This can be further subdivided as uncoursed, coursed, random, dry, polygonal and bint. Considering the dressing and finishing of the stones, it is further sub-divided into first class, second class and third class masonry. 00Na8srE The two main classifications of Stone Masonry are: Rubble Masonry; Ashlar Masonry; 1. The stones are not suitably shaped or finished and as such the elevation of this type of masonry shows irregular shaped stones with non- uniform joints. (i) Uncoursed rubble masonry: This is the cheapest, roughest and poorest form of stone masonry. Are you planning to build your home using stones? The strength of this masonary depends upon the bond between the stones. Corbel: Corbel is a projecting stone that is usually moulded on top of the wall and given a decorative treatment. c) Dry rubble masonry . Houses built in stone masonry are found in rural and urban areas around the world. Un-dressed or partially dressed stones are used in this masonry. Semi-dressed stone masonry is characterized by one wall wythe (usually exterior) built using shaped stones; usually only the exposed stone surface is shaped. The quoins or corner stones, a are hammer-dressed on top and bottom, and may be either cut stone or rock face. c. Coursed Square rubble masonry: The square rubble masonry in which chisel dressed stones laid in courses is called coarse square rubble masonry. Dry rubble masonry Rubble/field stone masonry is composed of uncoursed rounded field stones or roughly-cut stones used for construction with or without mortar. Clockwise from top left: Some hard, intractable stones broke naturally into random shapes, which were laid closely-jointed to form polygonal or rag walling. Dry-stone random rubble walls, for which rough stones are piled up without mortar, is the most basic form. There are three types of Coursed rubble masonry. Coping and step stones shall be roughly hammer-dressed on top, their outer faces pitched to true lines, and be of such thickness (not less than six inches) and have such projections as the engineer may direct. This paper compares and summarizes design specifications and construction requirements, with a specific focus on “nominally reinforced rubble stone masonry (NRM) with cement mortar and wooden diaphragms in seismic areas.” (i) Uncoursed rubble masonry: This is the cheapest, roughest and poorest form of stone masonry. Coursed rubble stone masonry is made with broken stones of widely different sizes and qualities that are laid in level courses. In this type of masonry, the stones roughly dressed to an irregular polygonal shape. If you’re set to using stones, you should know the types of stone masonry to help you with the design. The experimental study included a shake table test on a one-third scaled struc-tural model, a representative of DS masonry structure em-ployed for public critical facilities, e.g. Rubble masonry may be laid coursed or uncoursed. The stone blocks used in ashlar masonry are very different than random uncut stones, which are sometimes called rubble. This standard was first published in 1967. Rubble masonry is further sub-divided into the following three types: a) Random rubble masonry . The stones are to be laid in courses of equal layers. If the face stones are hammer dressed and the thickness of mortar joints does not exceed 12 mm, it is known as random rubble masonry II sort. When coursed, the stones are leveled off at specified heights to an approximately horizontal surface. 1. Types of Stone Masonry: Rubble Masonry When roughly dressed or undressed stones are laid in a mortar the result is a stone rubble masonry. in order that the masonry develops adequate strength and presents a neat appearance. These masonry constructions do not have a uniform thickness. The strength of the rubble masonry is dependent on the: Coursed Rubble Masonry: In this types of stone masonry, the height of stones is 5 cm to 20 cm. This is a superior variety of rubble masonry. Rubble Masonry. Nearly 325 seismic and masonry codes from all over the world have been analyzed, of countries where stone masonry was, or still is, abundantly practiced. 1. You might have seen this type of masonry on the slopes of canals for erosion protection. d. Dry Rubble Masonry In this masonry the joints are not of uniform thickness. Stone veneer Stone veneer is used as a protective and decorative covering for interior or exterior walls and surfaces. 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