Most Common Types Of Concrete Masonry Units
The cement-aggregate ratio in concrete blocks is 1:6. So, it takes less time to construct concrete masonry than brick masonry. They are laid with their length parallel to the face of the wall. A typical mortar consists of 1 part cementitious material to 2 ¼ – 3 ½ parts sand by volume.
Masonry walls are the most durable part of any building or structure. They provide strength,, durability to the structure and also …Chapter 8 Flashcards – Most Common Types Of Masonry Units
So for large work of masonry like for load bearing walls these solid blocks are preferable. They are light weight blocks and easy to install. In case of piers or pillars these blocks are widely used. Dry-press process – use mold clays that shrink excessively during drying. Air present is removed then clay is extruded through a rectangular die. Definition to serve as a cushion to masonry units, to seal units to keep water and wind away, adhesive. What are the molding processes used in manufacturing bricks?
It has a depression in one broadside of the brick)4. Why does a mason lay leads rather than just laying bricks from onecorner of the building to the other?
Draw each brick and /li/ululliits surrounding mortar joints as accurately as you can. Draw mortar joint thickness accurately. Figures 8.25 through 8.33 for examples of various techniques for spanning wall openings. You may use special brick shapes if you wish. Use any bond you wish, and special brick shapes as you see fit. Use any bond you wish, and special brick shapes as you see fit /li/ululli. What is the function of each ingredient?
Which tooling profiles are suitable for a brick wall in a severe climate?
Concave and vee joints are suitable for severe climates. Vertical reinforcing bars grouted into hollow bricksc. The main classifications of building stone are igneous, sedimentary,
and metamorphic. Limestone is a soft, even-grained, sedimentary stone thatcannot be polished. Granite is a very hard igneous stone that canalso be polished.2. The quarry block is sliced into slabs using a gang saw. Finally, the edges of the slab are squared by a circular saw.3. Distinguish rubble tone from ashlar stone. Rubble stonesare irregular in shape. Why is marble or limestone stonework never washed with acid, as brickworkis?
Marble and limestone react with acid and are consumed byit.)4. How is the curing of concrete masonry units accelerated after theyare molded?
Rubble stone cannot be coursed in a wall. There are no artisans left who have the skill and knowledge to carveornamental stonework. Marble work should be cleaned with muriatic acid after the mortarhas hardened sufficiently. There is no truly standard size of concrete block. Leads are not constructed for concrete masonry walls. When water reaches the cavity, it has no place to go but down. At the bottom of the cavity, the water is caught by a flashing and drainedout through weep holes. The function of internal flashings is to catch and drain to the outdoorsany water that penetrates the wall.3. Their function is to drain water thataccumulates over the flashing. Concrete masonry walls require control joints to prevent random crackingof the masonry when it dries and shrinks. Joints should be located at points of weakness in the wall: at windowand door openings, at changes of direction, at changes of height.
Balloon framing minimizes the vertical shrinkage of the wood framing,
which minimizes the tilting of floor and roof surfaces that might otherwiseresult.8. When masonry work is carried out in subfreezing weather, the workareas should be sheltered from wind by temporary enclosures.
The masonry units, sand,
and water should be heated as required. Adjustable ties make it easy for the mason to tie courseswhose bed joints do not line up. Why is it wise to spend a little extra to use proven materials forflashings in masonry walls?
Where should building separation joints be located?
What is the chief reason to build a masonry cavity wall?
A cavity wall is much more resistant to the passage of water than a solidwall. Additionally, a cavity wall may be thermally insulated by addingslabs of plastic foam insulation within the cavity.)5. Sketch a detail section of the base of a cavity wall with a brickfacing and an 8″ concrete block backup. Bricks tend to expand after installation, whereas concrete masonryunits tend to shrink. Efflorescence on brickwork usually indicates serious problems inthe wall. Brick masonry has no reliable tensile strength. Where an internal flashing meets the exterior surface of a masonrywall:a. The flashing should project at least 3/4″ (19mm) outside theface of the wall.c. The flashing should be turned down to form a drip.e. To prevent water from leaking in at the ends of masonry unitsc. Movement joints should be located in masonry walls”a. Internal flashings should be located in masonry walls:a. Steel structural shapes are produced by passing steel between rollerswhile it is still hot enough to be formed easily. The top flange of a beam is often coped so its top surface can liein the same plane as the top of a girder to which it is connected.
A seated connection is used to connect a beam or girder to a column web,
because it allows better access for pneumatic wrenches in this restrictedlocation than does a framed connection.)4.
Riveting of steel building frames is obsolete. Plumbing-up refers to the process of raising sections of steel fromthe ground to their position in the building. Column baseplates for smaller columns are usually attached to thecolumns in the fabricator’s shop. Rigid frames are economical for low-cost manufactured steel buildings. Tensile structures made of steel cables can be made rigid againstwind uplift. In general, the details of light gauge steel framing are similarto those of wood platform frame construction. Diagonal bracing is achieved with specialsteel straps.3. Wood framing is not subject to corrosion, and is perhapseasier to join than steel. What is the function of a web stiffener?
What is gypsum sheathing, and why is it used?
It is agypsum panel product with a water-resistant facing and core. Why is a mastic adhesive used between wood subflooring panels andmetal joists?
Steel framing is not capable of framing such intricate shapes aswood framing. Finish nails are used to attach wood baseboards and trim to steelframing. Cold-formed steel framing and light gauge steel framing generallyrefer to exactly the same system of construction. Exterior and interior joist bearingse. Admixtures are sometimes added to the mix toregulate its properties or the properties of the finished concrete. Stirrups act to resist the diagonal tension forces that occur nearthe ends of concrete beams.7.
Concrete Blocks “Imagination Unlimited” Besser Company; Jam Handy
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