Bearers span between supports as single or continuous spans; minor depth deficiencies may be packed with corrosion-resistant incompressible packing over the full support; spring is placed upward; joints occur only over supports with at least 50 mm bearing each side; crippled bearers count as single span; bearers are fixed to supports for bearing and lateral restraint; larger bearers may be nail-laminated or built as spaced pairs with blocking at set intervals.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.