Engineered Web Truss joists are the most expensive floor systems in the industry and are worth every dollar.  Unlike other residential floor systems, Web Trusses provide space for installation of plumbing, electrical and HVAC duct systems so contractors do not have to cut into structural support joists, which weakens a critical part of the structural integrity of the home. With Web Truss Joist systems, floors are more level, the framing carpenter has four inches vs two inches of joist to attach the wood floor sub floor, and this truss system is the most proven method to reduce annoying floor squeaks that occur over the years.  As Pierce's structural engineers design the truss system, they take into consideration the future weight load and the span of the truss.