63 joint tooling required for giving beauty to mortar

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Unformatted text preview: eauty to mortar joints Weathered Joint: Mortar joint has sloped (downwards) edge Concave joint: Joint concave inwards Vee joint: mortar joint is in the form of a V Flush Joint: Mortar joint is flush with the brick surfaces Raked Joint: A large portion of the mortar joint is raked out - Not a safe, impermeable joint impermeable Struck Joint: Mortar joint has a sloped (upwards) edge Mortar joints can vary from 1/4” to 1/2” - Usually taken as 3/8” 37 Laying Masonry Layout & Leads Line 38 Stationary Scaffolding 39 Masonry Joints Weathered Concave Size Vee Joint Tooling Flush Joint Profiles Racked Concave Struck 40 Concave Joints 41 Raked Joints 42 43 9.7 TYPES OF BRICK MASONRY WALLS AND STRUCTURES STRUCTURES 9.7.1 Spanning Openings in Brick Walls Brick walls must be supported above openings for windows or doors, using Brick reinforced concrete lintels, reinforced brick,or steel angles reinforced A corbel is an ancient structural device of limited spanning capability, that may be used for small openings in brick walls, for beam brackets, and for ornamental provisions. provisions. Arches can be used instead of lintels to span large openings in walls- Different forms of arches can be built: Segmental Arch, Jack Arch, Tudor Arch, Elliptical Arch, Roman Arch (cylindrical shape), Goethic Arch, Parabolic - Arch Terminologies: Intados, Extrados, Soffit, Spring line, Parabolic Skewback, Crown, Span, Rise Steel Lintel 45 Simulated Precast Concrete Lintel (actually a steel lintel supports the assembly) 46 Arch 47 48 49 50 9.7 TYPES OF BRICK MASONRY WALLS AND STRUCTURES STRUCTURES 9.7.3 Reinforced Brick Masonry: A reinforced brick masonry wall in constructed with two wythes of brick, 2” reinforced to 4” apart, placing the reinforced steel in the cavity and filling the cavity with grout. Grout is a mixture of Portland cement, aggregate and water. Grout must be filled enough to flow readily into the narrow cavity and fill it completely Two methods are used in building reinforced brick walls: Low-lift method: Low-lift Height of grout filling is not more than 4 feet - Wythes are held together by galvanized steel wire ties at 24” c/c horizontally and 16” c/c vertically High-lift method: Wall is grouted, one story at a time - Clean out holes are High-lift left at the bottom to drive out the debri (from mortar in brick masonry) down with water through the holes - Finally the clean out holes are sealed with a brick and mortar joint...
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