Tapersplit shakes have a natural taper that is similar to the taper of a shingle. Straight-. split shakes are of the same thickness throughout the length of the shake. No. 1 Handsplit and tapersawn shakes of clear heartwood with no more than 20% flat-grained pieces in.
The axle load of a wheeled vehicle is the total weight felt by the roadway for all wheels connected to a given axle.Viewed another way, it is the fraction of total vehicle weight resting on a given axle.xle load is an important design consideration in the engineering of roadways and railways, as both are designed to tolerate a maximum weight-per-axle (axle load); exceeding the maximum rated axle load will cause damage to the roadway or rail tracks.
Furthermore, it is not the wheel load but rather the damage to the pavement caused by the wheel load that is of primary concern. The most common historical approach is to convert damage from wheel loads of various magnitudes and repetitions (âmixed trafficâ) to damage from an equivalent number of âstandardâ or âequivalentâ loads. The most commonly used equivalent load in the U.S. is the 18,000 lb (80 kN) equivalent single axle load (normally designated ESAL). At the time of its development (early 1960s at the AASHO Road Test) it was much easier to use a single number to represent all traffic loading in the somewhat complicated empirical equations used for predicting pavement life.