Custom-Size Configurable Industrial Sectional Overhead Door For Non-Standard Workshop Openings A Custom-Size Configurable Industrial Sectional Overhead Door is made to order for non-standard workshop openings. Where a stock door will not fit, our custom sizes and options allow the width, height, panel material, color, and accessories to be specified so the door matches the building exactly. Made to Fit Awkward Openings Workshops often have opening dimensions and clearances