Abstract: A roof bow adapted to support a roof skin of a trailer and be affixed to spaced apart top rails of the trailer. The roof bow includes an elongated channel and a pair of end pieces affixed to opposite ends of the elongated channel by clinching. When viewed in cross section transverse to its general extent, the channel includes a substantially flat central portion and extending end portions defining support surfaces offset vertically from the central portion. The support surfaces are adapted to support the trailer sheet skin. Each end piece includes a substantially flat flange and an angled arm extending away from the flange. The angled arm adapted to be affixed to a respective one of the trailer top rails. For each of the pair of end pieces, a plurality of clinch joints affix the flange to the central portion of the channel.