Abstract: A dolly apparatus for facilitating handling of heavy objects and comprising wheel mounted main support frame means and secondary frame means carried thereby, said secondary frame means being movable between a raised and a lowered position. In the lowered position of the secondary frame, the dolly apparatus may be easily rolled beneath the object to be maneuvered, whereupon the secondary frame means may be elevated for lifting the object in order to move the object simultaneously with the wheeled dolly apparatus. The main support frame structure is of a width slightly less than the inboard dimension of the support wheels, and the secondary frame means is of an overall width slightly greater than the outboard dimension of the wheels. The secondary frame is so constructed as to be lowered to a position overlaying a portion of the wheels whereby the supporting portion of the dolly apparatus is of a maximum width without unduly increasing the overall width of the entire dolly apparatus.