How far apart are the beams on a lattice patio cover? 0 The single rafter beams are 24” apart and the double rafter beams are 48” apart. The lattice tubes are typically 2″–3” apart but can be customized depending on how much shading you want. Recent PostsLouvered Patio CoverSunroom ContractorSunroom Designs that Enhance Your HomeSunroom Additions in Orange County, CA