Rat trap bond is a masonry technique in which the bricks are laid in such a manner that a discontinuous cavity is formed between two faces of the wall. Types of brick bonds difference between english bond. Nov 15, 2014 flemish bond types of flemish bond in flemish bond, each course consists of alternate headers and stretchers. Rat trap bond is a special type of masonry construction which is economical when compared to conventional masonry. Rat trap bond also chinese bond substantially observes the same pattern as flemish bond, but consists of rowlocks and shiners instead of headers and stretchers. As the construction is appealing to the eye both internally. If mortar is placed carefully on the bricks some of it will fall into the cavities and be wasted. For example, in the uk a brick is defined as a unit having dimensions less than 337. Bricks their properties and use the brick development association published by the construction press ltd in 1974. Brick bonds ceramic materials architectural design. Both these bond patterns were used for the experimental programme with one brick thick walls.
Brickwork is masonry produced by a bricklayer, using bricks and mortar. These short solved questions or quizzes are provided by gkseries. English bond is considered as the strongest and most widely used brick bond in construction work. The structural properties, construction cost, energy efficiency and thermal comfort were. Due care must be taken while designing the wall lengths and heights for a structure. Provide basic concepts as well as construction details for earthquakeresistant. May 22, 2017 constructing brick wall using rat trap bond constructing brick wall using rat trap bond. Every alternate course starts with a header at the corner. By adopting this method of bonding of brick masonry compared to traditional english or flemish bond masonry, it is possible to reduce in the material cost of bricks by 25% and about. Basic construction training manual for trainers 15 ongoing brick wall rat trap bond construction 1. Disadvantages of rat trap bond some of the disadvantages of a rat trap bond can be listed as follows. Rap trap bond rat trap bond rat trap bond is laid by placing bricks on their sides having a cavity of 4 100 mm, with alternate course of stretchers and headers.
Normally the will be better in structural aspects as well as walls done with the rat trap bond is kept thermal aspects. Rat trap bond rat trap bond is laid by placing bricks on their sides having a cavity of 4 100 mm, with alternate course of stretchers and headers. This is similar to flemish bond, but the bricks are laid onedge, so the lap is. I love organization and all that comes with it so a book of standards, as in this is. Rat trap bond when kept exposed, creates aesthetically pleasing wall surface and the cost of plastering and painting may also be avoided. The openings and wall dimensions to be in multiples of the module. There may be a problem of sound insulation due to the internal cavity. The rat trap bond is a masonry technique, where the bricks are used in such a way which creates a cavity within the wall, while maintaining the same wall thickness as for a conventional brick masonry wall. The author gautam bhatia tries to frame most of the works of baker in this book although it was a tough job. Pdf comparative performance of masonry bond patterns. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in. Rat trap bond advantages, disadvantages, construction method, saving rat trap bond is known as the chinese bond. Another use for split building bambooin lime concrete is for foundations, especially. Jul 11, 2016 rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall.
This gives a wall with an internal cavity bridged by the rowlocks, hence the reference to rat traps. The rat trap bond is a masonry technique that creates a hollow cavity between bricks while keeping the. The rat trap brick wall can be constructed in 8 or 9 thicknesses its strength is compatible with to standard 9 brick wall, but consumes 20% less. The overall cost saving on wall constructed by rat trap bond compared to the conventional 9. Changing architectural styles on the forest edge 1850 1914. The rat trap bond is simply a method of laying bricks when building a wall.
Rat trap bond masonry is a technique where bricks are laid on their edges. Construction of an ecofriendly building using green building. This rat trap bond manual is part of the practical construction know. Sustainable design in context to energy saving in buildings. Experimental study of structural behaviour of chinese bond brick. This can be avoided by holding a piece of wood about 3feet x 3inches x 34inch over the middle of the wall to cover the cavities while applying the mor tar. Modern bricks that allow for the construction of smart and cost. Brick bonds ceramic materials architectural design free. Rat trap bond pdf a rattrap bond is a type of wall brick masonry bond in which bricks are laid on edge. Stretcher bond is generally used for the construction of brick corbel 56. A rat trap for luring and capturing live rats and the like, comprising an outer housing normally fixedly embedded in the ground and having at least one opening through the side thereof near the surface of the ground, a removable container fitted within the outer housing and having at least one opening through the side thereof in registry with the opening in the outer housing, whereby rats and.
Remember above the lintel there are in most cases no openings but masonary has to continue. A free pdf download of this book is available from. Free download in pdf building construction short questions and answers for competitive exams. This book is the most the important and complete publication on laurie baker yet. Nov 06, 2012 need clarification on the following, reg rat trap bond sir 1. Of bricks and bonds the rat trap bond architecturelive. It can be avoided by the use of snapped headers to create other forms of brickwork. Show full abstract given area, rat trap bond is also gaining popularity.
Flemish bond brick masonry brick, brick masonry, flemish. Abstract building construction in india is estimated to grow at a rate of 6. The compressive strength of rat trap bond prism of from tables 5 and 6 and figs. Typically, rows of bricks called courses are laid on top of one another to build up a structure such as a brick wall bricks may be differentiated from blocks by size. This is a brick masonry method of wall construction in which the bricks get placed in a vertical position instead of horizontal position which creates the cavities or hollow space in the wall.
