List and briefly explain each of the three grades of brick

10) Commonly used types of steel fire proofing include? a) Spray-applied b) Encasement in concrete c) Enclosed in multiple layers of Drywall d) All of the Above 11) Deflection track is used to? a) Bend metal studs b) Isolates the partition from deflection preventing structural loads from distorting the partition c) Keeping masonry from uncontrolled cracking d) All of the Above 12) Which is not a type of steel frame buildings? a) Moment-Resisting b) Shear c) Braced d) Post-Tensioned

.

Describe the single wall core barrel.