Masonry 2 exam fully solved

The lintel should be laid over the opening___ After the bearing masonry has set. Hollow door jambs are filled with___ Mortar. The vertical sides of an opening as known as___ Jambs. The primary purpose of the sill is to___ Drain water away from the building. Slip sills are___ The same length as the door opening. Lug sills___ Extend into masonry on either side of the opening. Bricks for sills are usually laid___ Rowlock style Sills should slope 1 inch in___ 6 inches A support over a doorway is known as a___ Lintel For brick masonry, a lintel must extend a minimum of___ 4 inches on each side. A steel lintel should be set back from the face of the wall to allow room for___ A mortar joint. Slight movement occurs at the location of lintels; for this reason, _____ are often located at the ends. Control joints To increase the strength of a concrete lintel,_____ may be cast into the lintel. Reinforcing rods A lintel that can be built in place is a___ Continuous lintel. A grouted, reinforced horizontal or vertical collection of masonry units is known as a___ Bond beam. Steel is typically galvanized to protect it from___ Corrosion. Masonry walls are reinforced to carry___ Shear loads. Bolt cutters can be used to cut rebar up to size___ 4. Rebar is tied together using___ Soft-annealed wire. The resistance of masonry structures to cracking is increased by using___ Horizontal joint reinforcements. Continuous horizontal joint reinforcement is made of_____ steel to prevent corrosion. Galvanized The advantage of continuous adjustable joint reinforcement is that they___ Permit differential movement between wythes. Continuous horizontal tie should overlap by at least_____to provide good load transfer. 6 inches Rigid anchors resist_____while flexible anchors do not. Shear stress To spread the weight of particularly heavy load a___ Bearing plate is used. The chief advantage of aluminum for windows and doors is that it___ Will not corrode. After it is poured, grout is vibrated or rodded to___ Be sure no voids remain. If there is to be another lift, the grout should be poured to_____of the last block. Be sure no voids remain A mason can check that there is no mortar protruding inside a cavity that is to be grouted by looking in the___ Cleanout openings Before pouring a cavity wall, the mortar should harden for___ 3 days. In high-lift grouting for cavity walls, the lift should not exceed___ 9 feet. Grout that mounds over the reinforcement and creates a void causes a condition known as___ Bridging. If alternate cells in masonry block are to be grouted, mortar must be spread___ For full bed joints. Excess mortar in a cavity wall will___ Keep grout from properly bonding. When vibrated, newly placed grout becomes more liquid and___ Air voids rise to the surface The size, grade, and spacing of rebar are determined by the___ Project specifications Rebar is held in place using___ Spacers To prevent air pockets in the grout, wire ties on rebar must be___ Flush to the bar. The slope of the side and the front of the smoke chamber should be ___ 30 degrees The fireplace's decorative and architectural appearance is in the___ Front facing Grout is used in nonbearing walls to increase___ Fire resistance Grout should be fluid enough so that it does not___ Stick to the trowel The aggregate in fine grout must be less than ___ 3/8 inch Grout can be kept worktable for a longer time by adding ___ Retarders To increase the heat of hydration when placing grout in cold weather,_____can be added to the grout mix Accelerators On the job the in place compressive strength of grout is usually over___ 2,500 psi Fine grout is typically used to fill cavities that are smaller than___ 2 inches Grout should be placed within_____ minutes of mixing 90 Grout should be mixed for a minimum of___ 5 minutes A mechanical vibrator should be used to consolidate a lift over___ 12 inches For single wythe block walls mortar should harden for at least_____hours prior to grouting 24 A single wythe block wall to be grouted should be built to a height of no more than___ 5 feet A fireplace should have a foundation that is_____the foundation of the structure Independent of