What type of landscape elements are in this image? They are commonly used near parking lots and are designed to treat surface runoff water by removing silt and pollution before the drainage course delivers the water to a watershed or storm sewer.
A. Retention ponds
B. Detention ponds
C. Bioswales
D. Silt fences
What is the minimum spacing of bolts specified by AISC? and preferred spacing? A. 1 1/4 times the diameter of the bolt; 2 times preferred B. 1 3/4 times the diameter of the bolt; 2 1/4 times preferred C. 2 1/3 times the diameter of the bolt; 2 2/3 times preferred D. 2 2/3 times the diameter of the bolt; 3 times preferred E. 3 times the diameter of the bolt; 3.25 times preferred
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