... runs vertical up and down from side to side, which allows the snow to slide off of the roof. ... makes it easy for the snow to slide off, which means no more scraping or shoveling snow off the ... longer sizes?Yes, there is a wide variety of sizes available in our steel and metal garages. They come 12’, 18 ... and 30’ widths. We also have our 40’ wide, which comes in 32’, 34’, 36’, 38’, and 40’ lengths. The ...