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.
The weight limit on single axles is 20,000 lbs, dual axles 34,000 and steer axles 12,000 lbs. On federal highways, semi trucks can be up to 102 inches wide and tow one 48-foot trailer or (2) 28-foot trailers. There is no height limit, except for structural clearances.