a multipurpose aquatic float has a molded shell of plastic resin . the float has a generally rectangular base part with a set of integral mounting flanges on its top surface . the mounting flanges are arranged to provide a longitudinal center channel for accepting a framing member of standard dimension lumber . transverse flanges support the longitudinal flanges and provide a cross channel at the center and end notches to accommodate cross bracing in the frame on which the float is mounted . the longitudinal flanges have molded - in fastener receivers for receiving fasteners that secure the float in place on the framework of the support structure .