Earth bricks and blocks comparative performance of bu rnt. The rat trap bond construction technology is a cavity walling system. Rat trap bond technique used for compound walls reduces the cost of construction and provides an ethnic look filler slab. To break the vertical joints in the consecutive courses queen. A multicriteria decision analysis based assessment of. If proper technique and care are not taken, wastage of mortar may occur. The bricks are placed in vertical position, so that 110 mm face is seen from front elevation, instead of the 75mm face considering brick of standard size 230 x 110 x 75 mm. As this type of masonry has 30% of cavities, the dead load of the structure is reduced which in turn reduces the structure supporting members such. Also the course below sill and lintel to be a solid course by placing bricks on edge. These short objective type questions with answers are very important for board exams as well as competitive exams. Since width of wall remains 230mm, an internal cavity is created. As this type of masonry has 30% of cavities, the dead load of the structure is reduced which in turn reduces the structure supporting members such as column and footing. Stretcher bond now used for most cavity brick walls but has a monotonous appearance.
For the breaking of vertical joints in the successive courses, closers are. How to build a school building in developing countries. Building walls with rat trap bondtheyre really cool bt. Guidelines for earthquakeresistant construction of non. Construction of an ecofriendly building using green. Random rubble arch foundation is used for these houses. It consists of construction of headers and stretchers where bricks are used to lay vertically in the edge of the masonry wall, so as to form a cavity inside the wall as in fig. Hope house construction low cost feature rat trap bond. The first rule of starting any masonary whether exposed or not is to place all the units bricks, blocks, or stones in the bond decided all over the plinth even covering the door openings. Rat trap bond pdf a rat trap bond is a type of wall brick masonry bond in which bricks are laid on edge i. All these will create many challenges to the professionals involved in the building industry that have to be solved by. Following are additional objectives of this guideline. The filler slab concrete roof filled with light weight clay materials like mangalore tiles or clay bowls reduces the cost of roof slab and provides good thermal comfort. Hence approximately 25% less bricks and 40% less mortar is used compared to conventional one.
Rat trap bond brick wall construction by earthbound. Evaluation of appropriateness of rattrap bond wall and. Rat trap bond brick wall construction by earthbound architecture. Highly skilled and trained labour is required for the construction of a rat trap bond. This small book is about the best ways of using this common burnt brick, the simplest and least complicated of. Rat trap bond wall it is a cavity wall construction with added advantage of thermal comfort and reduction in the quantity of bricks required for masonry work. Rat trap bond advantages, disadvantages, construction. The air medium that is created by the bond helps maintaining a good thermal comfort inside the building. Establish comfort of working in rat trap bond correct use of tools practice basics of rat trap bond as learnt in module 3 target for construction on the first dayat least the first two courses of brickwork in rat trap bond including the door opening end of day one. The alternate headers of each course are centered over the stretchers in the course below. Types of brick bonds bonds used for bricks english.
Sep 03, 2019 indian housing scenario costeffective ecofriendly construction technology rat trap bond wall filler slab safety comfort acceptability adaptability article details this work is licensed under a creative commons attribution 4. Pdf thermal comfort in different construction methods. This manual specifically looks at lccr construction for coastal. This bond is not as strong as english bond and is not used generally. In many bonds blackended headers were used to form patterns and, occasionally, dates. If the english bond the bond pattern used for the wall is aesthetically can be improved to suit the rat trap bond then it pleasing then it will not be plastered. Jan i e co 1 kld water s q rain fo r demonstration of. It consists of an alternate course of headers and stretchers. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. Low cost rat trap bond for brick masonry rat traps, traps, rats.
Buildinghow products books volume a the construction the. In this arrangement, vertical joints in the header and stretcher courses come over each other. Because baker did not like to do his jobs on drawing tables rather he preferred on site decisions. In order to have a 35 figure 2 rat trap bond under construction comparison, locally manufactured standard and nonstandard burnt clay bricks were used to construct wall panels with english bond, and rat trap bond to a thickness of one brick. Building with many windows providing desired ventilation and light. Rat trap bond this rare bond was used in the early to mid 19th century as a cheap form of brickwork by laying the bricks on edge. Construction of an ecofriendly building using green building approach ashish kumar parashar, rinku parashar abstract raipur is the capital of the newly formed state of chhattisgarh, the environment of raipur city is very warm. Jun 01, 20 rat trap bond construction technique improves the performance of fired materials. Brick masonry types, tools, materials required and procedure.
The rat trap bond construction is a modular type of masonry construction. Click here to read in detail with picture rat trap bond. May 24, 20 the rat trap bond you can save about 25 per cent of costs on bricks with this simple method. Care must be taken while designing the wall lengths and heights for a structure. Here the use of the headers is distinct as the iron in the local clay has vitrified in the kiln to show a dark, shiny surface. Rat trap bond construction, advantages, and disadvantages. In the rat trap bond, bricks are placed in a vertical position in the form of a shiner stretcher in the vertical form and rowlock the header in the vertical form with a cavity in between the shiner at back and front face. Typically, a 75mm cavity is formed in a 230mm thick wall by placing the bricks on edge in a modular fashion. Building construction quiz building construction short.
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