Abstract: A tandem axle trailer frame is provided having front and rear ends and an animal enclosure is mounted on the trailer frame. The front end of the frame includes a forwardly projecting towing tongue extending forwardly of the enclosure and the enclosure includes a forward end including opposite side forwardly and oppositely outwardly facing front wall portions having animal ingress openings formed therein. First closure structures removably close the ingress openings and the enclosure includes a rearwardly facing rear wall including an animal egress opening formed therein. Second closure structure removably closes the egress opening. The first closure structures for closing the ingress openings include vertically swingable combined closure door and ramp structures swingable between upstanding closed positions closing the ingress openings and outwardly and downwardly inclined open ramp-defining positions.

Abstract: A sheet metal duct section component including at least one pair of adjacent longitudinally extending integral panel portions relatively angulated about a longitudinal zone connecting adjacent longitudinal marginal portions of said panel portions. At least one pair of corresponding ends of the panel portions include individually bendable flanges extending endwise outwardly therefrom. The flanges are bent relative to and toward corresponding sides of the panel portions into generally coplanar relation and include outer end extremities bent backwardly over the flanges to define double thickness flanges. A filler plate of a thickness at least generally equal to the double thickness flanges and including an outside corner defined by adjacent relatively angulated marginal edges of the filler plate is provided and substantially conforms to the inside corner defined by the adjacent marginal portions of the double thickness flanges.