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.
LABOR DAY. Quick Facts : Labor Day. Labor Day is celebrated as a national holiday on the first Monday in September in Canada and United States since the 1880s to pay tribute to the contributions, workers have made to make the country strong and prosper. In most of the other countries 1st May is celebrated as Labor Day.