Tin mining began early in the Bronze Age, as bronze is a copper-tin alloy.in extraction and use can be dated to the beginnings of the Bronze Age around 3000 BCE, when it was observed that copper objects formed of polymetallic ores with different metal contents had different physical properties.
Quick Answer. Most semi-trailers weigh about 32,000 pounds when they are empty. Because the amount for a payload must be evenly distributed, the amount of cargo a trucker can haul is no more than 34,000 pounds if he is pulling tandem trailers. Continue Reading.
exists and is an alternate of . A typical fully loaded concrete delivery truck can weigh up to 70,000 pounds (35 tons). An empty truck weighs between 20,000 and 30,000 pounds and a full load of 10 cubic yards of concrete weighs about 40,000 pounds. That said, concrete with 5 to 8% air entrainment for freeze/thaw protection will weigh proportionally less.