In a broad aspect, purlin forming machine provides a roll forming machine includes at least one roll by a pair of section elements of diversity, at least some elements are remote that the best is an independent, axial substitution, or otherwise be able to position adjustment by means of the remote control to change the configuration file, said at least one roller pair. One of the elements, usually in the form of roll is part of independent alternative arrangements, for example, arranged in a roll on roll about a vertical axis, and is favorable. This is because it allows large sections of the roll, or geometry, for example, or scroll through the adjacent elements to increase or decrease, such as rolling element spacing may be. According … industrial boilers , roll forming machine , fork lift truck