The ovens arrive in one piece, with no assembly required. For our Forno Toscano product line of single chamber ovens (Margherita, Mangiafuoco, & Marinara), the oven carts require about fifteen minutes of assembly, and we’ve made some instructional videos to help guide you through the assembling process. Our videos also show you how to secure the oven onto the cart after it’s assembled. For our double chamber ovens, the cart arrives fully assembled; you simply have to place the oven on the cart and attach the roof with screws that we provide.