this bend 39 is continued until a second u shaped lockseam part 40 is formed as also noted from these fig7 12 the first u shaped lockseam part 37 faces inwardly of the rail whereas the second u shaped lockseam part 40 faces outwardly of the rail also as shown in fig1 12 and 13 the lockseam part 40 is disposed laterally outwardly of the left edge 41 of the fabric with the fabric extending down the step 36 and the edge 41 lying along the bottom of the step in contrast the right edge 42 of the fabric extends to the bend 33 of the first lockseam part as the laminated strip 10 is fed through the roller dies 24 30 a compression of the laminated strip is performed in addition to the roll forming operation in particular the fabric 12 is gradually compressed and actually embossed into the metal strip 11 this is shown in a greatly exaggerated state in fig4 the embossing is necessary to finished rail 13 a thickness dimension which will allow it to be used with existing metal rail hardware and processing equipment in the presently preferred embodiment the metal strip is approximately 0 018 34 thick and the fabric approximately 0 055 34.