the area; the cloth pocket includes side pockets and a front pocket; the side pockets are respectively located between two adjacent front vertical rods and two adjacent rear vertical rods, and the front pocket is located between the front vertical rods and the rear vertical rods; zippers are respectively arranged on both sides of the front pocket; after zippers are pulled down, the front pocket naturally hangs down, and items can pass between front vertical rods and rear vertical rods.

Described herein is a multi-use platform that is capable of being manipulated into multiple configurations. Example configurations include a mechanic's creeper (first configuration), a pushcart (second configuration), a hand truck (third configuration), a work platform, e.g., scaffold (fourth configuration), and a work bench (fifth configuration).

The present disclosure relates to an expandable platform cart, the core of which comprises a frame, a double-tier load-bearing platform, and an extension system. The double-tier platform supports categorized storage: the lower tier holds heavy items to lower the center of gravity, while the upper tier stores lightweight items; an X-shaped telescopic frame features a linked folding mechanism, allowing volume reduction for transport in a single step. An extension plate achieves rotational storage through oblong holes and a connecting shaft, working in tandem with the tension assembly to automatically tension and support the unfolded state.