Re: COATING PROBLEM Hello; First of all, with the purlin command, you can create a surface on which you can properly mount the cladding at column alignments. Then, if you can create 2 purlins at the scissor level using the single purlin command, you can insert a coating between the single purlins with the inter-element coating command. During single purlin modeling on the scissors, you can use the create special snapping points command on the object, for example, after selecting the scissor upper heading and right-clicking, to enter the purlin from the appropriate points. If you have a problem, you will be helped if you send your project to the steel support mail. Good work.