2.- Also, luffing-jib cranes can improve material handling cycles in the jobsite, using them like auxiliry cranes to the pricinpal tower cranes, reducing the construction time. 3.- Normally, the maximun load bigger than a tower craneâs. 4.- In some places, local laws make luffing-jib cranes necessary. For instance,
Updated July 22, 2016. Observed on the first Monday in September, Labor Day is the day to âthrow down your tools,â and eat too many hotdogs while thanking American workers for their collective contribution to the strength, prosperity, quality of life, cold beer, and great sales enjoyed across the nation.
Why Do We Celebrate Labor Day? Labor Day is a bittersweet holiday. Itâs the day on the calendar that signals summer has come to a close but on the other hand it means one last long weekend blowoff to end it on a high note. Yet few know why we celebrate the holiday and how it came about. Labor Day, the first Monday in September, is a creation of the labor movement and is a tribute to the contributions of the American workforce. Labor Day historyâs dates back to the late 19th century.