Span Chart for Ipe DeckingNominal Dimension Finish Dimension Joist Spacing 1x4 3/4" x 3 1/2" 16" 1x6 3/4" x 5 1/2" 16" 5/4x6 1" x 5 1/2" 24" 2x6 1 1/2" x 5 1/2" 32"Note: Ipe Is a very strong material. The joist spacing shown is very conservative and designed ...