Specialty Window & Door Projects Layout & planning to prepare for cutting opening for large Bow Window. Temporary wall to support ridge beam. New framing. Quadruple 2x4s on each side, supporting double ply-lam beams, which now support the ridge beam. Construction is actually stronger than before. Finished Bow Window installation prepared for painting. New 5-lite Bow Window with all 5-lites operable. Homeowners delighted with results.