DURADEK ® has a higher ultimate load carrying capacity. 3/16" x 1-1/2" Bar, 1-3/16" o.c. 48" Span, Ultimate Load = 1,160 PSF WEIGHT DURADEK ® I-6000, 1-1/2" 3.3 PSF 3/16" x 1-1/2" Bar, 1-3/16" o.c. 11 ...