Modular universal flat bed cart with variable support and maneuvering handles

A cart comprising:

• an essentially flat bed section having upper and lower sides and opposed end sections;
• a wheel set attached to said lower side of said bed section;
• handle structures at said opposed end sections of said flat bed section, each handle structure comprising:
• a pair of vertically extending laterally spaced parallel central post members having upper and lower ends and defining an upwardly open central channel extending from above said upper side of said bed section to said upper ends of said central post members;
• a pair of vertical side post members having upper and lower ends, said side post members located at opposite lateral sides of said central post members and extending parallel to said central post members;
• a generally horizontally and laterally extending lower post support bar rigidly connected to said lower ends of said central and side post members and to said bed section;
• at least one horizontal interconnecting bar extending between and rigidly connected to each central post member and an adjacent side post member at a vertical location approximately mid-length of said central post member and below said upper end of the respective side post member, to thereby define an upwardly open side channel between each side post member and central post member above said upper side of said bed section.