the longitudinal channel 42 at either end of the float the transverse flanges 40 are offset from the respective float ends to provide end notches 46 and 48 to accommodate further frame members a drainage groove 50 extends along the base of each of the channels 42 and 44 and along the base of each of the notches 46 and 48 to drain water away from the frame member each of the longitudinal flanges 36 has a molded in fastener receiving tube 52 this extends transversely through the centre of the flange as illustrated most particularly in fig5 and 8 the tubes accommodate fasteners such as screws or through bolts for fastening the frame members in place in the channel 42 frame members seated in the transverse channel 44 and the end notches 48 are connected to the frame members in the channel 42 the manner of mounting frame members on the float is illustrated in fig2 and 10 in fig2 a longitudinal framing member 54 consisting of two side by side lengths 56 and 58 of 2 u00d7 6 dimension lumber extends along the channel 42 a transverse frame element 60 extends into the channel 44 to abut against the side of the framing member 54 fasteners in the form of screws 61 and galvanized washers 62 fasten the frame member 54 in the channel 42 while the 2 u00d7 6.