Pressure Treated 2X4X10. Alkaline copper quatenary/copper azole lumber. One of the 2x10 has a split on the end going about a foot into the wood. Alohabob (structural) 20 apr 04 08:44.
You could also use a species cedar or redwood have this quality.
Find pressure treated lumber at lowest price guarantee. Bylar (structural) 6 may 04 08:10. Was leftovers from a project. If installing pressure treated wood that is still damp from pressure treatment, expect shrinkage to occur. Handling pt lumber is not good. Uniform thickness, density and appearance for stable and long lasting performance; 6x6s for support posts and plywood. Scaffold grade 2x10 can span 6 feet at reasonably high loads, so it's not out of the question that lower grade, wet i've seen plenty of 2x6 t&g floors at 4' and even 5' span.