Patent ID: 8646642

Claim:
A floating cover roof for a storage tank comprising: a frame assembly having a holding frame having an outer periphery; multiple longitudinal beams and each longitudinal beam having a cross sectional shape; a connecting seat having a top; a bottom; two opposite sides; and a fixed board formed on the top of the connecting seat and having a width; a first holding segment mounted on and protruding from one of the opposite sides at the bottom of the connecting seat and having a top face; and a second holding segment mounted on and protruding from the other opposite side at the bottom of the connecting seat and having a top face; and multiple transverse beams, each two of the transverse beams connected to two adjacent longitudinal beams to form a locating area between said two transverse beams and said two adjacent longitudinal beams, and each transverse beam having the same cross sectional shape and structures as those of a corresponding one of the longitudinal beams; and an outer rim mounted around the outer periphery of the holding frame to hold the beams of the holding frame in the outer rim; and multiple floating units respectively mounted in the locating areas of the frame assembly, connected to the beams of the holding frame and each floating unit having a hollow outer casing mounted in one of the locating areas of the holding frame between the corresponding beams, connected to the adjacent beams and having a casing body mounted in the locating area of the holding frame between the corresponding beams that form the locating area and having an opening top; a closed bottom abutting the top faces of the holding segments of the corresponding beams that form the locating area; an internal surface; a chamber being square, formed in the casing body and communicating with the opening top of the casing body; and a connecting flange formed annularly on and protruding from the casing body around the opening top of the casing body and abutting the corresponding beams that form the locating area of the holding frame; and a top board mounted on the connecting flange of the casing body over the chamber of the casing body to close the opening top of the casing body.