Self-supporting solutions can be installed between 25-60°, on either an upstand (on a flat roof) or as a non-protruding installation in a sloped roof. Furthermore, it is possible to install a dual pitched solution with a girder at the ridge. From single-storey extensions incorporating a flat roof that features stylish, frameless glass lanterns to fill the new space with. I'm here to help you figure it out — no jargon, no hassle. Ask anything, and I'll do my best to get you what you need. Get Started with AI Navigator COPYRIGHT © 2026 INTERNATIONAL CODE COUNCIL, INC. ICC Digital Codes is the largest provider of model codes, custom codes and. Given the growing use of large and complex sloped glazing systems—considered to be installations where the glass is inclined 15 degrees or more from vertical—as creative architectural statements, the design criteria for them are rapidly evolving. Our systems are made to order, so the choices available are almost unlimited. There are two types of glass glazing bar: self supporting and rafter supported.