Inhaltsangabe
Excerpt from Mill Building Construction
The weight of steel in the sides and roofs of mill buildings, with out cranes, is from 4 lbs. To 6 lbs. Per square foot of exposed sur face for the frame only. Corrugated iron sheathing weighs from 1 lb. To 2 lbs. Per square foot. These weights, with steel at 5_cts. Per lh., make the cost of steel buildings from 25 cts. To 40 cts. Per square foot of exposed surface. A rough approximate rule for calculating the extra weight of steel required in columns and girders when traveling cranes are used is as follows: Add 100 lbs. Of steel per lineal foot of building for every five tons of crane capacity. This would give for a 5-ton crane an addition of 100 lbs. Per lineal foot and for a 20-ton crane an addition of 400 lbs. Per lineal foot.
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