Construction> Bracing Unpoured Walls See Also: Windows & Doors | Interior Walls | Ledger Boards/2nd Floor | Cabinets/Heavy Fixtures | Plumbing/Electrical Utilities Some Words of Advice BRACE BEAMS OVER GARAGE DOORS AND LARGE WINDOWS Don't be afraid to V-slot or cut out Grid-WALL and increase rebar diameter in garage door and large window spans for increased beam or lintel strength. As always: DOUBLE CHECK WITH ENGINEERS! Read more about bracing walls in the "Tips and Tricks" section of our website, a collection of useful information gathered over the years from builders' valuable experience.