Abstract: A cargo restraining floor clamp for use in refrigerated carriers having a T-type flooring structure to enable such carriers to be used for the transport of general types of cargo, thus minimizing the problem of deadheading of these containers on a return trip. The floor clamp includes a channel shaped top floor plate positioned across the top of two adjacent T shaped floor members, and an under floor hold down plate positioned beneath the T tops between the two adjacent T shaped floor members. A pair of eye bolts extend through the top floor plate, between the two adjacent T shaped floor members, and through the under floor hold down plate, and serve to clamp the plates to opposite sides of the T tops of the T shaped floor members.