A built-up roof (BUR) consists of multiple plies where a ply is defined as one felt field mopped with asphalt. The thickness of one BUR ply is approximately 30 mil. A modified bitumen roof (MBR), on the other hand, consists of modified bitumen sheets. What is the composition of a modified bitumen sheet and its typical thickness?
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A modified bitumen sheet consists of two (fiberglass and polyester) mats adhered together with modified asphalt and this assembly, coated with modified asphalt on both faces. It is 100 mil to 200 mil thick, i.e., thickness of one modified bitumen sheet is equal to that of three to seven BUR plies.
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? JIdentify and state the historical significance of ohn C. Calhoun.
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Which of the following are not used to keep water away from a structure?
a. positive grade b. detention pond c. drainage swale d. diversion berm
The original colonists were avid hunters who knew how to utilize the wild fauna and animals found in the "new" land
a. True b. False Indicate whether the statement is true or false
The typical mechanical components of a hydraulic brake system include all of the following EXCEPT:
A. brake pedal B. master cylinder C. brake pads D. brake drums