Loss of labor productivity due to delivery methods and weather

This paper describes three structural steel erection projects that used dif ferent methods of delivering the structural steel members, Two projects sch eduled daily deliveries. On one project, steel was erected directly from th e truck. On the second project, steel was off-loaded, sorted, and then erec ted. On the third project, three bulk deliveries of steel were made. The st eel was stored wherever space was available, and sorting was done as the st eel was erected. The differences in labor productivity are quantified using the multiple regression technique. The analysis shows that the most effici ent delivery method is to erect the steel directly from the truck. Double-h andling, as was done on the second project, resulted in a loss of productiv ity of about 9%. Indiscriminate deliveries resulted in a loss of productivi ty of about 16%. The effects of weather are also quantified. Significant lo sses of productivity occurred because of snow (41%) and cold temperatures ( 32%).